Autonomous Uplink Transmission in Shared Spectrum
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in sharing a shared frequency spectrum among multiple network operating entities due to high latency and resource wastage in medium-sensing procedures, particularly for autonomous communications that require strict latency requirements.
Innovation Solution
Implementing a priority-based coordinated access scheme with dedicated resources within transmission opportunities (TXOPs) for uplink autonomous transmissions, allowing simultaneous transmissions and opportunistic access without prior reservations, and using interference management to optimize resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If medium-sensing procedures (e.g., listen-before-talk) are used to share spectrum among multiple network operating entities, then interference between different devices is avoided, but signaling overhead increases and latency increases
Solution Approach 1:
The patent applies preliminary action by performing medium sensing and obtaining channel access rights in advance before autonomous uplink transmission is needed. The terminal device senses the medium during downlink reception and stores the obtained channel access rights for later use, eliminating the need for real-time sensing when actual transmission occurs. This resolves the contradiction by preparing interference avoidance measures beforehand, allowing immediate transmission without additional sensing latency.
2Productivity
If priority-based coordinated access scheme with time-division multiplexing is used for spectrum sharing, then resource allocation is improved, but latency requirements for time-critical autonomous communication cannot be met
Solution Approach 1:
The patent applies segmentation by dividing the channel access rights into different priority levels (first priority for autonomous uplink transmission, second priority for other transmissions). This segmentation allows autonomous communication to immediately utilize the channel when needed while other transmissions operate according to the TDM schedule, resolving the contradiction by creating separate access pathways that maintain both efficiency and low latency for time-critical traffic.
Solution Approach 2:
The patent applies dynamics by making the channel access mechanism adaptive rather than rigid. Instead of fixed TDM slots, the system dynamically allocates channel access rights based on real-time conditions and priority levels. The terminal device can immediately transmit autonomous uplink data when channel access is granted, while other transmissions adapt to available opportunities, resolving the contradiction between structured resource allocation and flexible low-latency access.
3Ease of operation
If reserved resources are allocated for autonomous communication in each transmission opportunity, then autonomous transmission can occur without prior reservation, but resource overhead increases
Solution Approach 1:
The patent applies universality by making the same channel access mechanism serve multiple functions: it enables both autonomous uplink transmission and regular scheduled transmissions without requiring separate dedicated resources. The channel access rights obtained through medium sensing are universally applicable to different transmission types based on priority levels, resolving the contradiction by eliminating the need for separate reserved resources while maintaining autonomous transmission capability.
Data Source
AI summary
Wireless communications systems and methods related to autonomous uplink transmission in a shared spectrum are provided. A first wireless communication device identifies a transmission opportunity (TXOP) in a shared spectrum shared by the plurality of network operating entities. The first wireless communication device is associated with a first network operating entity of the plurality of network operating entities. The first wireless communication device identifies a resource in the TXOP designated for autonomous communication. The first wireless communication device communicates autonomous data with a second wireless communication device associated with the first network operating entity during the TXOP using the resource.