Uplink Scheduling in TDD FeNB-IoT Networks
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing resource allocation and scheduling for time-division duplexing (TDD) operations, particularly in scenarios where paired spectrum blocks are not available, leading to difficulties in optimizing uplink and downlink subframes in wireless networks like 3GPP, 5G, and NR networks.
Innovation Solution
The implementation of advanced communication circuitry and network configurations that allow for dynamic allocation of resources and scheduling of transmissions based on specific TDD configurations, including the use of system information blocks and narrowband physical channels to determine subframe configurations and uplink scheduling delays, enabling efficient TDD operation in various wireless networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If TDD operation is implemented with unpaired spectrum blocks, then spectrum utilization is improved, but resource allocation and scheduling becomes complex
Solution Approach 1:
The patent segments the unpaired spectrum into separate uplink and downlink frequency ranges that can be independently configured. The base station divides the available spectrum into a first uplink frequency range and a second downlink frequency range, allowing flexible allocation of resources in each direction without requiring paired spectrum, thus simplifying the scheduling complexity while maintaining high spectrum utilization.
2Productivity
If dynamic resource allocation is implemented for TDD, then transmission efficiency is improved, but system complexity increases
Solution Approach 1:
The patent implements dynamic resource allocation by allowing the base station to flexibly assign uplink and downlink subframes within the TDD frame structure. The system can dynamically adjust the timing and frequency resources for uplink and downlink transmissions based on traffic demands, improving transmission efficiency while managing system complexity through structured dynamic configuration.
3Reliability
If uplink and downlink subframes are optimized separately, then communication performance is improved, but scheduling difficulty increases
Solution Approach 1:
The patent creates a unified TDD frame structure that simultaneously handles both uplink and downlink communications. The base station configures a common frame structure where uplink subframes use the first frequency range and downlink subframes use the second frequency range, allowing separate optimization of uplink and downlink performance while maintaining a single schedulable system that reduces scheduling difficulty.
Data Source
AI summary
Embodiments of a User Equipment (UE), generation Node-B (gNB) and methods of communication are generally described herein. The UE may receive a narrowband physical downlink control channel (NPDCCH) that includes an uplink scheduling parameter. The UE may determine an uplink scheduling delay for transmission of a narrowband physical uplink shared channel (NPUSCH) in accordance with time-division duplexing (TDD). The uplink scheduling delay may be based on a sum of a predetermined first number of subframes and a variable second number of subframes. The second number of subframes may be based on a window of variable size that starts when the first number of subframes has elapsed since reception of the NPDCCH, and ends when a number of uplink subframes has elapsed since the start of the window. The number of uplink subframes may be indicated by the uplink scheduling parameter.