Sidelink Communication With Fixed Frame Periods for Channel Coordination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems lack efficient techniques for configuring frame structures and channel access procedures in shared radio frequency spectra, particularly in FBE mode, leading to inefficiencies in sidelink communications.
Innovation Solution
Implementing fixed frame periods (FFPs) for sidelink communications, where UEs determine channel access based on monitoring shared channels during previous FFPs or receive indications, allowing coordinated channel access and occupancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If UEs initiate channel access procedures independently in shared spectrum, then each UE can access the channel autonomously, but channel access becomes uncoordinated leading to collisions and reduced communication efficiency
Solution Approach 1:
The patent implements fixed frame periods (FFPs) that periodically structure channel access opportunities. UEs are configured with specific FFPs during which they can initiate channel access procedures, creating a periodic rhythm to otherwise random access attempts. This periodic structuring reduces collisions while maintaining autonomous UE operation, as UEs know when to expect channel access opportunities without continuous network coordination.
2Productivity
If UEs monitor shared channels during previous FFPs to determine channel access, then channel access coordination improves, but the complexity of determining whether to initiate channel access increases
Solution Approach 1:
The patent employs preliminary monitoring during previous fixed frame periods to gather channel occupancy information before making channel access decisions. UEs monitor the shared channel during designated FFPs to detect transmissions from other UEs, then use this preliminary information to determine whether to initiate channel access procedures in subsequent FFPs. This advance monitoring reduces conflicts while providing structured decision-making guidance.
Solution Approach 2:
The patent implements feedback mechanisms where UEs detect transmissions from other UEs during monitoring FFPs and adjust their channel access behavior accordingly. If a UE detects another UE's transmission during a previous FFP, it uses this feedback information to determine whether to defer or proceed with channel access in the current FFP. This feedback loop enables coordinated access while maintaining relative simplicity in UE implementation.
3Productivity
If FFPs are configured for sidelink communications, then channel access becomes more organized, but the flexibility in accessing the shared channel at any time is reduced
Solution Approach 1:
The patent implements dynamic behavior within the structured FFP framework. While FFPs provide a fixed periodic structure for channel access opportunities, UEs dynamically adjust their access decisions based on real-time channel conditions and monitoring results from previous FFPs. The system combines the organizational benefits of fixed periodic opportunities with the flexibility of adaptive decision-making, allowing UEs to respond to changing channel conditions while operating within the FFP structure.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may be configured with a timing of a frame structure for sidelink communications via a shared channel. The timing of the frame structure may correspond to a fixed frame period (FFP), and the first UE may initiate sidelink communications at the boundaries of the FFPs. The first UE may also support techniques for determining whether to initiate a channel access procedure to occupy a shared channel during a first FFP. In one example, the first UE may determine whether to initiate the channel access procedure to occupy the shared channel during the first FFP based on monitoring the shared channel during a second FFP for a sidelink transmission from a second UE. In another example, the first UE may receive an indication of whether to initiate the channel access procedure during the first FFP.