Coordinated Unlicensed Spectrum Transmission via Operator Agreements
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Solution Overview
Problem
The unpredictable nature of accessing unlicensed radio frequency spectrum bands makes data transmission over these bands unpredictable, especially for multicast-broadcast and emergency transmissions, due to the unreliable availability of channels.
Innovation Solution
Implementing coordinated transmission techniques between operators, where data is transmitted in accordance with an agreement, using clear channel assessment (CCA) and synchronization protocols to ensure efficient use of the unlicensed spectrum, allowing for opportunistic and predefined data transmission based on access and transmission status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If operators independently access unlicensed bands using LBT procedures, then each operator can transmit data when the channel is available, but the transmission becomes unpredictable and unreliable due to channel unavailability
Solution Approach 1:
The patent merges transmission resources and coordination mechanisms between operators. Operators share unlicensed band access through coordinated LBT procedures and joint transmission agreements, combining their individual access attempts into a unified coordination framework that improves reliability while maintaining efficiency.
Solution Approach 2:
The patent implements preliminary coordination between operators before actual data transmission. Operators perform advance agreements on transmission parameters, coordinate their LBT timing, and establish transmission schedules beforehand, which eliminates the unpredictability of independent access while preserving channel availability.
2Reliability
If operators coordinate transmission according to an agreement, then transmission reliability improves through coordinated access, but the system complexity increases due to coordination overhead
Solution Approach 1:
The patent creates universal coordination mechanisms that serve multiple functions simultaneously. The coordination system handles both LBT synchronization and transmission scheduling, and the agreement framework manages both resource allocation and conflict resolution, reducing overall system complexity through multi-functional integration.
Solution Approach 2:
The patent changes key parameters from operator-specific to coordinated values. Transmission timing, power levels, and resource allocation parameters are transformed from independent decisions to coordinated parameters defined by the agreement, simplifying the coordination overhead through standardized parameter management.
3Speed
If operators transmit data independently whenever the channel is available, then data transmission speed is maximized, but duplicate transmissions occur reducing overall efficiency
Solution Approach 1:
The patent implements feedback mechanisms where operators monitor each other's transmission status and adjust their own transmissions accordingly. The coordination agreement includes feedback loops that detect duplicate transmission attempts and trigger retransmission coordination, maintaining high speed while eliminating wasteful duplicate transmissions.
Solution Approach 2:
The patent introduces dynamic transmission coordination where operators can switch between independent and coordinated transmission modes based on channel conditions and agreement status. The system dynamically adjusts transmission behavior to maximize speed when channels are clear while preventing duplicates when multiple operators have access.
Data Source
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AI summary
Techniques are described for wireless communication. A first method includes performing a clear channel assessment (CCA) for a first node associated with a first operator in a deployment of operators over an unlicensed radio frequency spectrum band, and transmitting data over the unlicensed radio frequency spectrum band when the CCA is successful. The data may be transmitted by the first node in accordance with an agreement between the first operator and a second operator in the deployment of operators. A second method includes receiving over an unlicensed radio frequency spectrum band, at a user equipment (UE), a first transmission from a first node associated with a first operator in a deployment of operators. The first transmission may include data originating from a second operator in the deployment of operators.