Sidelink Resource Reservation via Inter-UE Coordination
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Solution Overview
Problem
Current mobile communication networks face challenges in efficiently managing and optimizing communication protocols across diverse wireless devices and base stations, particularly in supporting multiple technologies and releases, which affects traffic management and resource allocation.
Innovation Solution
The implementation of advanced NR user plane and control plane protocol stacks, along with flexible bandwidth management and carrier aggregation techniques, enables optimized communication by dynamically configuring bandwidth parts, resource allocation, and inter-UE coordination for improved traffic handling and resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If device-to-device communication is enabled for direct data transfer between user equipment, then communication efficiency and network capacity are improved, but resource allocation complexity and interference management difficulty increase
Solution Approach 1:
The base station acts as an intermediary that coordinates resource allocation for device-to-device communications. It assigns dedicated time-frequency resources to communicating devices and manages interference through centralized control, thereby enabling efficient direct communication while avoiding the complexity of distributed resource management.
Solution Approach 2:
Resources for device-to-device communication are pre-configured and allocated by the base station before actual communication occurs. This preliminary resource assignment includes allocating specific resource blocks, configuring power levels, and establishing interference management parameters, which simplifies the communication process during actual operation.
2Productivity
If resource reservation is implemented for future transmissions, then network resource utilization is improved, but resource allocation flexibility and response time to changing conditions deteriorate
Solution Approach 1:
The resource reservation mechanism incorporates dynamic adjustment capabilities where reserved resources can be modified or released based on changing network conditions. The base station continuously monitors channel quality, traffic patterns, and interference levels to adaptively adjust resource allocations, maintaining both utilization efficiency and flexibility.
Solution Approach 2:
A feedback mechanism is implemented where channel quality indicators, interference measurements, and transmission success rates are continuously reported to the base station. This feedback enables the system to adjust resource reservations in real-time, releasing reserved resources when no longer needed and allocating additional resources when demand increases, thus balancing utilization and flexibility.
Data Source
AI summary
A method can include transmitting, by a second wireless device to a first wireless device, sidelink control information (SCI) indicating a request for resource selection by the first wireless device for one or more sidelink communications with the second wireless device. The method can also include transmitting, by the second wireless device to the first wireless device, a medium access control (MAC) control element (CE) indicating a reservation interval for the resource selection by the first wireless device for the one or more sidelink communications with the second wireless device to the first wireless device. The method can further include receiving, by the second wireless device from the first wireless device, a message indicating a set of resources selected by the first wireless device for the one or more sidelink communications.