Uplink Transmission Node Selection in Heterogeneous Networks
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Solution Overview
Problem
The existing uplink transmission mechanism in LTE-A systems imposes a burden on macro eNBs, increases uplink interference between UEs, and degrades power saving, as it typically supports only single-node transmission for UEs.
Innovation Solution
A method and system that dynamically determine an appropriate uplink transmitting node for UEs in a heterogeneous network, allowing flexible selection based on criteria such as distance, path loss, RSRP, RSRQ, and CQI, to alleviate the burden on macro eNBs and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If uplink transmission is restricted to a single node (macro eNB), then the system maintains simplicity in uplink management, but the burden on macro eNB increases, uplink interference between UEs worsens, and power consumption of UEs increases
Solution Approach 1:
The patent segments the uplink transmission function by introducing multiple uplink transmitting nodes (macro eNB and local nodes) that can independently receive and process uplink data from UEs. This divides the concentrated burden on macro eNB into distributed processing across multiple nodes, reducing the load on any single node while maintaining manageable complexity through standardized processing procedures at each node.
2Device complexity
If uplink transmission is restricted to a single node (macro eNB), then the transmission mechanism remains simple, but uplink interference between UEs increases
Solution Approach 1:
The patent segments the reception function across multiple geographically distributed nodes (macro eNB and local nodes). UEs can transmit to different nodes based on their location, which spatially separates the transmission paths and reduces co-channel interference between UEs that would otherwise contend for the same macro eNB resources.
Solution Approach 2:
The patent enables local nodes to serve UEs in their coverage areas, allowing uplink transmission to be handled locally rather than forcing all UEs to transmit to distant macro eNBs. This local化处理 reduces transmission distance and power consumption while minimizing interference through localized resource allocation.
3Device complexity
If uplink transmission is restricted to a single node (macro eNB), then the system architecture remains simple, but power consumption of UEs increases
Solution Approach 1:
The patent introduces local nodes positioned closer to UEs in coverage areas, enabling uplink transmission over shorter distances. This local化处理 reduces the transmission power required by UEs compared to transmitting over longer distances to macro eNBs, thereby reducing UE power consumption while maintaining simple system architecture through standardized node operations.
Data Source
AI summary
Disclosed are a method, device and system for transmitting uplink information, which are used for solving the problem that the existing UE uplink transmission mechanism may increase the load of a Macro eNB and increase the uplink interference among UEs, and is not beneficial to power saving of UEs. The method in the embodiments of the present application comprises: a macro eNB determining an uplink transmitting node used for receiving uplink information about a UE this time from a transmission node connected to the UE; determining the effective time of the uplink transmission node determined this time; and after the effective time of the uplink transmitting node determined this time has arrived, receiving the uplink information sent by the UE through the uplink transmitting node determined this time. Under a heterogeneous network, the embodiments of the present application can flexibly determine an appropriate uplink transmission node to transmit uplink information, thereby reducing the load of the Macro eNB, reducing the interference among various UEs, improving the system throughput, and saving the electric quantity of the UEs.