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KR-102962410-B1 - Method, network node, wireless device, and medium for 16-QAM-based communication

KR102962410B1KR 102962410 B1KR102962410 B1KR 102962410B1KR-102962410-B1

Abstract

A method (700, 800) for 16-QAM-based communication, a network node (16), a wireless device (22), and a computer-readable storage medium are disclosed. The method (700) at the network node comprises: determining resource allocation for 16-QAM-based communication for the wireless device (S701); The wireless device includes displaying the number of TBS and/or allocated time-domain resources associated with resource allocation determined using a TBS index and a time-domain resource index (S703), wherein the TBS index and the time-domain resource index are determined according to a table for allocating the number of transport blocks and/or allocated time-domain resources for 16-QAM-based communication, wherein the table for allocating the number of transport blocks and/or allocated time-domain resources for 16-QAM-based communication corresponds to at least one of the following: a rearrangement of time-domain resource allocation for a table for allocating the number of transport blocks and/or allocated time-domain resources prescribed for QPSK-based communication, and a redistribution of transport blocks for a table for allocating the number of transport blocks and/or allocated time-domain resources prescribed for QPSK-based communication.

Inventors

  • 메디나 아코스타 제라르도 아그니
  • 장 리핑
  • 첸 지에
  • 왕 유안

Assignees

  • 텔레폰악티에볼라겟엘엠에릭슨(펍)

Dates

Publication Date
20260507
Application Date
20210422
Priority Date
20200422

Claims (20)

