Wireless Resource Allocation via Slot Format Indicators
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently allocating resources to provide various services, such as enhanced mobile broadband (eMBB), ultra-reliable and low-latency communications (URLLC), and massive machine-type communications (mMTC), especially in unlicensed bands, where channel access procedures are complex and resource management is inefficient.
Innovation Solution
A method for determining resource domains in a wireless communication system, where a terminal and base station use configuration information, downlink control information, and slot format indicators to allocate and manage time-frequency resources for uplink data transmission, allowing flexible resource allocation based on channel access procedures and slot format indicators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If channel access procedures are implemented in unlicensed bands to manage various services, then service provision capability is improved, but procedure complexity increases
Solution Approach 1:
The patent segments the unlicensed band resources into multiple slot formats (first slot format for eMBB, second slot format for URLLC/mMTC) and divides channel access procedures into separate contention-based and non-contention-based types. This segmentation allows different services to operate independently with appropriate resource allocation, improving service provision capability while managing complexity through structured division.
Solution Approach 2:
The patent implements dynamic slot format indication where the base station can dynamically indicate which slot format to use for different services through downlink control information. This dynamic adaptation allows the system to flexibly allocate resources based on real-time service requirements, enhancing versatility while maintaining manageable procedure complexity through standardized format switching.
2Adaptability or versatility
If resource allocation is made flexible to support multiple services, then service adaptability is improved, but resource management complexity increases
Solution Approach 1:
The patent applies local quality by assigning different slot formats to different service types within the same unlicensed band. Each service (eMBB, URLLC, mMTC) receives customized resource allocation characteristics appropriate to its requirements, allowing flexible service adaptability while simplifying resource management through service-specific format templates rather than universal complex management.
Solution Approach 2:
The patent creates a universal slot format structure that can serve multiple services through configuration variations. The same basic slot format framework supports different services by adjusting parameters such as resource block allocation, timing, and frequency characteristics, achieving service adaptability without proportionally increasing resource management complexity.
3Adaptability or versatility
If contention-based channel access is used for uplink data transmission, then service flexibility is improved, but access delay increases
Solution Approach 1:
The patent implements dynamic channel access mode selection where terminals can switch between contention-based and non-contention-based access depending on service requirements and channel conditions. This dynamic approach allows low-latency services to use non-contention-based access while maintaining service flexibility for other applications, reducing access delay for time-sensitive traffic.
Solution Approach 2:
The patent applies preliminary action by pre-configuring multiple slot formats and channel access procedures before actual data transmission. Terminals are pre-informed of available formats and access methods through downlink control information, allowing them to prepare and execute transmissions more efficiently, thereby reducing access delay while maintaining service flexibility.
Data Source
AI summary
The present disclosure provides a method of performing communication according to an allocated resource domain in a wireless communication system, wherein the method includes: obtaining configuration information for control channel and data channel transmission and reception; obtaining downlink control information (DCI) including physical uplink shared channel (PUSCH) transmission slot scheduling information and at least one slot format indicator corresponding to a plurality of PUSCH transmission slots, based on the configuration information; identifying the plurality of PUSCH transmission slots based on the DCI; determining a resource domain allocated for transmission of uplink data in the plurality of PUSCH transmission slots, by using at least one of the at least one slot format indicator and the DCI; and transmitting the uplink data by using the determined resource domain.