Client Device Operation Mode Indication via DCI
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Solution Overview
Problem
Current 5G NR wireless networks face challenges in dynamically configuring uplink baseband signal waveforms, particularly for enhancing UL coverage, as existing semi-static configurations are inadequate for time-varying scenarios.
Innovation Solution
A client device and network node device system that dynamically indicates and switches between operation modes of uplink baseband signal waveforms by using a time duration and period indication within downlink control information (DCI), allowing for dynamic switching without RRC reconfiguration, and minimizing DCI size misalignment and scheduler impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If semi-static configuration of uplink baseband signal waveform is used via RRC, then device complexity is reduced and ease of operation is improved, but adaptability to time-varying scenarios deteriorates and UL coverage enhancement is limited
Solution Approach 1:
The patent implements dynamic waveform configuration by introducing a time duration indicator in DCI that enables the client device to switch between different operation modes (first waveform and second waveform) based on current channel conditions. This dynamic switching mechanism allows the system to adapt to time-varying scenarios while maintaining operational simplicity through automated mode selection based on coverage requirements.
2Adaptability or versatility
If dynamic configuration of uplink baseband signal waveform is implemented, then adaptability to time-varying scenarios is improved and UL coverage is enhanced, but device complexity increases and ease of operation deteriorates
Solution Approach 1:
The patent introduces a network node device as an intermediary that provides the time duration indicator to the client device. This intermediary mechanism allows the network to control the dynamic waveform switching, offloading the complexity of decision-making from the client device to the network side, thereby enhancing adaptability while keeping client device complexity manageable.
Solution Approach 2:
The patent employs preliminary configuration where the client device is pre-configured with multiple operation modes and their corresponding waveforms. The device also pre-determines the time duration for applying each waveform based on the received time duration indicator. This preliminary preparation reduces runtime complexity by having switching parameters ready in advance.
3Loss of time
If dynamic waveform switching is implemented without RRC reconfiguration, then latency is reduced and productivity is improved, but DCI size misalignment and scheduler impact increase
Solution Approach 1:
The patent segments the DCI structure by introducing a specific time duration indicator field that is separately configured and interpreted. This segmentation allows the DCI to carry waveform switching information without requiring complete RRC reconfiguration, thereby reducing latency while managing DCI size through structured field allocation and interpretation rules.
Data Source
AI summary
Devices, methods and computer programs for client device operation mode indication are disclosed. A client device obtains a first indication indicating at least a time duration and at least a first period for repeating the time duration. A downlink control information, DCI, received within the indicated time duration includes a second indication indicating a second operation mode of the client device, and the second indication is not included when the DCI is received outside of the indicated time duration. In response to receiving, at the client device, the DCI from a network node device within the indicated time duration, the client device determines the second operation mode of the client device based on the received second indication, and applies the determined second operation mode of the client device.