  1. A method performed by a network node configured to communicate with a wireless device, wherein the method is: A step of determining resource allocation for 16-orthogonal amplitude modulation (16-QAM) based communication for a wireless device; and The method includes the step of indicating to a wireless device one or both of a transport block size (TBS) and a number of allocated time-domain resources associated with resource allocation determined using a TBS index and a time-domain resource index, wherein the TBS index and the time-domain resource index are determined according to a table for allocating one of the transport blocks and a number of allocated time-domain resources for 16-QAM-based communication, and A table for allocating one of the transport blocks and the number of allocated time-domain resources for 16-QAM-based communication corresponds to a Time Domain Resource Allocation (TDRA) rearrangement for a table for allocating one or more transport blocks and the number of allocated time-domain resources defined for orthogonal phase shift keying (QPSK)-based communication, and A method in which one or both of the number of TBS and the number of allocated time-domain resources are determined using a TBS index and a time-domain resource index corresponding to a reduced number of allocated time-domain resources compared to the number of allocated time-domain resources corresponding to the same TBS as required in the table for allocating one of the transport blocks and the number of allocated time-domain resources prescribed for QPSK-based communication.
  2. In paragraph 1, A method further comprising the step of transmitting an indication to a wireless device for using 16-QAM.
  3. In paragraph 1, A TBS is represented using a different TBS index and a time-domain resource index, each representing a TBS identical to that required in a table for allocating one of the transport blocks prescribed for QPSK-based communication and the number of allocated time-domain resources, wherein the time-domain resource index corresponds to a reduced number of allocated time-domain resources compared to the number of allocated time-domain resources corresponding to the same TBS required in a table for allocating one of the transport blocks prescribed for QPSK-based communication and the number of allocated time-domain resources.
  4. In paragraph 3, The redistribution of transport blocks for a table to allocate one of the specified transport blocks and the number of allocated time-domain resources for QPSK-based communication is: One or more TBSs corresponding to a first subset of TBS indexes in a table for allocating transport blocks and/or allocated time-domain resources prescribed for QPSK-based communication, which are reused for 16-QAM-based communication but are indicated by one or both of different TBS indexes and time-domain resource indexes, respectively, and which indicate the same TBSs required in a table for allocating one of the transport blocks prescribed for QPSK-based communication and the number of allocated time-domain resources; and optionally, One or more TBSs in a table for allocating one of the transport blocks prescribed for QPSK-based communication that is skipped for 16-QAM-based communication and the number of allocated time-domain resources, wherein one or more skipped TBSs correspond to a second subset of the TBS index in the table for allocating one of the transport blocks prescribed for QPSK-based communication and the number of allocated time-domain resources; and A method comprising one or more TBSs corresponding to a third subset of a TBS index in a table for allocating one of the transport blocks defined for QPSK-based communication used for QPSK-based communication and the number of allocated time-domain resources.
  5. In paragraph 1, When 16-QAM-based communication is used for the downlink, the time-domain resource index corresponds to the number of allocated subframes, and the method is, A method further comprising the step of switching from QPSK-based downlink communication to 16-QAM-based downlink communication according to a determined resource allocation, wherein the same TBS as defined for QPSK-based downlink communication is allocated to 16-QAM-based downlink communication along with a reduced number of allocated subframes corresponding to the same TBS required to allocate one or both of the number of transport blocks and allocated subframes defined for QPSK-based downlink communication in order to reduce the signal-to-noise ratio (SNR) variation between QPSK-based downlink communication and 16-QAM-based downlink communication.
  6. In paragraph 5, A method further comprising the step of transmitting a 16-QAM-based downlink transmission to a wireless device using one of the transport blocks defined for QPSK-based downlink communication and a reduced number of allocated subframes compared to the number of allocated subframes corresponding to the same TBS required to allocate the number of allocated subframes.
