HD-FDD Terminal Prioritization for DL-UL Signal Collisions
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Solution Overview
Problem
The challenge of establishing communication when channels collide in a wireless communication system, particularly for RedCap UEs supporting HD-FDD, where DL and UL signals are on different carriers and cannot be transmitted simultaneously, necessitates defining processes for DL-UL channel collisions and intra-UE prioritization.
Innovation Solution
A terminal equipped with a communication unit for half-duplex frequency division duplex and a control unit to determine the order of processes for resolving signal overlaps, including a first process for DL and UL overlaps and a second process for multiple UL overlaps, enabling the terminal to prioritize and manage signal transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If RedCap UE supports HD-FDD with DL and UL on different carriers, then device complexity is reduced, but channel collision occurs when DL and UL signals overlap in time domain
Solution Approach 1:
The patent applies preliminary action by determining the execution order of collision resolution processes in advance. The terminal pre-establishes that the first process (DL-UL collision resolution) is executed before the second process (UL-UL collision resolution), preventing channel collision issues before they occur during signal transmission.
2Productivity
If DL and UL signals are transmitted simultaneously on different carriers, then communication efficiency is improved, but channel collision occurs requiring additional collision resolution processes
Solution Approach 1:
The patent segments the collision resolution into two distinct processes: the first process handles DL-UL signal collisions, and the second process handles UL-UL signal collisions. This segmentation allows each process to be optimized independently and executed in a predetermined order, managing complexity while maintaining communication efficiency.
Solution Approach 2:
The terminal determines in advance that the first process shall be executed before the second process. This preliminary determination of execution order prevents channel collision issues before they occur during signal transmission, resolving the contradiction between communication efficiency and process complexity.
3Quantity of substance
If multiple UL signals overlap in time domain, then uplink communication capacity is increased, but signal prioritization becomes necessary to determine which signal to transmit
Solution Approach 1:
The patent applies preliminary action by pre-determining the execution order of collision resolution processes. The terminal establishes that the first process (DL-UL collision resolution) is executed before the second process (UL-UL collision resolution with signal prioritization), making the complex signal prioritization operation straightforward through predetermined sequencing.
Data Source
AI summary
A terminal includes a communication unit configured to perform communication based on half-duplex frequency division duplex; and a control unit configured to perform a first process and a second process, the first process being performed to determine a signal to receive or a signal to transmit when a downlink signal and an uplink signal overlap in a time domain during the communication, and the second process being performed to determine the signal to transmit when a plurality of uplink signals overlap in the time domain during the communication. In this terminal, the control unit determines whether to perform the first process or the second process first, and the communication unit receives or transmits a signal that is obtained based on a result of performing at least one of the first process and the second process.