Full-Duplex Discovery Bursts for Faster Random Access
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in accessing shared radio frequency spectrum bands due to half-duplex operations, leading to increased latency and reduced resource utilization during discovery bursts.
Innovation Solution
Implementing full duplex operations to extend the transmission duration of discovery bursts to include random access occasions, allowing user equipment to transmit random access messages during the transmission duration, and indicating the duplex operation mode and channel access procedure through the discovery burst.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If half-duplex operations are used for discovery bursts, then the transmission duration is extended to include random access occasions, but the resource utilization and communication efficiency are reduced
Solution Approach 1:
The patent applies dynamics by transitioning from static half-duplex operation to dynamic full-duplex operation. The network entity dynamically enables full-duplex mode during discovery burst transmission, allowing simultaneous uplink and downlink communications. This dynamic operation mode resolves the contradiction by extending transmission duration while maintaining high resource utilization through concurrent transmissions.
Solution Approach 2:
The patent merges the discovery burst transmission with random access occasions within the same time window. By combining these functions into a single integrated transmission period, the system achieves extended transmission duration without proportionally increasing the time required for separate procedures, thereby maintaining resource utilization efficiency.
2Device complexity
If half-duplex operations are used, then the system is simpler to implement, but the latency increases and communication efficiency decreases
Solution Approach 1:
The system dynamically switches to full-duplex mode during critical transmission periods (discovery bursts and random access occasions) while maintaining simpler half-duplex operation during other periods. This selective dynamic operation reduces latency when needed without permanently increasing system complexity, resolving the contradiction between simplicity and performance.
Solution Approach 2:
The patent applies preliminary action by having the network entity indicate the duplex operation mode and channel access procedure type in advance through discovery burst signaling. This提前 indication allows user equipment to prepare for full-duplex operation, reducing the time required for mode switching and protocol execution, thereby reducing overall latency without requiring complex real-time decision-making.
3Productivity
If full duplex operations are implemented, then resource utilization and random access efficiency are enhanced, but the channel access procedure complexity increases
Solution Approach 1:
The network entity performs preliminary action by indicating the type of channel access procedure (e.g., Type-1 or Type-2 LBT) in advance through discovery burst signaling. This提前 specification allows user equipment to pre-configure the appropriate access procedure, reducing the complexity of real-time channel access decisions while maintaining high random access efficiency in full-duplex mode.
Solution Approach 2:
The patent applies parameter changes by configuring different channel access procedure types (e.g., changing LBT parameters, timing parameters, and access control parameters) based on the indicated duplex mode and procedure type. These parameter adjustments enable efficient full-duplex operation without requiring fundamentally new procedures, thus managing complexity through parameter optimization rather than procedural complexity.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a discovery burst from a network entity during the transmission duration. The received discovery burst may indicate a duplex operation mode used at the network entity for transmission of the discovery burst and a type of channel access procedure associated with a random access occasion included in the transmission duration. The UE may transmit a random access message to the network entity during the random access occasion based on a success of a channel access procedure. The channel access procedure may correspond to the indicated type of channel access procedure.