  7. A method performed by a wireless device configured to communicate with a network node, wherein the method is: A step of receiving indications of a transport block size (TBS) index and a time-domain resource index from a network node; To obtain resource allocation for 16-QAM-based communication for a wireless device, the method includes the step of determining one or both of a transport block size (TBS) and an allocated time-domain resource number using a received TBS index and a time-domain resource index according to a table for allocating one of the transport blocks and the number of allocated time-domain resources for 16-Quadrature Amplitude Modulation (16-QAM)-based communication, wherein the table for allocating one of the transport blocks and the number of allocated time-domain resources for 16-QAM-based communication corresponds to a time-domain resource allocation (TDRA) rearrangement for one or more transport blocks and a table for allocating the number of allocated time-domain resources defined for Quadrature Phase Shift Keying (QPSK)-based communication, and A method in which one or both of the number of TBS and the number of allocated time-domain resources are determined using a TBS index and a time-domain resource index corresponding to a reduced number of allocated time-domain resources compared to the number of allocated time-domain resources corresponding to the same TBS as required in a table for allocating one or more transport blocks and the number of allocated time-domain resources prescribed for QPSK-based communication.
  8. In Paragraph 7, A method further comprising the step of receiving an indication for using 16-QAM from a network node.
  9. In Paragraph 7, One or both of the number of TBS and the number of allocated time-domain resources are determined using a TBS index and a time-domain resource index that are different from those indicating the same TBS required in a table for allocating one of the transport blocks prescribed for QPSK-based communication and the number of allocated time-domain resources, wherein the time-domain resource index corresponds to a number of allocated time-domain resources that is reduced compared to the number of allocated time-domain resources corresponding to the same TBS required in one or both of the tables for allocating the number of allocated time-domain resources prescribed for QPSK-based communication.
  10. In Paragraph 9, The redistribution of transport blocks for a table to allocate one of the specified transport blocks and the number of allocated time-domain resources for QPSK-based communication is: One or more TBSs corresponding to a first subset of TBS indexes in a table for allocating the number of time-domain resources and one of the transport blocks prescribed for QPSK-based communication, which are reused for 16-QAM-based communication but are each indicated by one or both of TBS indexes and resource indexes different from these time-domains, indicating the same TBS as required in the table for allocating the number of time-domain resources and one of the transport blocks prescribed for QPSK-based communication; and optionally, One or more TBSs in a table for allocating the number of transport blocks and/or allocated time-domain resources prescribed for QPSK-based communication that are skipped for 16-QAM-based communication, wherein one or more skipped TBSs correspond to one of the transport blocks prescribed for QPSK-based communication and a second subset of the TBS index in the table for allocating the number of allocated time-domain resources; and optionally, A method comprising one or more TBSs corresponding to a third subset of a TBS index in a table for allocating the number of transport blocks and allocated time-domain resources defined for QPSK-based communication used for QPSK-based communication.
  11. In Paragraph 7, When 16-QAM-based communication is used for the uplink, the time-domain resource index corresponds to the number of allocated time-domain resource units, and A method further comprising the step of switching from QPSK-based uplink communication to 16-QAM-based uplink communication according to acquired resource allocation, wherein the same TBS as defined for QPSK-based uplink communication is allocated for 16-QAM-based uplink communication along with a reduced number of allocated time-domain resource units corresponding to the same TBS required to allocate one or both of the number of transport blocks and allocated time-domain resource units defined for QPSK-based uplink communication in order to reduce the signal-to-noise ratio (SNR) variation between QPSK-based uplink communication and 16-QAM-based uplink communication.
  12. In Paragraph 11, A method further comprising the step of transmitting a 16-QAM-based uplink transmission to a network node using a reduced number of allocated time-domain resource units compared to the number of allocated time-domain resource units corresponding to the same TBS required to allocate one or both of the number of transport blocks and allocated time-domain resource units defined for QPSK-based uplink communication.
  13. In Paragraph 11, A method further comprising the step of performing power boosting by adding a power delta in the calculation of the transmission power of a wireless device to reduce the gap in terms of the required signal-to-noise ratio (SNR) between QPSK-based uplink communication and 16-QAM-based uplink communication.
  14. In Paragraph 7, When 16-QAM-based communication is used for the downlink, the time-domain resource index corresponds to the number of allocated subframes, and A method further comprising the step of switching from QPSK-based downlink communication to 16-QAM-based downlink communication according to acquired resource allocation, wherein the same TBS as defined for QPSK-based downlink communication is allocated to 16-QAM-based downlink communication along with a reduced number of allocated subframes corresponding to the same TBS required to allocate one or both of the number of transport blocks and allocated subframes defined for QPSK-based downlink communication in order to reduce the signal-to-noise ratio (SNR) variation between QPSK-based downlink communication and 16-QAM-based downlink communication.
