Bandwidth Part Beam Failure Recovery in Wireless Devices
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Solution Overview
Problem
Future wireless communications networks face challenges in efficiently supporting a wide range of devices with diverse data traffic profiles, including reduced complexity devices and high-resolution video displays, due to varying latency, reliability, and data rate requirements, such as those for Ultra Reliable Low Latency Communications (URLLC) services.
Innovation Solution
A communications device and infrastructure equipment that utilize a system bandwidth comprising multiple bandwidth parts, allowing for the activation and deactivation of beams and bandwidth parts to efficiently manage beam failure and resource allocation, enabling the selection of alternative bandwidth parts for continued communication when beam failure criteria are met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple bandwidth parts are activated to support diverse traffic profiles, then adaptability and service versatility are improved, but device complexity and resource management difficulty increase
Solution Approach 1:
The system bandwidth is divided into multiple bandwidth parts (BWPs), each configured with specific parameters suitable for different traffic types. This segmentation allows the device to activate only the BWP needed for the current service, reducing management complexity while maintaining adaptability for diverse traffic profiles including eMBB, URLLC, and mMTC
Solution Approach 2:
The patent implements dynamic BWP switching and activation/deactivation mechanisms that allow the communications device to adaptively select and switch between different bandwidth parts based on current service requirements. This dynamic approach enables the system to optimize resource usage by activating only necessary BWPs, thereby reducing complexity while maintaining versatility
2Reliability
If beam failure detection is implemented for reliability, then communication reliability is improved, but latency increases due to detection and switching time
Solution Approach 1:
The system performs preliminary beam quality monitoring and evaluation before complete beam failure occurs. By continuously assessing beam conditions and detecting degradation trends early, the system can initiate recovery procedures proactively, reducing the actual failure time while maintaining high reliability through preventive beam management
Solution Approach 2:
When beam failure is detected, the system rapidly switches to alternative beams or bandwidth parts without prolonged detection delays. The patent implements accelerated beam failure recovery mechanisms that skip unnecessary detection steps and directly transition to backup resources, minimizing the time loss while ensuring reliable communication continuity
3Reliability
If multiple beams are activated across bandwidth parts, then communication coverage and reliability are improved, but resource consumption and interference increase
Solution Approach 1:
Different bandwidth parts are configured with beams optimized for specific local conditions and service requirements. Each BWP contains beams tailored to particular coverage areas, traffic types, and channel conditions, allowing the system to activate only the locally appropriate beams. This reduces overall resource consumption while maintaining comprehensive coverage through specialized local beam configurations
Solution Approach 2:
The patent designs bandwidth parts and beams to serve multiple functions and service types. A single BWP configuration can support different traffic profiles (eMBB, URLLC, mMTC) and the same beam infrastructure is reused across multiple services. This multi-functionality reduces total resource consumption while achieving broad communication coverage and reliability
Data Source
AI summary
A communications device for use in a wireless communications network providing a wireless access interface within a system bandwidth, the system bandwidth comprising a plurality of bandwidth parts, the communications device comprising a transmitter configured to transmit signals using a plurality of activated bandwidth parts, a receiver configured to receive signals using the plurality of activated bandwidth parts, the received signals being signals transmitted using a plurality of activated beams, and a controller configured to control the transmitter and the receiver so that the communications device is operable: to determine that an activated beam associated with a first bandwidth part satisfies beam failure criteria; to select from the plurality of activated bandwidth parts a second bandwidth part; and to transmit using communications resources associated with the selected second bandwidth part a beam failure indication indicating that the activated beam associated with the first bandwidth part satisfies the beam failure criteria.