PUSCH Transmission in TDD Special Subframes With HARQ Timing
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently allocating channels and resources for uplink data transmission in special subframes of Time Division Duplex (TDD) frame structures, particularly in supporting Hybrid Automatic Repeat Request (HARQ) operations.
Innovation Solution
A method and apparatus are provided to support uplink data transmission in special subframes by defining a timing relationship between Physical Uplink Shared Channel (PUSCH) transmission and HARQ feedback information reception, utilizing modified special subframe structures and new HARQ timing for TDD UL-DL configurations, including specific resource allocations and signaling methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink data transmission is supported in special subframes of TDD frame structure, then uplink data transmission rates and resource utilization are improved, but device complexity and protocol configuration complexity increase
Solution Approach 1:
The patent applies parameter changes by redefining the timing relationship parameters between PUSCH transmission and HARQ feedback reception for special subframes. Specifically, it configures different k values (e.g., k=4 for configuration 1, k=6 for configuration 2) based on TDD UL-DL configurations, allowing the system to adapt transmission timing parameters to different frame structures while maintaining standardized HARQ operation procedures.
Solution Approach 2:
The patent segments the HARQ timing configuration by creating separate timing relationship definitions for different TDD UL-DL configurations (configuration 1, 2, and 6). This segmentation allows each configuration to have optimized timing parameters without affecting other configurations, thereby managing complexity through structured division while enabling enhanced uplink transmission in special subframes.
2Productivity
If HARQ operations are supported in special subframes, then resource utilization is improved, but compatibility requirements and configuration constraints increase
Solution Approach 1:
The patent achieves universality by designing a standardized HARQ operation framework that can function across multiple TDD UL-DL configurations (1, 2, and 6). The same basic HARQ timing relationship definition mechanism is applied universally, with configuration-specific parameters selected from predefined sets, allowing the system to maintain compatibility while supporting enhanced functionality across different deployment scenarios.
Data Source
AI summary
Provided is a method of transmitting a Physical Uplink Shared Channel (PUSCH) in a special subframe by a User Equipment (UE). The method includes receiving an Uplink (UL) grant from a base station, the UL grant being included in a downlink time period of Time Division Duplex (TDD) cell, wherein the TDD cell having TDD UL/DL configuration 1, 2 or 6; determining a resource in an Uplink Pilot Time Slot (UpPTS) of a special subframe of the TDD cell to transmit a PUSCH associated with the received UL grant, wherein the special subframe, having subframe number 1 or 6, consists of a Downlink Pilot Time Slot (DwPTS), a guard period (GP), and the UpPTS; transmitting, from the UE, the PUSCH mapped to the resource in the UpPTS; and receiving a Physical Hybrid Automatic Repeat Request Indicator Channel (PHICH) responsive to the PUSCH.