PDSCH Relay Triggering for 5G UE Connectivity
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Solution Overview
Problem
In wireless communication systems, especially in 5G networks, the increasing number of devices associated with a base station consumes more resources, leading to delayed uplink and downlink grants and degraded performance due to the need for increased Physical Downlink Control Channel (PDCCH) communications, which can result in power consumption and processing issues for user equipment (UEs).
Innovation Solution
The use of Physical Downlink Shared Channel (PDSCH) communications to trigger relay sidelink transmissions, allowing base stations to communicate with user equipment through relay devices, which generate and transmit combined transport blocks containing control and data components, enabling efficient resource allocation and decoding of control information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If PDCCH communications are increased to support more devices, then device connectivity is improved, but power consumption and processing load on UEs worsen
Solution Approach 1:
The patent introduces a relay UE as an intermediary node between the base station and remote UEs. The relay UE receives downlink data from the base station via PDSCH and forwards it to remote UEs, eliminating the need for remote UEs to directly receive and process PDCCH communications. This mediator approach maintains device connectivity while reducing power consumption and processing load on remote UEs.
2Adaptability or versatility
If PDCCH communications are increased to support more devices, then device connectivity is improved, but processing load on UEs worsens
Solution Approach 1:
The relay UE acts as an intermediary that handles the complex processing tasks. It receives combined transport blocks from the base station, extracts control components, and generates separate transport blocks for remote UEs. This distribution of processing tasks reduces the processing load on remote UEs while maintaining their connectivity to the network.
3Productivity
If relay devices are used to communicate with UEs, then spectral efficiency is improved, but system complexity increases
Solution Approach 1:
The patent merges control components and data components into a single combined transport block for transmission over PDSCH. The relay UE then separates these components and generates appropriate transport blocks for remote UEs. This merging approach improves spectral efficiency by utilizing shared channel resources while the automated separation process at the relay minimizes the added system complexity.
4Ease of operation
If traditional PDCCH communications are used, then control information delivery is straightforward, but resource constraints and performance degradation occur
Solution Approach 1:
The relay UE serves as an intermediary that receives control information from the base station and redistributes it to remote UEs. This approach maintains the simplicity of control information delivery through established protocols while improving resource efficiency by enabling multiple UEs to share relay resources and reducing the need for direct base station-UE connections for all devices.
Data Source
AI summary
Disclosed are systems and techniques for wireless communications. For instance, a wireless relay device can receive a first Physical Downlink Shared Channel (PDSCH) communication and determine, from the PDSCH communication, a first combined transport block including a plurality of components, the plurality of components including a first control component associated with a first user equipment (UE). The relay device can generate a first transport block that includes the first control component and transmit the first transport block.