Wireless Uplink Power Control Using Non-Co-Located Support Nodes
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Solution Overview
Problem
Current LTE systems face limitations in inter-site and intra-site coordinated multipoint transmission, restricting uplink support to adjacent network nodes and failing to optimize signal gains and power consumption, especially at cell edges, with high installation and maintenance costs.
Innovation Solution
Implementing a method for power control in wireless communications networks by detecting and confirming available uplink support from non-co-located nodes, enabling communication through these nodes to reduce transmission power and interference, using evolved node B base stations with base band units and remote radio heads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If coordinated multipoint transmission is restricted to adjacent network nodes, then device complexity is reduced, but uplink throughput and signal gains are limited
Solution Approach 1:
The patent segments the coordinated multipoint transmission into two distinct phases: a discovery phase where non-co-located nodes identify available uplink support, and a confirmation phase where capability is verified. This segmentation allows the system to expand coordination beyond adjacent nodes without overwhelming complexity, as each phase handles specific tasks independently.
Solution Approach 2:
The patent implements preliminary action by having nodes perform discovery and confirmation of uplink support capabilities before actual data transmission begins. This advance preparation establishes the coordination framework in advance, enabling non-adjacent nodes to participate in coordinated multipoint transmission without increasing real-time complexity.
2Use of energy by moving object
If transmission power is increased to improve coverage, then signal strength improves, but power consumption and interference increase
Solution Approach 1:
The patent uses non-co-located nodes as intermediaries to provide uplink support. Instead of directly increasing transmission power from the user equipment, the system introduces supporting nodes that relay and amplify signals, thereby improving coverage without proportionally increasing power consumption or interference from the user equipment itself.
Solution Approach 2:
The patent merges the transmission capabilities of multiple nodes including the serving cell and supporting non-co-located nodes. By combining signals from multiple sources, the system achieves improved coverage and signal strength without requiring any single node to operate at maximum power, thus reducing overall interference and power consumption.
3Productivity
If more nodes are involved in uplink support, then network utilization improves, but coordination overhead and latency increase
Solution Approach 1:
The patent performs discovery and capability confirmation in advance before actual data transmission. This preliminary action establishes the coordination framework ahead of time, so that when data needs to be transmitted, the participating nodes are already identified and confirmed, minimizing real-time coordination overhead and latency.
Solution Approach 2:
The patent extracts the coordination overhead from the data transmission path by separating discovery and capability confirmation into distinct preliminary steps. This extraction allows the actual data transmission to proceed with minimal coordination delays, as the coordination framework is already established from the previous phases.
Data Source
AI summary
A system, a method, and a computer program product for power control using uplink coordinated multi-point transmission in a wireless communications system are provided. Using a first node, at least one second node configured to provide an uplink support to user equipment communicating with the first node is detected. The first node receives a confirmation from the second node indicating availability of uplink support by the second node to the user equipment. Based on the received confirmation, communicating with the user equipment on an uplink using the second node is established.