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EP-4407906-B1 - USER EQUIPMENT, BASE STATION AND METHOD

EP4407906B1EP 4407906 B1EP4407906 B1EP 4407906B1EP-4407906-B1

Inventors

  • NOGAMI, TOSHIZO
  • TAKAHASHI, HIROKI
  • YOKOMAKURA, Kozue
  • KITAHARA, MAKOTO

Dates

Publication Date
20260506
Application Date
20230301

Claims (5)

  1. A user equipment, UE, (1) comprising: high-layer processing circuitry (14) configured to acquire at least a first RRC parameter for indicating that a first information field is present in a DCI format, the first information field indicating whether a transform precoder is enabled or disabled for a PUSCH, and reception circuitry (10) configured to monitor the DCI format with CRC scrambled by C-RNTI and the DCI format with CRC scrambled by CS-RNTI, wherein a first number of bits is included in a second information field in the DCI format with CRC scrambled by C-RNTI with the first information field indicating the transform precoder as disabled, if a second number of bits included in the second information field in the DCI format with CRC scrambled by CS-RNTI is not equal to the first number, most significant bit of which a value is "0" is inserted to the second information field in the DCI format with CRC scrambled by CS-RNTI until the second number becomes equal to the first number, a third number of bits is included in the second information field in the DCI format with CRC scrambled by C-RNTI with the first information field indicating the transform precoder as enabled, and if a third number is not equal to the first number, most significant bit of which a value is "0" is inserted to the second information field in the DCI format with CRC scrambled by C-RNTI with the first information field indicating the transform precoder as enabled until the third number becomes equal to the first number.
  2. The UE according to Claim 1, wherein a fourth number of bits is included in the DCI format with CRC scrambled by C-RNTI with the first information field indicating the transform precoder as disabled, a fifth number of bits is included in the DCI format with CRC scrambled by C-RNTI with the first information field indicating the transform precoder as enabled, and if the fourth number is not equal to the fifth number, a bit of which a value is "0" is inserted to the DCI format with CRC scrambled by C-RNTI with the first information field indicating the transform precoder as enabled until the fifth number becomes equal to the fourth number.
  3. A base station (3) comprising: high-layer processing circuitry (34) configured to send at least a first RRC parameter for indicating that a first information field is present in a DCI format, the first information field indicating whether a transform precoder is enabled or disabled for a PUSCH, and transmission circuitry (30) configured to transmit the DCI format with CRC scrambled by C-RNTI and the DCI format with CRC scrambled by CS-RNTI, wherein a first number of bits is included in a second information field in the DCI format with CRC scrambled by C-RNTI with the first information field indicating the transform precoder as disabled, and if a second number of bits included in the second information field in the DCI format with CRC scrambled by CS-RNTI is not equal to the first number, most significant bit of which a value is "0" is inserted to the second information field in the DCI format with CRC scrambled by CS-RNTI until the second number becomes equal to the first number, a third number of bits is included in the second information field in the DCI format with CRC scrambled by C-RNTI with the first information field indicating the transform precoder as enabled, and if a third number is not equal to the first number, most significant bit of which a value is "0" is inserted to the second information field in the DCI format with CRC scrambled by C-RNTI with the first information field indicating the transform precoder as enabled until the third number becomes equal to the first number.
  4. The base station according to Claim 3, wherein a fourth number of bits is included in the DCI format with CRC scrambled by C-RNTI with the first information field indicating the transform precoder as disabled, a fifth number of bits is included in the DCI format with CRC scrambled by C-RNTI with the first information field indicating the transform precoder as enabled, and if the fourth number is not equal to the fifth number, a bit of which a value is "0" is inserted to the DCI format with CRC scrambled by C-RNTI with the first information field indicating the transform precoder as enabled until the fifth number becomes equal to the fourth number.
  5. A method for a user equipment, UE, (1) the method comprising: acquiring at least a first RRC parameter for indicating that a first information field is present in a DCI format, the first information field indicating whether a transform precoder is enabled or disabled for a PUSCH, and monitoring the DCI format with CRC scrambled by C-RNTI and the DCI format with CRC scrambled by CS-RNTI, wherein a first number of bits is included in a second information field in the DCI format with CRC scrambled by C-RNTI with the first information field indicating the transform precoder as disabled, and if a second number of bits included in the second information field in the DCI format with CRC scrambled by CS-RNTI is not equal to the first number, most significant bit of which a value is "0" is inserted to the second information field in the DCI format with CRC scrambled by CS-RNTI until the second number becomes equal to the first number a third number of bits is included in the second information field in the DCI format with CRC scrambled by C-RNTI with the first information field indicating the transform precoder as enabled, and if a third number is not equal to the first number, most significant bit of which a value is "0" is inserted to the second information field in the DCI format with CRC scrambled by C-RNTI with the first information field indicating the transform precoder as enabled until the third number becomes equal to the first number.

