Full-Duplex Control Signaling in Wireless Networks
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Solution Overview
Problem
Current wireless communication networks face inefficiencies in control signaling due to dedicated resource blocks for uplink and downlink communications, leading to delayed and outdated feedback, which affects network throughput and reliability, especially in dynamic traffic environments.
Innovation Solution
Implementing full-duplex communication in wireless networks to allow secondary access for supplemental control information, such as CQI, HARQ feedback, and MIMO feedback, on the same time-frequency resources used for primary access, enabling more frequent and accurate control information exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated resource blocks are used for uplink and downlink control signaling, then communication directionality is maintained, but feedback timeliness and network throughput deteriorate
Solution Approach 1:
The patent merges uplink and downlink control signaling into the same time-frequency resources, allowing bidirectional communication simultaneously. The base station transmits downlink control information while user equipment transmits uplink feedback in the same resource blocks, eliminating the need for separate dedicated resource blocks and thereby improving network throughput and feedback timeliness.
Solution Approach 2:
The patent implements dynamic resource allocation where the base station can flexibly assign time-frequency resources for primary and secondary access based on real-time traffic conditions. This dynamic approach allows the system to adapt to changing network demands and optimize control signaling efficiency in dynamic traffic environments.
2Stability of the object's composition
If dedicated resource blocks are allocated for control signaling, then communication order is maintained, but feedback latency increases
Solution Approach 1:
By combining uplink and downlink control signaling in the same time-frequency resources, the patent enables simultaneous bidirectional communication. The user equipment can transmit feedback information in the same resource blocks where downlink control information is transmitted, significantly reducing feedback latency compared to traditional sequential access methods.
Solution Approach 2:
The patent enables continuous control information exchange by allowing overlapping uplink and downlink transmissions in the same time-frequency resources. This continuous interaction eliminates idle periods between feedback transmission and processing, maintaining steady-state communication efficiency and reducing overall feedback latency.
3Measurement precision
If full-duplex communication is implemented, then feedback frequency and accuracy are improved, but interference between uplink and downlink signals increases
Solution Approach 1:
The patent applies local quality differentiation by using different transmission power levels for primary and secondary access signals within the same time-frequency resources. The base station transmits downlink control information at higher power while user equipment transmits uplink feedback at lower power, creating a power hierarchy that minimizes mutual interference while maintaining both communication directions.
Data Source
AI summary
Embodiments of the present disclosure describe methods, apparatuses, and systems for enhanced control signaling using full-duplex communication in wireless communication networks. A base station may schedule a first user equipment (UE) for primary access to a set of time-frequency resources in a first communication direction (e.g., uplink or downlink). The base station may additionally schedule a second UE for secondary access to the same set of time-frequency resources in a second communication direction that is the opposite of the first communication direction. The secondary access may be used to communicate supplemental control information, such as a channel quality indicator (CQI) and/or modulation and coding scheme (MCS) feedback, hybrid automatic repeat request (HARQ) feedback, and/or multiple input multiple output (MIMO) feedback (e.g., including a rank indicator (RI) and/or a pre-coding matrix indicator (PMI). Other embodiments may be described and claimed.