Control Resource Set Layout for Bandwidth-Reduced UE Scheduling
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Solution Overview
Problem
Existing wireless communication systems face challenges in scheduling bandwidth-limited user equipment (UE) due to their inability to monitor all channels and frequencies within a slot, leading to difficulties in efficient communication.
Innovation Solution
The solution involves spreading control information across more than three symbols and multiple slots by mapping control channel elements (CCEs) across these occasions, allowing UE to receive control information in multiple monitoring occasions, thereby enhancing communication capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional Type 1 or Type 2 C-RS designs are used for BRLTE-U, then coverage extension techniques can be applied, but the device complexity and power consumption increase significantly
Solution Approach 1:
The patent extracts and eliminates the unnecessary C-RS reception and processing functions from BRLTE-U devices. Specifically, BRLTE-U devices are designed to ignore MIB and SIB messages containing C-RS configuration, and to disregard C-RS resource element mappings in their received signals. This extraction of unnecessary functionality directly reduces device complexity and power consumption while maintaining coverage extension capabilities through alternative means.
Solution Approach 2:
The patent employs a simplified, disposable approach to C-RS handling in BRLTE-U devices. Rather than implementing complex C-RS processing chains, the device uses a lightweight configuration that allows it to skip C-RS processing entirely for certain message types. This disposable simplification strategy reduces the operational complexity and power requirements of BRLTE-U devices.
2Adaptability or versatility
If BRLTE-U devices support both NB-IoT and LTE networks, then network compatibility is improved, but the device complexity increases
Solution Approach 1:
The patent implements dynamic behavior in BRLTE-U devices through mode indication mechanisms. The device can dynamically switch between NB-IoT mode and LTE mode based on network conditions and device capabilities. This dynamic operation allows a single device design to adapt to different network types without requiring separate hardware implementations, thereby maintaining versatility while controlling complexity through software-controlled mode switching.
Solution Approach 2:
The patent creates a universal BRLTE-U device design that can operate in both NB-IoT and LTE networks. The device incorporates universal processing capabilities that handle both network types using common hardware and base processing logic. This multi-functionality is achieved through a unified device architecture that can interpret and process messages from both NB-IoT and LTE networks, reducing the need for separate specialized hardware for each network type.
3Measurement precision
If C-RS is configured for BRLTE-U in SIB1 or other SIBs, then measurement and positioning accuracy improves, but power consumption and processing load increase
Solution Approach 1:
The patent applies local quality by selectively enabling or disabling C-RS processing based on the specific message type and device mode. Rather than uniformly processing C-RS in all messages, the device applies different processing qualities to different message contexts. For example, C-RS processing may be enabled for certain measurement scenarios while disabled for routine message reception, optimizing the balance between measurement accuracy and power consumption based on local operational requirements.
Solution Approach 2:
The patent implements partial action by selectively processing C-RS only when necessary for specific functions such as measurement or positioning, rather than continuously processing C-RS in all received messages. The device can choose to process only the essential portions of C-RS relevant to its current operational needs, reducing overall processing load and power consumption while maintaining measurement accuracy when required.
Data Source
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AI summary
Methods, systems, and devices for wireless communications are described. A bandwidth reduced low-tier user equipment (UE) may receive a signal identifying a control resource set for the UE to monitor for control information scheduling communications between the UE and a base station, the control resource set comprising a plurality of control channel elements organized across more than three symbols and comprising one or more first resource element groups mapped to a first monitoring occasion and one or more second resource element groups mapped to a second monitoring occasion. The UE may receive, during the first monitoring occasion, at least a first portion of the control information on the one or more first resource element groups. The UE may receive, during the second monitoring occasion, at least a second portion of the control information on the one or more second resource element groups. The UE may communicate with the base station in accordance with the control information.