Dynamic Capability Selection for Receive-Limited UEs in 5G
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Solution Overview
Problem
In wireless communication systems, particularly in 5G networks, receive limited user devices are unable to receive data transmitted using unsupported communication capabilities, leading to incompatibility issues with transmit devices, which affects the reception of services like V2X and MBMS due to limitations in carrier support, modulation and coding schemes, and transmission time intervals.
Innovation Solution
Implementing a flexible approach where unsupported communication capabilities are selectively disabled or configured to avoid use by transmit UEs when receive limited UEs are present, using techniques like carrier priority based carrier selection, modulation and coding scheme adjustments, and transmission time interval modifications to ensure compatibility and enable seamless data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transmit UEs use full set of communication capabilities for transmission, then transmission performance and data rate are improved, but receive limited UEs cannot receive the transmission due to capability mismatches
Solution Approach 1:
The transmit UE dynamically adjusts its communication capabilities based on the presence and capabilities of receive limited UEs. The system transitions from a static capability set to a dynamic one that adapts to the receiver's limitations, selecting appropriate modulation schemes, carrier configurations, and transmission parameters to ensure successful reception while maximizing data rate within the constraints.
Solution Approach 2:
The transmit UE changes communication parameters such as modulation and coding schemes (MCS), carrier frequency selection, and transmission time intervals to match the capabilities of receive limited UEs. By adjusting these parameters, the system maintains compatibility with receivers that have limited capabilities while still achieving effective data transmission.
2Adaptability or versatility
If transmit UEs disable unsupported communication capabilities to support receive limited UEs, then compatibility and service reception are improved, but overall transmission performance and data rate decrease
Solution Approach 1:
The transmit UE applies different communication capabilities to different receive UEs based on their individual capabilities. Instead of uniformly disabling all advanced features, the system selectively adjusts parameters for each receiver, maintaining high-performance capabilities for receivers that support them while providing simplified modes for receive limited UEs. This localized adaptation preserves overall system productivity while ensuring compatibility.
Solution Approach 2:
The communication capabilities are segmented into multiple levels or tiers, with the transmit UE selecting the appropriate capability level for each receive UE. This segmentation allows the system to offer full-featured transmission to capable receivers while providing a reduced but still effective capability set to receive limited UEs, thereby maintaining overall system productivity.
3Adaptability or versatility
If the system provides support for receive limited UEs across all services, then compatibility is improved, but complexity of capability management and configuration increases
Solution Approach 1:
The system performs preliminary capability exchange and assessment before actual data transmission begins. Receive limited UEs indicate their capabilities in advance, allowing the transmit UE to pre-configure appropriate communication parameters and select suitable transmission modes. This preliminary action simplifies real-time capability management by resolving compatibility issues before they arise during data transmission.
Solution Approach 2:
The base station acts as an intermediary that manages and coordinates capability information across the network. It receives capability indications from receive limited UEs, determines appropriate configuration parameters, and provides this information to transmit UEs. This intermediary approach centralizes the complexity of capability management, reducing the burden on individual UEs while ensuring comprehensive support for receive limited devices.
Data Source
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AI summary
A technique includes receiving, by a user device from a base station, information indicating that support for a receive limited user device is enabled based on a presence of a threshold number of receive limited user devices within a range of a cell of the base station, wherein a receive limited user device is unable to receive a transmission that was transmitted based on one or more communication capabilities of a full set of communication capabilities, selecting, by the user device in response to the receiving, one or more communication capabilities to support a receive limited user device, and transmitting, by the user device, information using the selected one or more communication capabilities.