NB-IoT TDD Signal Transmission Guard Period Resource Allocation
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Solution Overview
Problem
In wireless communication systems supporting Narrowband Internet of Things (NB-IoT), there is a need for an optimized method to transmit and receive signals between terminals and base stations in Time Division Duplex (TDD) systems, particularly to efficiently utilize resources and minimize interference with existing LTE systems, while reducing bandwidth costs.
Innovation Solution
The method involves receiving allocation information indicating downlink and uplink regions, including a guard period, and utilizing these regions for signal transmission and reception, with the option to allocate additional resources dynamically based on terminal characteristics, such as NB-IoT mode or coverage enhancement levels, to optimize resource usage and interference management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bandwidth is reduced to lower cost, then communication cost is reduced, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent implements dynamic resource allocation by allowing NB-IoT terminals to flexibly use resources in the guard period based on their characteristics and coverage enhancement levels. The base station dynamically assigns additional downlink or uplink resources within the guard period, enabling the system to adapt resource utilization to actual needs rather than maintaining a fixed narrowband allocation, thus improving resource utilization efficiency while maintaining cost-effectiveness
Solution Approach 2:
The patent changes the parameter of resource allocation by extending NB-IoT terminal access into the guard period, which traditionally serves only as a transition interval. By modifying the time-domain resource structure to allow data transmission in the guard period under specific conditions, the system increases available resources without requiring additional bandwidth, thereby improving resource utilization while maintaining cost benefits
2Productivity
If guard period resources are utilized for additional transmission, then resource utilization efficiency is improved, but interference with LTE terminals may increase
Solution Approach 1:
The patent applies local quality by differentiating resource allocation based on terminal type and location. NB-IoT terminals in coverage enhancement modes are specifically permitted to use guard period resources, while other terminals maintain traditional allocations. The base station selectively assigns guard period resources to specific NB-IoT terminals based on their characteristics, creating localized optimized resource usage that improves efficiency without causing widespread interference
Solution Approach 2:
The patent implements feedback mechanisms where the base station monitors terminal characteristics, coverage enhancement levels, and channel conditions to dynamically adjust guard period resource allocation. The base station receives information about terminal needs and system state, then adjusts resource assignment accordingly, allowing the system to optimize resource utilization while maintaining interference levels within acceptable thresholds through continuous adaptation
3Productivity
If resource allocation is made flexible based on terminal characteristics, then signal transmission efficiency is improved, but system complexity increases
Solution Approach 1:
The patent segments the resource allocation process into distinct components: basic resource allocation following traditional protocols, and optional guard period resource allocation for specific NB-IoT terminals. This segmentation allows the system to maintain simple traditional operations for most cases while enabling enhanced flexible allocation only where needed, thereby improving signal transmission efficiency for targeted terminals without significantly increasing overall system complexity
Solution Approach 2:
The patent creates a universal resource allocation framework that handles both traditional and enhanced scenarios through a single system. The base station and terminals are designed to support both conventional resource allocation and guard period utilization, allowing the same infrastructure to serve multiple purposes - maintaining backward compatibility while enabling improved signal transmission efficiency through flexible resource use when conditions permit
Data Source
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AI summary
Disclosed are a signal transmission/reception method between a terminal and a base station in a wireless communication system supporting narrowband Internet of Things (NB-IoT), and a device supporting same. More specifically, disclosed is a description of a signal transmission/reception method between a terminal and a base station when a wireless communication system supporting NB-IoT is a time division duplex (TDD) system.