NB-IoT Resource Reservation With Dynamic DCI Collision Avoidance
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Solution Overview
Problem
Current wireless communication systems face challenges in managing the coexistence of narrowband Internet of Things (NB IoT) and LTE or New Radio (NR) communications, leading to potential collisions and reduced spectral efficiency.
Innovation Solution
Implementing resource reservation mechanisms using higher layer signaling and dynamic DCI signaling to allocate and dynamically indicate available resources for NB IoT transmissions, ensuring they do not overlap with LTE or NR, while preserving spectral efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resource reservation mechanisms are implemented to prevent collisions between NB IoT and LTE/NR communications, then coexistence reliability is improved, but system complexity increases due to additional signaling overhead
Solution Approach 1:
The patent applies preliminary action by configuring resource reservations in advance through higher layer signaling (RRC configuration) before actual collisions occur. The network pre-allocates specific time-frequency resources for NB IoT communications, ensuring that these resources are reserved and cannot be used by LTE or NR transmissions, thereby preventing collisions before they happen.
Solution Approach 2:
The patent implements dynamics by introducing dynamic indication mechanisms that allow the network to flexibly adjust resource availability in real-time. Through downlink control information (DCI) or physical layer signaling, the system can dynamically indicate whether pre-configured reserved resources are actually available for NB IoT use, allowing adaptive response to changing network conditions and traffic demands.
2Productivity
If dynamic indication mechanisms are used to flexibly allocate NB IoT resources, then resource utilization efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent applies partial action by implementing dynamic indication only for specific reserved resources that require flexibility, rather than dynamically signaling all resources. The system maintains a pool of pre-configured reserved resources through higher layer signaling, and only uses dynamic indication mechanisms when specific resources need to be temporarily reclaimed or adjusted, thereby reducing overall signaling overhead while maintaining flexibility where needed.
Solution Approach 2:
The patent utilizes parameter changes by encoding resource availability information in efficient formats within downlink control information. The system changes the state parameters of reserved resources (from reserved to available or vice versa) through compact signaling mechanisms, allowing the network to convey resource status changes with minimal overhead while maintaining the ability to respond to varying traffic conditions.
3Reliability
If time-frequency resources are reserved for NB IoT to prevent collisions with LTE/NR, then communication reliability is improved, but spectral efficiency deteriorates due to dedicated resource allocation
Solution Approach 1:
The patent applies dynamics by making reserved resources dynamically configurable rather than permanently dedicated. The network can adjust the reservation status of time-frequency resources based on real-time traffic conditions, allowing reserved resources to be temporarily released for LTE or NR use when NB IoT traffic is light, thereby improving overall spectral efficiency while maintaining reliability when needed.
Solution Approach 2:
The patent utilizes parameter changes by allowing the reservation configuration parameters to be modified through higher layer signaling. The system can change the time-frequency resource allocation parameters for NB IoT reservations, adjusting the amount and location of reserved resources based on network conditions, traffic patterns, and service requirements, thus optimizing the balance between reliability and spectral efficiency.
Data Source
AI summary
A method includes receiving a higher layer message including reservation information for time domain network resources available for communicating with the plurality of wireless communication protocols; receiving a dynamically signaled message including a reservation indicator of a reservation status of a time domain network resource from the time domain network resources for communicating using a wireless communication protocol; and communicating using machine to machine communications over the wireless communication protocol, the communicating occurring over an available time domain network resource from the time domain network resources.