Methods, network node, wireless device, media for 16-QAM based communication

Patent metadata

Field	Value
Publication number	US-12413459-B2
Application number	US-202117920550-A
Country	US
Kind code	B2
Filing date	Apr 22, 2021
Priority date	Apr 22, 2020
Publication date	Sep 9, 2025
Grant date	Sep 9, 2025

Abstract

Methods, a network node, a wireless device, and computer readable storage medium for 16-QAM based communication are disclosed. A method includes: determining a resource allocation for 16-QAM based communication for the wireless device; and indicating, to the wireless device, a TBS and/or a number of allocated time-domain resources that are associated with the determined resource allocation using a TBS index and a time-domain resource index, wherein the TBS index and the time-domain resource index are determined in accordance with a table for allocating transport blocks and/or number of allocated time-domain resources for the 16-QAM based communication.

First claim

The invention claimed is:

1. A method performed by a network node configured to communicate with a wireless device, the method comprising:
determining a resource allocation for 16-quadrature amplitude modulation, 16-QAM, based communication for the wireless device; and
indicating, to the wireless device, one or both of a transport block size, TBS, and a number of allocated time-domain resources that are associated with the determined resource allocation using a TBS index and a time-domain resource index, the TBS index and the time-domain resource index being determined in accordance with a table for allocating one of transport blocks and number of allocated time-domain resources for the 16-QAM based communication,
the table for allocating one of transport blocks and the number of allocated time-domain resources for the 16-QAM based communication corresponding to a time domain resource assignment (TDRA) rearrangement with respect to a table for allocating one or more of transport blocks and a number of allocated time-domain resources defined for a quadrature phase shift keying (QPSK) based communication, and the one or both of the TBS and the number of allocated time-domain resources being determined using the TBS index and the time-domain resource index that is corresponding to a reduced number of allocated time-domain resources compared to a number of allocated time-domain resources corresponding to the same TBS as required in the table for allocating one of transport blocks and the number of allocated time-domain resources defined for the QPSK based communication.

2. The method of claim 1 , further comprising:
transmitting, to the wireless device, an indication to use 16-QAM.

3. The method of claim 1 , wherein
the TBS is indicated using the TBS index and the time-domain resource index that are respectively different from those indicating the same TBS as required in the table for allocating one of transport blocks and the number of allocated time-domain resources defined for the QPSK based communication, wherein the time-domain resource index corresponds to a reduced number of allocated time-domain resources compared to a number of allocated time-domain resources corresponding to the same TBS as required in the table for allocating one of transport blocks and the number of allocated time-domain resources defined for the QPSK based communication.

4. The method of claim 3 , wherein the transport block redistribution with respect to the table for allocating one of transport blocks and the number of allocated time-domain resources defined for the QPSK based communication comprises:
one or more TBSs corresponding to a first subset of the TBS indices in the table for allocating transport blocks and/or number of allocated time-domain resources defined for the QPSK based communication being reused for the 16-QAM based communication but each being indicated by one or both of a TBS index and a time-domain resource index that are respectively different from those indicating the same TBS as required in the table for allocating one of transport blocks and the number of allocated time-domain resources defined for the QPSK based communication; and optionally
one or more TBSs in the table for allocating one of transport blocks and the number of allocated time-domain resources defined for the QPSK based communication being skipped for the 16-QAM based communication, the one or more skipped TBSs corresponding to a second subset of TBS indices in the table for allocating one of transport blocks and the number of allocated time-domain resources defined for the QPSK based communication; and
one or more TBSs corresponding to a third subset of the TBS indices in the table for allocating one of transport blocks and the number of allocated time-domain resources defined for the QPSK based communication being used for the QPSK based communication.

5. The method of claim 1 , wherein in a case where the 16-QAM based communication is used for downlink, the time-domain resource index corresponds to the number of allocated subframes, and the method further comprises:
switching to a 16-QAM based downlink communication from a QPSK based downlink communication according to the determined resource allocation, in which the same TBS as that defined for the QPSK based downlink communication is allocated for the 16-QAM based downlink communication along with a reduced number of allocated subframes corresponding to the same TBS as required for one or both of allocating transport blocks and number of allocated subframes defined for the QPSK based downlink communication to reduce signal to noise ratio, SNR, variation between the QPSK based downlink communication and the 16-QAM based downlink communication.

6. The method of claim 5 , further comprising:
transmitting a 16-QAM based downlink transmission to the wireless device, using a reduced number of allocated subframes compared to a number of allocated subframes corresponding to the same TBS as required for allocating one of transport blocks and the number of allocated subframes defined for a QPSK based downlink communication.

7. A method performed by a wireless device configured to communicate with a network node, the method comprising:
receiving, from the network node, indications of a transport block size (TBS) index and a time-domain resource index;
determining one or both of a TBS and a number of allocated time-domain resources using the received TBS index and time-domain resource index in accordance with a table for allocating one of transport blocks and a number of allocated time-domain resources for 16-quadrature amplitude modulation, 16-QAM, based communication to obtain a resource allocation for the 16-QAM based communication for the wireless device, the table for allocating one of transport blocks and the number of allocated time-domain resources for the 16-QAM based communication corresponding to a time domain resource (TDRA) rearrangement with respect to a table for allocating one or more of transport blocks and a number of allocated time-domain resources defined for a quadrature phase shift keying (QPSK) based communication; and
the one or both of the TBS and the number of allocated time-domain resources being determined using the TBS index and the time-domain resource index that is corresponding to a reduced number of allocated time-domain resources compared to a number of allocated time-domain resources corresponding to the same TBS as required in the table for allocating one or more of transport blocks and the number of allocated time-domain resources defined for the QPSK based communication.

8. The method of claim 7 , further comprising:
receiving, from the network node, an indication to use 16-QAM.

9. The method of claim 7 , wherein the one or both of the TBS and the number of allocated time-domain resources are determined using the TBS index and the time-domain resource index that are respectively different from those indicating the same TBS as required in the table for allocating one of transport blocks and the number of allocated time-domain resources defined for the QPSK based communication, wherein the time-domain resource index corresponds to a reduced number of allocated time-domain resources compared to a number of allocated time-domain resources corresponding to the same TBS as required in one or both of the table the number of allocated time-domain resources for allocating transport blocks defined for the QPSK based communication.

10. The method of claim 9 , wherein the transport block redistribution with respect to the table for allocating one of transport blocks and the number of allocated time-domain resources defined for the QPSK based communication comprises:
one or more

Assignees

• Ericsson Telefon Ab L M

Inventors

• Medina Acosta Gerardo Agni
• Zhang Liping
• Chen Jie
• Wang Yuan

Classifications

• H04L27/34

  Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems · CPC title

• H04L5/0094

  Indication of how sub-channels of the path are allocated · CPC title

• H04L5/0092

  Indication of how the channel is divided · CPC title

• H04L27/206 Primary

  using a pair of orthogonal carriers, e.g. quadrature carriers · CPC title

• H04L1/0005

  applied to payload information · CPC title