Uplink Scheduling in Unlicensed Bands for NR Coexistence
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting uplink signals in unlicensed bands, particularly in coexisting with other wireless communication systems like WiGig, due to limitations in bandwidth matching and channel access procedures.
Innovation Solution
The method involves matching the uplink/downlink band scheduling with the bandwidth of a channel supported by a different wireless communication system, such as WiGig, to enable coexistence and reducing the amount of information needed for scheduling, allowing for additional information to be provided by the base station to the User Equipment (UE).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the uplink/downlink band scheduling is matched with the bandwidth of a channel supported by a different wireless communication system (e.g., WiGig), then coexistence between NR systems and other wireless communication systems is supported, but the scheduling complexity increases due to bandwidth matching requirements
Solution Approach 1:
The patent segments the scheduling information by dividing it into essential parameters needed for uplink transmission and optional parameters that can be omitted. The base station transmits only the necessary scheduling parameters in the downlink control information, reducing the overall scheduling complexity while maintaining coexistence capabilities through selective parameter inclusion based on the specific communication scenario
Solution Approach 2:
The patent extracts and removes unnecessary scheduling parameters from the downlink control information when transmitting to user equipment. By identifying and eliminating redundant parameters that are not required for the specific uplink transmission scenario, the scheduling overhead is reduced while the essential bandwidth matching functionality for coexistence is preserved
2Quantity of substance
If the amount of information for scheduling of uplink transmission is reduced, then additional information can be provided by the base station to the UE, but the precision of scheduling control may be compromised
Solution Approach 1:
The patent applies local quality by providing different levels of scheduling information precision based on the specific transmission scenario. Essential parameters that directly impact uplink transmission quality are maintained with high precision, while less critical parameters are either omitted or provided with reduced precision, achieving an optimal balance between information quantity and control precision
Solution Approach 2:
The patent implements partial action by transmitting only the necessary subset of scheduling parameters rather than complete scheduling information. The base station provides just enough information for the UE to perform uplink transmission, avoiding the transmission of excessive information that would increase overhead without providing proportional benefits to transmission precision
Data Source
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AI summary
Disclosed are a method for transmitting/receiving a signal between a terminal and a base station in a wireless communication system for supporting an unlicensed band, and a device for supporting the same. More particularly, a terminal according to one embodiment of the present disclosure can receive a downlink signal through an unlicensed band on the basis of downlink scheduling information of a received component carrier level, or can transmit an uplink signal through the unlicensed band on the basis of uplink scheduling information of a broadband channel level including a plurality of received component carriers.