Self-Interference Reporting for Full-Duplex Wireless Devices
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Solution Overview
Problem
Current wireless communication systems lack mechanisms for wireless devices to report self-interference during full-duplex operations, leading to inefficient and unreliable communications due to unaddressed interference.
Innovation Solution
Wireless devices perform self-interference measurements using reference signals and transmit measurement reports to a network node, allowing the network to configure full-duplex communications based on interference levels, with configurable reporting parameters such as frequency and priority.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex communications are implemented, then communication efficiency and resource utilization are improved, but self-interference increases and communication reliability deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the wireless device measures self-interference levels using reference signals and reports these measurements to the network node. The network node uses this feedback information to determine whether to configure full-duplex communications, thereby adjusting the system state based on actual interference conditions to maintain reliability while achieving efficiency gains.
Solution Approach 2:
The patent performs self-interference measurements in advance before configuring full-duplex communications. The wireless device transmits reference signals and measures the received power at different antenna arrays to assess potential self-interference levels beforehand. This preliminary assessment allows the network node to make informed decisions about full-duplex configuration, preventing unreliable communications from being established.
2Reliability
If self-interference measurements are performed, then communication reliability is improved, but measurement overhead and time consumption increase
Solution Approach 1:
The patent uses reference signals that serve multiple functions: they are transmitted for normal communication operations and simultaneously used for self-interference measurements. The same reference signals are received at multiple antenna arrays for both communication purposes and interference assessment, eliminating the need for separate dedicated measurement signals and reducing overall measurement overhead.
Solution Approach 2:
The patent performs self-interference measurements continuously or periodically as part of normal communication operations rather than as separate discrete tasks. The measurement process is integrated into the ongoing communication workflow, allowing the wireless device to assess interference levels in real-time without interrupting normal data transmission, thereby minimizing time loss.
3Measurement precision
If multiple antenna arrays are used for measurements, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent leverages the existing antenna arrays already deployed for communication purposes to perform self-interference measurements. Instead of adding separate dedicated measurement antennas, the system uses the same antenna structures for both transmitting/receiving communication signals and measuring self-interference, thereby achieving precise measurements without increasing hardware complexity.
Solution Approach 2:
The patent merges the self-interference measurement function with the existing communication signal transmission and reception functions. The reference signals used for communication are simultaneously utilized for measuring self-interference, combining multiple functions into a single system architecture. This integration eliminates the need for separate measurement hardware while maintaining measurement precision through the use of multiple antenna arrays for receiving reference signals.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A first wireless device may transmit reference signals via a first antenna array of the first wireless device. The first wireless device may perform, according to a reporting configuration for self-interference at the first wireless device, a set of measurements on the reference signals received at a second antenna array of the first wireless device. The first wireless device may determine a priority associated with transmission of measurement reports associated with self-interference at the first wireless device. The first wireless device may then transmit, to a second wireless device and according to the reporting configuration, a measurement report including an indication of self-interference for full-duplex communications at the first wireless device that is based on performing the set of measurements on the reference signals, where the measurement report is transmitted in accordance with the determined priority.