Repeater Channel Occupancy Initiation in Shared Spectrum
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Solution Overview
Problem
Wireless communication systems face challenges in effectively relaying signals between devices over shared radio frequency spectrum due to limitations in repeater devices' ability to initiate and manage channel occupancy time (COT), leading to inefficiencies in power consumption and communication reliability.
Innovation Solution
A method and apparatus for a repeater device to initiate a channel access procedure, transmit an indication of channel occupancy, and relay communications during a COT, enabling improved communication efficiency and reliability by allowing the repeater to effectively manage channel access and usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If repeater devices are deployed to extend geographic coverage area, then coverage area is extended, but power consumption increases and communication reliability deteriorates due to inability to initiate and manage channel occupancy
Solution Approach 1:
The repeater device is empowered to autonomously initiate channel access procedures and manage channel occupancy time (COT) in shared radio frequency spectrum. The repeater receives control signaling triggering a channel access procedure, performs the procedure itself, transmits an indication of the initiated COT to the base station, and relays communications during the COT. This self-service capability eliminates the repeater's historical inability to manage channel access, thereby improving communication reliability while maintaining extended coverage.
2Area of stationary object
If repeater devices relay communications over shared radio frequency spectrum, then network coverage is extended, but power consumption increases due to inefficient channel access management
Solution Approach 1:
The repeater device autonomously manages channel access by initiating channel access procedures and managing COT in shared spectrum, eliminating the need for continuous base station control and reducing overall network power consumption. The repeater performs LBT procedures, determines COT duration, and coordinates with the base station efficiently, optimizing energy usage while extending network coverage.
Solution Approach 2:
The system dynamically adjusts channel access parameters including COT duration, LBT procedure selection, and transmission power levels based on channel conditions and traffic requirements. The repeater receives control signaling that configures these parameters and adapts its channel access behavior accordingly, improving power efficiency while maintaining coverage extension capabilities.
3Reliability
If repeater devices autonomously manage channel occupancy, then communication reliability improves, but device complexity increases
Solution Approach 1:
The repeater device performs multiple functions including receiving control signaling, performing channel access procedures, transmitting COT indications, and relaying communications. By consolidating these channel access management functions into a single multi-functional unit at the repeater, the system achieves improved reliability without proportionally increasing overall system complexity.
Solution Approach 2:
The repeater acts as an intermediary between the base station and UEs in the extended coverage area. It receives control signaling from the base station, autonomously manages channel access in shared spectrum, and relays communications bidirectionally. This intermediary role simplifies the architecture by localizing channel access management at the repeater rather than requiring complex coordination between base station and multiple UEs.
4Productivity
If repeater devices perform channel access procedures in shared spectrum, then network efficiency improves, but latency increases due to additional channel access steps
Solution Approach 1:
The repeater device performs channel access procedures and establishes COT in advance before actual data transmissions occur. By proactively securing channel access and notifying the base station of the initiated COT, the system prepares the communication path ahead of time, reducing latency for subsequent data transmissions while improving overall network efficiency.
Solution Approach 2:
The repeater maintains continuous communication during the initiated COT by relaying transmissions between the base station and UEs without requiring repeated channel access procedures. This continuous operation during the secured COT period improves network efficiency and reduces latency compared to stop-start channel access patterns.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. For example, a first communication device may receive, from a second communication device, control signaling triggering a channel access procedure at the first communication device. In some case, the channel access procedure may be for accessing the shared radio frequency spectrum. The first communication device may then perform the channel access procedure based on the control signaling. In some examples, the first communication device may, based on the channel access procedure, transmit an indication of a channel occupancy initiated by the first communication device to the second communication device. The first communication device may relay communications between the second communication device and a third communication device during a channel occupancy time (COT) based on the transmitted indication of the channel occupancy initiated by the first communication device.