Terminal Uplink Scheduling Around SSB Overlap in 5G XDD
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing interference and resource allocation for various services such as eMBB, mMTC, and URLLC in 5G systems, particularly in TDD systems, which affect coverage and transmission efficiency.
Innovation Solution
The method involves a terminal determining the overlap of uplink and downlink symbol positions with synchronization signal blocks and random access channel occasions in the time domain, using XDD indicators to efficiently transmit and receive signals, thereby optimizing resource usage and enhancing coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink and downlink resources are flexibly divided in time and frequency domains, then resource allocation efficiency is improved, but interference management complexity increases
Solution Approach 1:
The patent segments the time-frequency resource grid into distinct regions for uplink and downlink communications. By dividing the available resources into separate uplink and downlink regions, the system achieves flexible resource allocation while simplifying interference management through spatial and temporal separation of transmit and receive operations.
Solution Approach 2:
The patent introduces an additional dimension of flexibility by enabling dynamic switching between time-division duplexing and frequency-division duplexing modes. This dimensional approach allows the system to adapt resource allocation strategies based on traffic conditions while maintaining manageable interference levels through structured resource partitioning.
2Reliability
If synchronization signal blocks are transmitted in specific time domain positions, then downlink coverage is improved, but uplink transmission opportunities are reduced
Solution Approach 1:
The patent implements dynamic configuration of synchronization signal block positions and uplink resource allocations based on real-time traffic conditions and channel state. By making the resource allocation pattern adaptive rather than fixed, the system can optimize downlink coverage when needed while maximizing uplink opportunities when traffic conditions permit, resolving the contradiction between coverage reliability and transmission productivity.
Solution Approach 2:
The patent employs periodic synchronization signal block transmissions at configured intervals, allowing predictable downlink coverage maintenance while creating regular opportunities for uplink transmissions in between synchronization events. This periodic structure ensures reliable downlink synchronization while systematically providing uplink transmission windows.
3Reliability
If random access channel occasions are configured in time domain, then initial access reliability is improved, but resource utilization efficiency decreases
Solution Approach 1:
The patent applies different resource allocation strategies to different regions of the time-frequency grid, with dedicated random access channel occasions positioned in specific time domains where they provide maximum benefit for initial access. By concentrating access resources in localized regions rather than uniformly distributing them, the system achieves high initial access reliability in critical areas while maintaining efficient resource utilization in other regions.
Data Source
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AI summary
The disclosure relates to a method and apparatus for transmitting and receiving a signal in a wireless communication system. An operating method of a terminal in a wireless communication system includes receiving, from a base station, information related to a position of a symbol in which a synchronization signal block is transmitted in a time domain, determining whether a position of a symbol configured to transmit an uplink signal overlaps the position of the symbol in which the synchronization signal block is transmitted in the time domain, in case that the position of the symbol configured to transmit the uplink signal overlaps the position of the symbol in which the synchronization signal block is transmitted in the time domain, determining whether a time or frequency-division duplexing (XDD)-related indicator is configured or received, and transmitting the uplink signal to the base station, based on a result of the determining whether the XDD-related indicator is configured or received.