Half-Duplex LTE-NR Scheduling with CBR-Based Transmission Priority
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing concurrent transmissions and prioritizations between LTE and NR communications, particularly in half-duplex systems, and in handling overlaps with dedicated short-range communications (DSRC) without causing interference.
Innovation Solution
Implementing joint scheduling rules and channel busy ratio (CBR) based prioritization for LTE and NR communications, and identifying overlaps with DSRC transmissions to determine transmission priorities, using processors and memory in user equipment (UE) to manage concurrent transmissions effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If joint scheduling rules are implemented for LTE and NR communications in half-duplex systems, then transmission reliability is improved by reducing dropped communications, but system complexity increases due to additional arbitration mechanisms
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting scheduling parameters based on channel conditions. Specifically, the system monitors channel busy ratio (CBR) and adjusts transmission parameters such as time resource allocation and frequency resource selection to optimize performance under half-duplex constraints, thereby improving reliability without requiring complex structural changes
Solution Approach 2:
The patent implements preliminary action through advance scheduling decisions. The joint scheduling mechanism pre-determines transmission time slots and resource allocation for both LTE and NR communications before potential conflicts occur. This proactive resource reservation prevents transmission drops by ensuring that half-duplex constraints are respected in advance, improving reliability while keeping the arbitration logic manageable
2Productivity
If time division multiplexing is used to optimize concurrent transmissions, then resource allocation efficiency is improved, but transmission time increases due to sequential resource usage
Solution Approach 1:
The patent applies periodic action through structured time division multiplexing patterns. Transmission resources are allocated in periodic time slots where LTE and NR communications are sequentially scheduled according to predetermined patterns. This periodic structure improves resource allocation efficiency by systematically alternating between technologies while minimizing idle time, and the regular pattern helps predict and optimize total transmission time
Solution Approach 2:
The patent implements dynamics by making the time division multiplexing configuration adaptable. The scheduling system can dynamically adjust the time slot allocation, duration, and switching points based on traffic conditions and channel quality. This dynamic adjustment optimizes resource allocation efficiency for varying loads while minimizing transmission time by adapting to real-time requirements rather than using fixed patterns
3Reliability
If channel busy ratio monitoring is implemented for transmission prioritization, then communication reliability is improved by reducing dropped packets, but measurement and detection complexity increases
Solution Approach 1:
The patent applies self-service by having the system monitor its own channel conditions using existing physical layer measurements. The channel busy ratio is derived from standard signal strength measurements (such as RSRP or RSSI) that are already performed for other purposes like link adaptation and handover decisions. This approach improves communication reliability through accurate channel awareness without adding separate complex measurement mechanisms, as the monitoring leverages existing self-service measurement capabilities
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may obtain one or more joint scheduling rules associated with Long Term Evolution (LIE) communications and New Radio (NR) communications in a half-duplex communication system. The UE may identify a channel busy ratio (CBR) associated with the half-duplex communication system. The UE may prioritize an LTE communication or an NR communication based at least in part on the one or more joint scheduling rules and the CBR. Numerous other aspects are described.