  15. In Paragraph 13, A method further comprising the step of receiving a 16-QAM-based downlink transmission from a network node using a reduced number of allocated subframes compared to the number of allocated subframes corresponding to the same TBS required to allocate one or both of the number of transport blocks and allocated subframes specified for QPSK-based downlink communication.
  16. As a network node: At least one processor; and When executed on at least one processor, it includes at least one memory that stores an instruction causing a network node to perform the following, and the following is: Determine resource allocation for 16-quadruple amplitude modulation (16-QAM) based communication for wireless devices; A wireless device indicates one or both of the transport block size (TBS) and the number of allocated time-domain resources associated with resource allocation determined using the TBS index and the time-domain resource index, wherein the TBS index and the time-domain resource index are determined according to a table for allocating one transport block and the number of allocated time-domain resources for 16-QAM-based communication, and the table for allocating one transport block and the number of allocated time-domain resources for 16-QAM-based communication corresponds to a time-domain resource allocation (TDRA) rearrangement for one or more transport blocks and the number of allocated time-domain resources defined for orthogonal phase shift keying (QPSK)-based communication. A network node in which one or both of the number of TBS and allocated time-domain resources are determined using a TBS index and a time-domain resource index corresponding to a reduced number of allocated time-domain resources compared to the number of allocated time-domain resources corresponding to the same TBS as required in the table for allocating one of the transport blocks and the number of allocated time-domain resources prescribed for QPSK-based communication.
  17. In Paragraph 16, When executed on at least one processor, the instruction further performs the task of causing the network node to transmit an indication to the wireless device to use 16-QAM.
  18. As a wireless device: At least one processor; and When executed on at least one processor, the wireless device includes at least one memory that stores an instruction to perform the following, and the following is: Receive indications of transport block size (TBS) index and time-domain resource index from a network node; In order to obtain resource allocation for 16-QAM-based communication for a wireless device, one or both of the transport block size (TBS) and the number of allocated time-domain resources are determined using a received TBS index and a time-domain resource index according to a table for allocating one of the transport blocks and the number of allocated time-domain resources for 16-Quadrature Amplitude Modulation (16-QAM)-based communication, and the table for allocating one of the transport blocks and the number of allocated time-domain resources for 16-QAM-based communication corresponds to a time-domain resource allocation (TDRA) rearrangement for one or more transport blocks and the number of allocated time-domain resources specified for Quadrature Phase Shift Keying (QPSK)-based communication, and A wireless device in which one or both of the number of TBS and allocated time-domain resources are determined using a TBS index and a time-domain resource index corresponding to a reduced number of allocated time-domain resources compared to the number of allocated time-domain resources corresponding to the same TBS as required in the table for allocating one of the transport blocks and the number of allocated time-domain resources prescribed for QPSK-based communication.
  19. In Paragraph 18, A wireless device that, when executed on at least one processor, further performs the instruction to cause the wireless device to receive an indication to use 16-QAM from a network node.
  20. As a computer-readable non-transient storage medium, Having computer program instructions stored thereon, when the computer program instructions are executed by at least one processor, at least one processor: Determine resource allocation for 16-quadruple amplitude modulation (16-QAM) based communication for wireless devices; A wireless device indicates one or both of the transport block size (TBS) and the number of allocated time-domain resources associated with resource allocation determined using the TBS index and the time-domain resource index, wherein the TBS index and the time-domain resource index are determined according to a table for allocating one transport block and the number of allocated time-domain resources for 16-QAM-based communication, and the table for allocating one transport block and the number of allocated time-domain resources for 16-QAM-based communication corresponds to a time-domain resource allocation (TDRA) rearrangement for one or more transport blocks and the number of allocated time-domain resources defined for orthogonal phase shift keying (QPSK)-based communication. A computer-readable non-transient storage medium in which one or both of the number of TBS and the number of allocated time-domain resources are determined using a TBS index and a time-domain resource index corresponding to a reduced number of allocated time-domain resources compared to the number of allocated time-domain resources corresponding to the same TBS as required in the table for allocating one of the transport blocks and the number of allocated time-domain resources prescribed for QPSK-based communication.

