ProSe Joint Demodulation Using Capability-Based UE Pairing
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently supporting joint processing for proximity-based services (ProSe) and multiple-input multiple-output (MIMO) communications, particularly in reducing latency and optimizing UE pairing for direct UE-to-UE communication.
Innovation Solution
UEs exchange capability messages during ProSe discovery to indicate their ProSe and joint processing capabilities, allowing a network entity to determine and indicate coupling for joint processing, enabling efficient joint processing with assistance by one or more UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UEs perform joint processing for ProSe communications, then communication efficiency is improved, but system complexity increases
Solution Approach 1:
The patent segments the joint processing capability into separate indication messages: a first capability message indicating ProSe communication capability and a second capability message indicating joint processing capability. This segmentation allows the network entity to selectively activate joint processing based on specific capabilities, improving communication efficiency while managing system complexity through modular capability management.
Solution Approach 2:
The patent implements multi-functionality by designing the capability message system to handle both ProSe discovery and joint processing indications through a unified messaging framework. The network entity uses these capability messages to determine UE pairing for both discovery purposes and joint processing purposes, allowing the same infrastructure to serve multiple functions without proportionally increasing complexity.
2Productivity
If UEs exchange capability messages during ProSe discovery, then UE pairing optimization is improved, but signaling overhead increases
Solution Approach 1:
The patent applies preliminary action by having UEs exchange capability messages during the ProSe discovery phase, before actual joint processing occurs. This advance exchange of capability information (first capability message for ProSe capability, second capability message for joint processing capability) allows the network entity to pre-determine optimal UE pairing, improving pairing optimization while consolidating signaling into the existing discovery procedure to manage overhead.
3Reliability
If the network entity determines UE coupling based on capability messages, then communication reliability is improved, but processing time increases
Solution Approach 1:
The network entity performs preliminary determination of UE coupling based on exchanged capability messages during the discovery phase. By evaluating the first capability message (ProSe capability) and second capability message (joint processing capability) in advance, the network entity can pre-establish reliable UE pairings, improving communication reliability while reducing real-time processing requirements during actual data transmission.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may transmit, in accordance with proximity-based service (ProSe) discovery with a network entity, a first capability message indicative of a first capability of the first UE to perform ProSe communications. The first UE may transmit a second capability message indicative of a second capability of the first UE to perform joint processing for multiple-input multiple-output (MIMO) communications, where the joint processing includes assistance by one or more assisting UEs for reception of a message at an assisted UE. The first UE may receive, based on transmission of the first capability message and the second capability message, an indication that the first UE is to perform the joint processing with a second UE. The first UE may perform the joint processing with the second UE in accordance with the indication.