Shared Spectrum Uplink Retransmission for Deprioritized Grants
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication networks, intra-UE uplink collisions on shared spectrum channels occur due to overlapping uplink grants, leading to deprioritized uplink grants that fail to occupy transmission resources, necessitating effective retransmission strategies.
Innovation Solution
User equipment determines deprioritized uplink grants and performs retransmissions using available grants, prioritizes HARQ process identifiers based on MAC data packet priority, and supports autonomous retransmissions to optimize resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple uplink grants are allocated to user equipment on shared spectrum channels, then transmission capacity and resource utilization are improved, but intra-UE uplink collisions occur causing deprioritized grants to fail transmission
Solution Approach 1:
The system performs preliminary prioritization of uplink grants before transmission by assigning priority levels based on service requirements, QoS parameters, and channel conditions. This preliminary classification enables the UE to identify which grants should be transmitted first, preventing complete transmission failure when collisions occur. The network configures priority indicators in advance, allowing the UE to make deterministic decisions during uplink transmission scheduling.
Solution Approach 2:
The system implements feedback mechanisms where the network monitors transmission outcomes and adjusts grant prioritization dynamically. When deprioritized grants fail transmission, the system receives feedback about the collision and retransmits using available resources. The network can adjust priority configurations based on observed collision patterns, service performance requirements, and spectrum availability, creating a closed-loop system that continuously optimizes transmission reliability.
2Reliability
If deprioritized uplink grants are retransmitted using available grants, then transmission reliability is improved, but additional signaling overhead and processing complexity are introduced
Solution Approach 1:
The network pre-configures priority indicators and retransmission parameters for uplink grants before transmission occurs. This preliminary configuration includes priority levels, allowed retransmission attempts, and resource allocation patterns. By establishing these parameters in advance, the UE's processing complexity during actual transmission is reduced, as the device only needs to follow pre-determined prioritization rules rather than making complex real-time decisions.
Solution Approach 2:
The UE autonomously manages retransmission of deprioritized grants using available uplink resources without requiring explicit network control for each retransmission event. The device applies pre-configured prioritization rules locally to determine which deprioritized grants should be retransmitted and when, reducing signaling overhead. This self-service approach allows the UE to handle retransmissions independently based on local conditions and pre-established policies.
Data Source
AI summary
This disclosure relates to methods and devices for managing transmission or retransmission on shared spectrum channel in a wireless communication network. In one implementation, the method may include determining if an uplink grant is deprioritized by a uplink shared channel transmission on a shared spectrum channel. The method may further include determining if a media access control (MAC) data packet has been generated for the deprioritized uplink grant. The method may further include, in response to the uplink grant being deprioritized and the MAC data packet being generated for the deprioritized uplink grant, performing a retransmission of the MAC data packet with an available uplink grant.