Uplink DMRS Bundling Modes for Phase Discontinuity Handling
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Solution Overview
Problem
Wireless communication systems face challenges in managing phase discontinuities during DMRS bundling, leading to failed decoding attempts and unnecessary retransmissions due to base stations' inability to compensate for phase discontinuities, resulting in power and resource wastage.
Innovation Solution
UEs provide capability information to base stations indicating their DMRS bundling modes, allowing base stations to configure optimal DMRS bundling strategies that avoid phase discontinuities based on their compensation capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If DMRS bundling is performed without considering base station compensation capabilities, then transmission coverage is extended, but phase discontinuities cause failed decoding attempts and resource wastage
Solution Approach 1:
The base station determines its own phase discontinuity compensation capability in advance and configures the appropriate DMRS bundling mode (first mode without compensation, second mode with compensation) before actual DMRS transmission. This preliminary configuration ensures that the transmission mode matches the base station's capability, preventing decoding failures while extending coverage.
Solution Approach 2:
The patent changes the DMRS bundling mode parameter based on the base station's phase discontinuity compensation capability. When compensation capability is present, the second bundling mode is used; when absent, the first mode is used. This parameter adaptation resolves the contradiction by matching the transmission approach to the available capabilities.
2Productivity
If DMRS bundling is performed without capability matching, then resource utilization increases, but power wastage occurs due to unnecessary retransmissions
Solution Approach 1:
The base station provides feedback about its phase discontinuity compensation capability to the network, which then configures the appropriate DMRS bundling mode. This feedback mechanism ensures that DMRS bundling is performed only when the base station can properly compensate for phase discontinuities, preventing failed decodings and unnecessary retransmissions that would waste power and resources.
3Adaptability or versatility
If multiple DMRS bundling modes are supported, then system adaptability improves, but device complexity increases
Solution Approach 1:
The patent segments the DMRS bundling process into distinct modes based on phase discontinuity compensation capability. The first bundling mode is used when compensation is not available, and the second mode is used when compensation is available. This segmentation allows the system to adapt to different capabilities without requiring all base stations to implement complex compensation mechanisms, thus managing device complexity while maintaining adaptability.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for communicating using DMRS bundling modes. A method that may be performed by a first network node (e.g., a user equipment (UE)) includes transmitting, to a second network node (e.g., a base station (BS) or a portion thereof), capability information indicating a bundling capability of the first network node for one or more demodulation reference signal (DMRS) bundling modes; receiving, based on the capability information, configuration information including an indication of a particular DMRS bundling mode of the one or more DMRS bundling modes; and transmitting bundled DMRSs according to the particular DMRS bundling mode of the one or more DMRS bundling modes. In some cases, the indication included in the configuration information can indicate to perform DMRS bundling according to the particular DMRS bundling mode.