Uplink CoMP Mode Selection Based on Neighbor CPU Load
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Solution Overview
Problem
In LTE cellular radio access networks, the increased processing demands on coordinating base stations and backhaul links at cell edges due to decentralized joint processing modes can lead to inefficiencies, particularly in managing processor loads and backhaul traffic, which affects the quality of service at cell edges.
Innovation Solution
A method is implemented where a first access node dynamically determines the CPU load of a second access node and selects a CoMP mode from a plurality of CoMP modes, sending a CoMP-mode message to instruct the second access node to use the selected mode, thereby managing processor loads and backhaul link loads by switching between centralized and decentralized uplink CoMP modes based on CPU load and backhaul traffic levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If decentralized joint processing mode is used, then reception quality at cell edges is improved, but processing load on coordinating base stations increases
Solution Approach 1:
The system dynamically selects between centralized and decentralized joint processing modes based on real-time conditions. The network controller monitors processing load and reception quality metrics, then adaptively switches the CoMP mode for different user equipment or time periods, allowing the system to optimize between reception quality and processing load requirements
Solution Approach 2:
Different joint processing modes are applied to different spatial locations or user groups. The system can apply decentralized mode in areas where reception quality is critical while using centralized mode in areas where processing load is the primary constraint, allowing localized optimization of system performance
2Reliability
If decentralized joint processing mode is used, then reception quality at cell edges is improved, but backhaul traffic increases
Solution Approach 1:
The system dynamically adjusts the backhaul traffic requirements by switching between processing modes. When backhaul capacity is constrained, the system transitions to centralized mode which reduces backhaul traffic. When backhaul capacity is充足, the system can utilize decentralized mode to improve reception quality, thus dynamically adapting to available backhaul resources
3Device complexity
If centralized joint processing mode is used, then processing load on coordinating base stations is reduced, but reception quality at cell edges deteriorates
Solution Approach 1:
The network controller continuously monitors reception quality metrics and processing load levels, then dynamically switches between centralized and decentralized modes. When reception quality falls below a threshold, the system transitions to decentralized mode to improve quality. When processing load becomes excessive, the system switches to centralized mode to reduce load, maintaining an optimal balance
Data Source
AI summary
Embodiments disclosed herein may be implemented by a first access node in an access network, such as by an eNodeB in an LTE network, in order to determine an uplink coordinated multipoint (CoMP) mode for one or more other access nodes with which the given access node is coordinating. An example method involves: (a) determining, by a first access node, a central processing unit (CPU) load of a second access node, (b) based at least in part on the CPU load of the second access node, the first access node selecting a coordinated multipoint (CoMP) mode from a plurality of CoMP modes, and (c) sending a CoMP-mode message from the first access node, wherein the CoMP-mode message instructs the second access node to use the selected CoMP mode.