Uplink Signal Transmission with Mixed TTI Symbol Segmentation
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Solution Overview
Problem
Current wireless communication systems face challenges in ensuring high reliability for uplink signal transmission between base stations and user equipment when different Transmission Time Intervals (TTIs) are applied, leading to interference and reduced efficiency in coexistence scenarios.
Innovation Solution
The proposed method involves a User Equipment (UE) receiving an uplink grant scheduling signal and transmitting Demodulation Reference Signals (DM-RS), Physical Uplink Control Channel (PUCCH), and Physical Uplink Shared Channel (PUSCH) using different symbols based on a specific TTI structure, with options for puncturing or rate-matching, allowing coexistence with other UEs using different TTIs on the same resource.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If different TTIs are applied to multiple UEs transmitting on the same resource, then system capacity and resource utilization are improved, but interference and reliability of signal transmission deteriorate
Solution Approach 1:
The patent segments the uplink transmission resources by dividing them into different symbol positions within a TTI. UEs with different TTI configurations are assigned to transmit in different symbols, thereby segmenting the previously conflicting resource usage into non-overlapping time slots. This allows multiple UEs to share the same frequency resource without interference, improving system capacity while maintaining signal reliability.
Solution Approach 2:
The patent implements dynamic resource allocation by allowing the base station to flexibly assign different symbol positions for uplink transmission based on the TTI configuration of each UE. The scheduling is adaptive, where the base station dynamically determines which symbols are available for each UE's uplink channels (PUCCH, PUSCH, DM-RS) based on their respective TTI lengths, enabling efficient coexistence of different TTI types without fixed rigid allocations.
2Adaptability or versatility
If different TTIs are applied to multiple UEs, then adaptability and service diversity are improved, but device complexity and scheduling difficulty increase
Solution Approach 1:
The patent simplifies scheduling complexity by segmenting the time domain into distinct symbol regions assigned to different TTI configurations. Instead of managing complex overlapping transmissions, the base station schedules UEs in separated symbol positions, transforming a complex scheduling problem into a simpler resource allocation task where each UE has dedicated symbol slots for their uplink transmissions.
Solution Approach 2:
The patent applies local quality by tailoring the resource allocation to each UE's specific TTI requirements. Each UE receives customized symbol assignments based on its TTI configuration, allowing short TTI UEs to use earlier symbols and long TTI UEs to use later symbols, thereby optimizing each UE's transmission characteristics while simplifying overall system management through localized resource customization.
Data Source
AI summary
Disclosed are a method for transmitting/receiving an uplink signal between a base station and a terminal, and a device for supporting the same. More specifically, disclosed are a method for transmitting/receiving a signal between a terminal and a base station for the coexistence of terminals to which different transmission time intervals (TTIs) are applied when the terminals to which the different TTIs are applied send an uplink signal on the same resource, and a device for supporting the same.