Description

Method, network node, wireless device, and medium for 16-QAM-based communication The present invention relates to wireless communication, and in particular, to a method for 16-orthogonal amplitude modulation (16-QAM) based communication based on at least one of time-domain resource allocation rearrangement and transport block redistribution, a network node, a wireless device, and a computer-readable storage medium. At the Wireless Access Network (RAN) Plenary Meeting #86 (RP-193264), a new Work Item (WI) titled "Rel-17 Enhancements for NB-IoT and LTE-MTC" was discussed. In the Work Item Description (WID), one of the objectives is described as follows: - Specifies 16-Quadrature Amplitude Modulation (QAM) for unicast in Uplink (UL) and Downlink (DL), including necessary changes to the Narrowband Physical Downlink Shared Channel (NPDSCH) and DL power allocation for the DL Transport Block Size (TBS). This is specified without a new NB-IoT UE category. For DL, for example, the maximum TBS is increased to twice the 3GPP Release 16 (Rel-16) maximum, and the soft buffer size can be specified by modifying at least the existing Category NB2. For UL, the maximum TBS is not increased. [NB-IoT] [RAN1, RAN4] How "modulation and coding schemes (MCS), resource allocation and TBS allocation" are performed in both UL and DL in NB-IoT is described below, starting with DL. NB- in DLIoT(NarrowbandModulation and Coding Scheme (MCS) for the Internet of Things,resourcesAllocation and TBS Allocation According to one or more radio communication standards, such as 3GPP Technical Specification (TS) 36.321 v16.0.0, the existing available modulation order is Q m = 2 (i.e., Quadrature Phase Shift Keying (QPSK)), and in DL, within the context of transmitting data by a radio device (i.e., UE), the Transport Block Size (TBS) on NPDSCH is determined as follows: - Wireless devices, first, Read the 4-bit "Modulation and Coding Scheme" field (I MCS ) within the Downlink Control Information (DCI), and set I TBS = I MCS . - And, secondly, o Read the 3-bit "Resource Allocation" field (I SF ) within the DCI and determine its own TBS, for example, by the procedure in sub-section 16.4.1.5.1 of 3GPP TS 36.213 v16.0.0. Resource allocation information within DCI format N1, N2 (paging) for NPDSCH is displayed to the scheduled wireless device: - For example, the number of subframes (N SF ) determined by the resource allocation field (I SF ) within the corresponding DCI according to Table 16.4.1.3-1 of 3GPP TS 36.213 v16.0.0. - For example, the number of repetitions (N Rep ) determined by the number of repetitions field (I Rep ) in the corresponding DCI according to Table 16.4.1.3-2 of 3GPP TS 36.213 v16.0.0. For example, Table 16.4.1.3-1 of 3GPP TS 36.213 v16.0.0: to NPDSCHNumber of subframes for (NSF) for example, 3GPPTable 16.4.1.3-2 of TS 36.213 v16.0.0: to NPDSCHNumber of repetitions for (NRep) In relation to the above, Cat-NB2 devices can support TBS up to 2536 bits in DL. TBS is given, for example, by the (I TBS , I SF ) entry in Table 16.4.1.5.1-1 of 3GPP TS 36.213 v16.0.0. for example, 3GPPTable 16.4.1.5.1-1 of TS 36.213 v16.0.0: Transport Block Size (TBS) Table: NB- at ULIoTModulation and coding scheme (MCS) forresourcesAllocation and TBS Allocation NPUSCH Format 1 transmissions using 15KHz subcarrier spacing can be scheduled to use single-tone (π/2-BPSK, π/4-QPSK) or multi-tone allocation (QPSK) consisting of 3, 6, or 12 subcarriers. Furthermore, in the time domain, a given TBS can be mapped through one or more resource units. To determine the modulation order, redundancy version, and transport block size for NPUSCH, the following procedure may be followed in accordance with radio communication standards such as 3GPP TS 36.213 v16.0.0: - Wireless devices, first, o It can be configured by an upper layer for narrowband physical uplink shared channel (NPUSCH) transmission by reading the "Modulation and Coding Scheme" field (I MCS ) within the DCI or using pre-configured uplink resources, and o Reads the "redundancy version" field ( rvDCI ) within the DCI, and o Configured by an upper layer for NPUSCH transmission by reading the "Resource Allocation" field (I RU ) within the DCI or using pre-configured uplink resources, and For example, calculate the total number of allocated subcarriers (N RUsc ), the number of resource units (N RU ), and the number of repetitions (N Rep ) in accordance with sub-clause 16.5.1.1 of 3GPP TS 36.213 v16.0.0. ..., if N RUsc > 1, the radio device may use a modulation order Q m = 2. To determine the modulation order to be used for NPUSCH when N RU sc = 1, the radio device may use, for example, Table 16.5.1.2-1 of 3GPP TS 36.213 v16.0.0 and I MCS . For NPUSCH transmission with subcarrier spacing (△f = 15 kHz), the subcarrier indication field (I sc ) in the DCI determines a set of adjacently assigned subcarriers (n sc ) according to, for example, Table 16.5.1.1-1 of 3GPP TS 36.213 v16.0.0. for example, 3GPPTable 16.5.1.1-1