Uplink Control Signaling Recovery Under Resource Preemption
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Solution Overview
Problem
Existing wireless communication systems face challenges in maintaining ultra-high reliability and ultra-low-latency transmissions due to the preemption of uplink transmission resources, leading to inefficiencies in downlink data transmission and loss of uplink control information (UCI), particularly in scenarios where high-priority services preempt lower-priority services.
Innovation Solution
Implementing methods to restore UCI transmission by reallocating resources, multiplexing UCI on different channels, and adjusting power control parameters to ensure reliable transmission of high-priority services, while canceling or reducing transmission power for lower-priority services to avoid performance degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uplink transmission resources are preempted by high-priority services, then high-priority service transmission reliability is improved, but uplink control information transmission is lost and downlink data transmission efficiency deteriorates
Solution Approach 1:
The patent segments the uplink transmission resource into multiple parts: the original resource allocated for UCI transmission, and alternative resources (another uplink resource or downlink resource) that can be used as backup. When the original resource is preempted, the UCI is transmitted on the segmented alternative resource instead, preventing information loss while allowing the original resource to be fully utilized by high-priority services.
Solution Approach 2:
The patent establishes preliminary arrangements by pre-configuring alternative uplink resources and downlink resources that can serve as backup channels for UCI transmission. These alternative resources are prepared in advance and can be immediately activated when resource preemption occurs, ensuring continuous UCI transmission capability without interrupting high-priority service transmission.
2Reliability
If uplink transmission resources are preempted by high-priority services, then high-priority service transmission reliability is improved, but downlink data transmission efficiency deteriorates
Solution Approach 1:
The patent transitions from a single uplink dimension to multiple dimensions by introducing downlink resources as an alternative transmission channel for UCI. When uplink resources are preempted, the system switches to using downlink resources (a different dimension) to carry the UCI, thereby maintaining uplink control functionality while preserving uplink resource availability for high-priority services, which in turn maintains downlink data transmission efficiency.
3Reliability
If transmission power is adjusted to ensure high-priority service quality, then high-priority service reliability is improved, but overall system power efficiency deteriorates
Solution Approach 1:
The patent applies local quality by adjusting transmission power specifically for the UCI transmission on alternative resources rather than uniformly increasing power across all transmissions. The power control parameters are locally optimized for the backup transmission path, ensuring sufficient quality for UCI delivery while avoiding unnecessary power consumption in other transmission channels, thus maintaining overall system power efficiency.
Data Source
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AI summary
Systems and methods for wireless communications are disclosed herein. In one embodiment, a wireless communication device determines that transmission of uplink control information (UCI) on at least a portion of a first uplink resource is canceled. In response to determining that the transmission of the UCI on the first resource is canceled, the wireless communication device determines a second uplink resource for transmitting the UCI. The wireless communication device transmits the UCI on the second uplink resource.