Transmitting apparatus, receiving apparatus and radio communication method

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By determining PRG size based on the number of contiguous resource blocks, the method addresses inefficiencies in precoding for non-contiguous bandwidths, enhancing communication quality in downlink shared channels.

CA3069613CActive Publication Date: 2025-10-28NTT DOCOMO INC

Patent Information

Authority / Receiving Office: CA · CA
Patent Type: Patents
Current Assignee / Owner: NTT DOCOMO INC
Filing Date: 2017-07-13
Publication Date: 2025-10-28

AI Technical Summary

Technical Problem

Existing communication systems face challenges in efficiently determining the size of precoding resource block groups (PRGs) when the transmission bandwidth includes non-contiguous resource blocks, leading to suboptimal precoding in downlink shared channels.

Method used

A method and apparatus for determining the size of precoding resource block groups (PRGs) based on the number of resource blocks within a bandwidth part, ensuring contiguous allocation and applying the same precoding across these blocks.

Benefits of technology

Enhances precoding efficiency by ensuring consistent precoding across contiguous resource blocks, improving communication quality in downlink shared channels.

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Abstract

The present invention is designed to realize DMRS allocation patterns that are suitable for future radio communication systems. According to the present invention, transmitting apparatus has a transmission section that transmits a data channel, and a control section that controls the allocation of a reference signal that is used to demodulate the data channel, and the control section determines the allocation pattern of the reference signal in the frequency direction and / or the time direction based on the number of symbols in which the data channel is transmitted.

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Description

5 10 15 20 25 CLAIMS 1. A terminal comprising: a receiver that receives downlink control information indicating a transmission bandwidth allocated to a downlink shared channel within a bandwidth part; and a processor that determines a size of a precoding resource block group (PRG), to which a same precoding is applied, based on the transmission bandwidth or a subset of the transmission bandwidth, wherein the processor does not expect that the transmission bandwidth includes non-contiguous resource blocks, wherein the processor determines the size of the PRG based on a number of resource blocks included in the bandwidth part, and wherein the PRG includes one or more resource blocks. 2. A radio communication method for a terminal comprising: receiving downlink control information indicating a transmission bandwidth allocated to a downlink shared channel within a bandwidth part; and determining a size of a precoding resource block group (PRG), to which a same precoding is applied, based on the transmission bandwidth or a subset of the transmission bandwidth, wherein the terminal does not expect that the transmission bandwidth includes non-contiguous resource blocks, wherein the terminal determines the size of the PRG based on a number of resource blocks included in the bandwidth part, and wherein the PRG includes one or more resource blocks. 46 Date Reçue / Date Received 2023-12-08 5 10 15 20 25 3. A base station comprising: a transmitter that transmits downlink control information indicating a transmission bandwidth allocated to a downlink shared channel within a bandwidth part; and a processor that determines a size of a precoding resource block group (PRG), to which a same preceding is applied, based on the transmission bandwidth or a subset of the transmission bandwidth, wherein the processor does not expect that the transmission bandwidth includes non-contiguous resource blocks, wherein the processor determines the size of the PRG based on a number of resource blocks included in the bandwidth part, and wherein the PRG includes one or more resource blocks. 4. A system comprising a terminal and a base station, wherein: the terminal comprises: a receiver that receives downlink control information indicating a transmission bandwidth allocated to a downlink shared channel within a bandwidth part; and a first processor that determines a size of a precoding resource block group (PRG), to which a same precoding is applied, based on the transmission bandwidth or a subset of the transmission bandwidth, the base station comprises: a transmitter that transmits the downlink control information; and a second processor that determines the size of the PRG, to which the same precoding is applied, based on the transmission bandwidth or the subset of the transmission bandwidth, 47 Date Reçue / Date Received 2023-12-08 wherein the first processor does not expect that the transmission bandwidth includes non-contiguous resource blocks, wherein the first processor determines the size of the PRG based on a number of resource blocks included in the bandwidth part, and 5 wherein the PRG includes one or more resource blocks. 48 Date Reçue / Date Received 2023-12-08

Claims

5 10 15 20 25 CLAIMS 1. A terminal comprising: a receiver that receives downlink control information indicating a transmission bandwidth allocated to a downlink shared channel within a bandwidth part; and a processor that determines a size of a precoding resource block group (PRG), to which a same precoding is applied, based on the transmission bandwidth or a subset of the transmission bandwidth, wherein the processor does not expect that the transmission bandwidth includes non-contiguous resource blocks, wherein the processor determines the size of the PRG based on a number of resource blocks included in the bandwidth part, and wherein the PRG includes one or more resource blocks.

2. A radio communication method for a terminal comprising: receiving downlink control information indicating a transmission bandwidth allocated to a downlink shared channel within a bandwidth part; and determining a size of a precoding resource block group (PRG), to which a same precoding is applied, based on the transmission bandwidth or a subset of the transmission bandwidth, wherein the terminal does not expect that the transmission bandwidth includes non-contiguous resource blocks, wherein the terminal determines the size of the PRG based on a number of resource blocks included in the bandwidth part, and wherein the PRG includes one or more resource blocks. 46 Date Reçue / Date Received 2023-12-08 5 10 15 20 25 3. A base station comprising: a transmitter that transmits downlink control information indicating a transmission bandwidth allocated to a downlink shared channel within a bandwidth part; and a processor that determines a size of a precoding resource block group (PRG), to which a same preceding is applied, based on the transmission bandwidth or a subset of the transmission bandwidth, wherein the processor does not expect that the transmission bandwidth includes non-contiguous resource blocks, wherein the processor determines the size of the PRG based on a number of resource blocks included in the bandwidth part, and wherein the PRG includes one or more resource blocks.

4. A system comprising a terminal and a base station, wherein: the terminal comprises: a receiver that receives downlink control information indicating a transmission bandwidth allocated to a downlink shared channel within a bandwidth part; and a first processor that determines a size of a precoding resource block group (PRG), to which a same precoding is applied, based on the transmission bandwidth or a subset of the transmission bandwidth, the base station comprises: a transmitter that transmits the downlink control information; and a second processor that determines the size of the PRG, to which the same precoding is applied, based on the transmission bandwidth or the subset of the transmission bandwidth, 47 Date Reçue / Date Received 2023-12-08 wherein the first processor does not expect that the transmission bandwidth includes non-contiguous resource blocks, wherein the first processor determines the size of the PRG based on a number of resource blocks included in the bandwidth part, and 5 wherein the PRG includes one or more resource blocks. 48 Date Reçue / Date Received 2023-12-08