Uplink Resource Allocation in Unlicensed Bands
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Solution Overview
Problem
Wireless communication systems supporting unlicensed bands face challenges in efficiently allocating uplink resources and transmitting signals between user equipment and base stations, particularly in adhering to regulatory restrictions.
Innovation Solution
A method for allocating uplink resources in unlicensed bands by transmitting control information to indicate contiguous or non-contiguous interlaces within the system band, allowing user equipment and base stations to transmit and receive signals based on these allocations, utilizing resource indication values to specify the allocated resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink resources are allocated in unlicensed bands, then resource utilization efficiency is improved, but compliance with regulatory restrictions becomes more difficult
Solution Approach 1:
The system band is divided into multiple interlaces, where each interlace consists of non-contiguous resource blocks. This segmentation allows the base station to allocate specific interlaces to user equipment, enabling flexible resource utilization while ensuring that regulatory requirements (such as minimum contiguous resource requirements) are met. The control information indicates one of multiple states, each representing different interlace allocations (contiguous or non-contiguous), thus resolving the contradiction between efficient resource use and regulatory compliance.
2Adaptability or versatility
If multiple interlace states are supported, then resource allocation flexibility is improved, but control information complexity increases
Solution Approach 1:
The system dynamically selects from multiple pre-defined interlace states based on current resource conditions and regulatory requirements. Each state represents a different configuration of contiguous and non-contiguous interlaces. By using dynamic state indication rather than static configuration, the system achieves high allocation flexibility while keeping control information manageable through compact state encoding.
Solution Approach 2:
The control information changes its indicated parameter (interlace state) to reflect different resource allocation scenarios. Instead of transmitting detailed resource block assignments, the system transmits a compact state indicator that refers to pre-agreed interlace configurations, reducing control information overhead while maintaining allocation flexibility.
Data Source
AI summary
A method for transmitting and receiving an uplink signal between a terminal and a base station in a wireless communication system which supports a non-licensed band, and an apparatus for supporting the same are disclosed. Specifically, a specific method in which a base station allocates transmission resources in a non-licensed band to a terminal and the terminal transmits an uplink signal using the allocated transmission resources, and an apparatus for supporting the same are disclosed.