Logical Channel Restriction by Duplex Mode for Uplink Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in accommodating urgent uplink and downlink transmissions simultaneously due to limitations in time-division duplexing, which restricts transmission opportunities and interferes with full-duplex operations, particularly in full-duplex capable gNBs and UEs.
Innovation Solution
The method involves selecting different uplink transmission parameters based on duplex modes, using distinct logical channel restriction configurations and power control settings for full-duplex and half-duplex operations to manage self-interference and ensure quality of service requirements are met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a UE is configured with multiple uplink logical channels for PUCCH transmission, then uplink communication reliability is improved, but it becomes unclear which logical channel should be used for PUCCH transmission when multiple channels are available
Solution Approach 1:
The patent changes the parameter of logical channel priority by establishing a correspondence between duplex modes (TDD/FDD) and logical channel priorities. The network configures different priority values for different duplex modes, allowing the UE to determine which logical channel to use based on the current duplex mode. This resolves the ambiguity by dynamically adjusting channel parameters based on operating conditions.
2Ease of operation
If PUCCH transmission is restricted to specific logical channels, then transmission ambiguity is resolved, but flexibility in uplink resource allocation is reduced
Solution Approach 1:
The patent implements dynamic restriction of PUCCH transmission to specific logical channels based on the duplex mode. Rather than a fixed restriction, the system dynamically determines which logical channels are eligible for PUCCH transmission depending on whether TDD or FDD mode is active. This provides conditional flexibility while maintaining clear transmission rules.
3Productivity
If the network configures multiple uplink logical channels, then uplink capacity is increased, but UE power consumption increases due to complex channel selection and management
Solution Approach 1:
The patent reduces UE power consumption by changing the parameter of logical channel priority based on duplex mode. Instead of requiring the UE to complexly evaluate multiple channels, the system pre-configures priority parameters that the UE can simply follow based on the current duplex mode. This simplifies UE processing and reduces energy consumption while maintaining multiple uplink channels for increased capacity.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Apparatuses, methods, and systems are disclosed for selecting an uplink transmission parameter based on duplex mode. One apparatus (500) includes a processor (505) and a transceiver (525) that receives (705) a configuration containing first and second sets of LCH restriction configurations. The transceiver (525) receives (710) an uplink resource allocation indicating a set of symbols for an initial PUSCH transmission and the processor (505) generates (715) a TB corresponding to the uplink resource allocation. The TB is generated (715) using the first set of LCH restriction configurations when the set of symbols is operated in a first duplex mode and the TB is generated (715) using the second set of LCH restriction configurations when the set of symbols has at least one symbol indicated as operated in a second duplex mode. The transceiver (525) transmits (720) the generated TB on the allocated uplink resources.