Distributed Uplink CoMP Bandwidth Management
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Solution Overview
Problem
Enabling distributed uplink Coordinated Multipoint (CoMP) communications in wireless networks is challenging due to bandwidth restrictions in backhaul connections, which limit effective resource utilization and service quality in networks with geographically separated nodes.
Innovation Solution
The method involves adaptive helper cell management and egress bandwidth control mechanisms that allow serving cells to dynamically select and request antenna data and pilot symbols from candidate cells, using egress control metrics to prioritize requests and manage bandwidth efficiently, enabling distributed uplink CoMP operations across various deployments and architectures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If distributed uplink CoMP communications are implemented with geographically separated nodes, then network coverage and capacity are improved, but backhaul bandwidth requirements increase beyond available resources
Solution Approach 1:
The patent segments the backhaul bandwidth allocation by introducing egress control metrics that divide bandwidth into prioritized segments for different CoMP operations. This allows critical CoMP communications to receive guaranteed bandwidth segments while less critical traffic uses remaining capacity, resolving the contradiction between high network capacity requirements and limited backhaul bandwidth availability.
Solution Approach 2:
The patent dynamically changes bandwidth allocation parameters through egress control metrics that adjust bandwidth grants based on real-time network conditions, CoMP operation priorities, and available backhaul capacity. This parameter adaptation enables the system to maintain high network capacity while operating within constrained backhaul bandwidth by continuously optimizing the allocation ratio.
2Reliability
If multiple candidate cells are selected for CoMP operations, then service quality and reliability are improved, but coordination complexity and signaling overhead increase
Solution Approach 1:
The patent introduces dynamic cell selection and egress control mechanisms that adapt the number and identity of candidate cells based on real-time channel conditions, traffic demands, and backhaul availability. This dynamic approach maintains high service quality by selecting optimal cells while reducing coordination complexity by adjusting the active CoMP set size according to current network state, preventing unnecessary complexity from static multi-cell configurations.
Solution Approach 2:
The patent implements feedback loops where egress control metrics are continuously updated based on CoMP operation performance, backhaul bandwidth utilization, and cell interference conditions. This feedback mechanism enables automatic adjustment of candidate cell selection and bandwidth allocation, maintaining high reliability through adaptive optimization while reducing coordination complexity by eliminating manual configuration and simplifying the decision-making process through automated feedback-driven cell selection.
3Productivity
If egress bandwidth control mechanisms are implemented, then bandwidth utilization efficiency is improved, but system complexity and processing overhead increase
Solution Approach 1:
The patent designs the egress control mechanism to serve multiple functions simultaneously: bandwidth allocation, priority management, CoMP coordination, and interference control all through a unified egress control metric framework. This multi-functionality improves bandwidth utilization efficiency by coordinating multiple objectives through a single mechanism while reducing system complexity by avoiding separate specialized systems for each function, as the egress control framework handles diverse tasks through standardized procedures.
Data Source
AI summary
The embodiments of the invention provide at least a method and apparatus to schedule an uplink communication from a user equipment of a plurality of user equipment; identify one or more candidate cells to support the uplink communication from the user equipment; send a request to the identified one or more candidate cells for requesting at least one of antenna data and pilot symbols from the one or more candidate cells for the uplink communication from the user equipment; and in response to the request, receive the uplink communication from the user equipment via a coordinated multi-point operation using at least in part a reception cells of the one or more candidate cells. Further, to receive, by one or more candidate cell, from a serving cell a request for at least one of antenna data and pilot symbols from the one or more candidate cells for a scheduled uplink communication from a user equipment to the serving cell; and in response to the request, provide the at least one of antenna data and pilot symbols for the uplink communication from a user equipment to the serving cell.