Distributed MIMO Joint Transmission With Adaptive SINR Offset
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Solution Overview
Problem
In distributed MIMO systems, the arrival of non-JT traffic at base stations serving JT UEs leads to unpredictable signal power reduction and increased interference, resulting in lower SINR for JT UEs and inefficient recovery of transmission performance.
Innovation Solution
A base station identifies JT and non-JT UEs, determines resource blocks for coherent joint transmission, adjusts SINR offset, and performs interference mitigation operations to manage non-JT traffic effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If non-JT traffic is transmitted on resource blocks designated for non-JT traffic, then the base station can serve non-JT UEs, but the signal power for JT UEs is reduced and interference increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the SINR offset parameter based on traffic conditions. When non-JT traffic is detected on reserved resource blocks, the system modifies the SINR offset value to compensate for the signal power reduction and interference impact on JT UEs, thereby maintaining reliable transmission despite the resource sharing scenario
Solution Approach 2:
The system implements dynamics by making the SINR offset adaptive rather than static. The offset is adjusted in real-time based on whether non-JT traffic is present on the resource blocks, allowing the system to dynamically respond to changing traffic conditions and maintain optimal performance for both JT and non-JT UEs
2Adaptability or versatility
If resource blocks are reserved for non-JT traffic, then non-JT traffic can be served, but JT transmission performance deteriorates due to unpredictable signal power reduction
Solution Approach 1:
The patent applies preliminary action by reserving specific resource blocks in advance for potential non-JT traffic. This allows the base station to quickly accommodate non-JT UEs when traffic arrives without needing to reallocate resources dynamically, while the pre-configured SINR offset adjustment mechanism is ready to compensate for any impact on JT transmissions
Solution Approach 2:
The system uses feedback by monitoring the presence of non-JT traffic on reserved resource blocks and adjusting the SINR offset accordingly. This closed-loop approach allows the system to detect traffic conditions and respond with appropriate parameter adjustments to maintain transmission precision for JT UEs
Data Source
AI summary
Methods and apparatuses for a joint transmission in a distributed MIMO in wireless communication systems. The methods of BS comprise: identifying a type of UEs comprising a JT UE and a non-joint traffic non-JT UE; receiving, from the JT UE, feedback information for determining an SINR offset; identifying RBs for a C-JT, the RBs being designated for non-JT traffic and comprising at least one of a time domain resource or a frequency domain resource; determining whether to transmit the non-JT traffic on the RBs; determining the SINR offset for the non-JT UE based on a determination whether to transmit the non-JT traffic on the RBs; and performing an interference mitigation operation between JT UEs and non-JT UEs.