Description

[Technical Field] The present invention relates to a user equipment, a base station and a method. [Background] In the 3rd Generation Partnership Project (3GPP), a radio access method and a radio network for cellular mobile communications (hereinafter, referred to as Long Term Evolution, or Evolved Universal Terrestrial Radio Access) have been studied. In LTE (Long Term Evolution), a base station device is also referred to as an evolved NodeB (eNodeB), and a terminal device is also referred to as a User Equipment (UE). LTE is a cellular communication system in which multiple areas are deployed in a cellular structure, with each of the multiple areas being covered by a base station device. A single base station device may manage multiple cells. Evolved Universal Terrestrial Radio Access is also referred as E-UTRA. In the 3GPP, the next generation standard (New Radio: NR) has been studied in order to make a proposal to the International-Mobile-Telecommunication-2020 (IMT-2020) which is a standard for the next generation mobile communication system defined by the International Telecommunications Union (ITU). NR has been expected to satisfy a requirement considering three scenarios of enhanced Mobile BroadBand (eMBB), massive Machine Type Communication (mMTC), and Ultra Reliable and Low Latency Communication (URLLC), in a single technology framework. For example, wireless communication devices may communicate with one or more devices using a communication structure. However, the communication structure used may only offer limited flexibility and/or efficiency. As illustrated by this discussion, systems and methods that improve communication flexibility and/or efficiency may be beneficial. 3GPP document R1-2211049 "Discussion on dynamic waveform switching" from ZTE, 3GPP TSG RAN WG1 meeting #111, Toulouse, France, November 14th - 18th, 2022 discloses that dynamic waveform switching enhancement in R18 is applicable to PUSCH scheduled by DCI format 0_1 or 0_2 in PDCCH with CRC scrambled with C-RNTI, MCS-C-RNTI, or CS-RNTI with NDI=1. It also discloses that RRC contains " msg3-transformPrecoder" field. 3GPP document R1-2112941 "Introduction of Further enhancements on MIMO for NR" from Huawei, 3GPP TSG-RAN WG1 e-Meeting #107-e, November 11-19, 2021 discloses that if the bit width of a field in the DCI format 0_1 with CRC scrambled by CS-RNTI is not equal to that of the corresponding field in the DCI format 0_1 with CRC scrambled by C-RNTI for the same serving cell, a number of most significant bits with value set to '0' are inserted to the field in DCI format 0_1 with CRC scrambled by CS-RNTI until the bit width equals that of the corresponding field in the DCI format 0_1 with CRC scrambled by C-RNTI for the same serving cell. 3GPP document R1-2212446 "Summary #2 on dynamic switching between DFT-S-OFDM and CP-OFDM" from InterDigital, 3GPP TSG RAN WG1 meeting #111, Toulouse, France, November 14th - 18th, 2022 discloses that for DCI format 0_1/0_2 containing dynamic waveform indication, bit width of each field is set to the maximum between the bit width of the field if transform precoding is disabled and the bit width of the field if transform precoding is enabled, if different. Independent claim 1 defines a user equipment according to the invention. Independent claim 3 defines a corresponding base station according to the invention. Independent claim 5 defines a corresponding method at user equipment according to the invention. Preferred embodiments are defined in the dependent claims. [Brief Description of the Drawings] Figure 1 is a conceptual diagram of a wireless communication system according to an aspect of the present embodiment;Figure 2 is an example showing the relationship between subcarrier-spacing configuration u, the number of OFDM symbols per slot Nslotsymb, and the CP configuration according to an aspect of the present embodiment;Figure 3 is a diagram showing an example of a method of configuring a resource grid according to an aspect of the present embodiment;Figure 4 is a diagram showing a configuration example of a resource grid 3001 according to an aspect of the present embodiment;Figure 5 is a schematic block diagram showing a configuration example of the base station device 3 according to an aspect of the present embodiment;Figure 6 is a schematic block diagram showing a configuration example of the terminal device 1 according to an aspect of the present embodiment;Figure 7 is a diagram showing a configuration example of an SS/PBCH block according to an aspect of the present embodiment;Figure 8 is a diagram showing an example of the monitoring occasion of the search-space-set according to an aspect of the present embodiment;Figure 9 shows an example of PUSCH generation procedures at the UE side;Figure 10 shows an example of equation of DFT process for transform precoding;Figure 11 shows an example of payload size of DCI format 0_1 with CRC scrambled by C-RNTI prior to bit padding;Figure 12 shows a