Bandwidth Unit Segmentation for LBT Success in 5G Base Stations
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Solution Overview
Problem
Traditional Listen Before Talk (LBT) mechanisms in communication systems face reduced success probability and performance issues due to rigidly using system bandwidth as the minimum unit, especially in advanced communication systems like 5G, where not all bandwidth is utilized, leading to inefficiencies in unauthorized spectrum resource utilization.
Innovation Solution
The method involves performing LBT processing on bandwidth unit resources with values less than the system bandwidth, selecting successful resources as transmission bandwidth, and using these for downlink and uplink transmissions, allowing for flexible LBT processing types and resource allocation based on access priority and channel state information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If LBT processing is performed by taking the system bandwidth as the minimum unit, then the LBT mechanism is simple to implement, but the success probability of LBT is greatly reduced and system throughput is affected
Solution Approach 1:
The patent segments the system bandwidth into multiple bandwidth units, each smaller than the full system bandwidth. The base station performs LBT processing on these individual bandwidth units independently. This segmentation allows partial bandwidth utilization when only some units are successfully accessed, thereby improving LBT success probability while maintaining implementation simplicity through modular processing.
2Ease of operation
If LBT processing is performed by taking the system bandwidth as the minimum unit, then the implementation is straightforward, but the system throughput and performance are degraded
Solution Approach 1:
The patent divides the system bandwidth into multiple smaller bandwidth units that can be independently accessed. The base station performs LBT processing on each bandwidth unit separately and can utilize successfully accessed units for data transmission. This segmentation enables more flexible bandwidth utilization, improving system throughput while keeping the implementation straightforward through independent processing of each unit.
Solution Approach 2:
Instead of requiring the entire system bandwidth to be successfully accessed for LBT, the patent allows partial bandwidth utilization by successfully accessing individual bandwidth units. This partial action approach enables data transmission on available bandwidth units even when other units are occupied, thereby improving system throughput without complicating the LBT implementation.
3Quantity of substance
If the system bandwidth is increased to meet growing communication demand, then more spectrum resources are utilized, but the LBT success probability is greatly reduced
Solution Approach 1:
The patent segments the increased system bandwidth into multiple smaller bandwidth units. This segmentation allows the base station to perform LBT processing on individual units independently, increasing the probability that at least some units will be successfully accessed even as total bandwidth increases. This enables effective utilization of expanded spectrum resources while maintaining high LBT success probability.
Data Source
AI summary
Disclosed are a downlink transmission method and device, an uplink transmission method and device, a base station, a terminal, and a storage medium. The downlink transmission method includes: LBT processing is performed on at least one bandwidth unit resource, and at least one bandwidth unit resource of bandwidth unit resources on which results of the LBT processing result are successful is selected as a transmission bandwidth resource according to a result of the LBT processing; and a service transmission is performed to a terminal through the transmission bandwidth resource.