Idle Mobile Devices as CoMP Relays for Backhaul Reduction
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Solution Overview
Problem
Coordinated Multi-Point (CoMP) transmission and reception in wireless communication networks face challenges with high backhaul bandwidth requirements and processing loads due to the need for low latency and synchronous data transmission, which can lead to peak congestion and increased costs.
Innovation Solution
Mobile devices are utilized as cooperating nodes to assist in CoMP transmission and reception through device-to-device (D2D) communications, retransmitting signals between other mobile devices and base stations to reduce backhaul bandwidth and processing loads, and improve interference coordination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If CoMP transmission and reception is implemented with base stations as cooperating nodes, then interference coordination and network capacity are improved, but backhaul bandwidth requirements and processing loads increase significantly
Solution Approach 1:
Mobile devices act as intermediary nodes between base stations and other mobile devices in CoMP operations. Instead of requiring direct base station-to-base station communication for all CoMP functions, mobile devices relay and process signals locally, reducing the bandwidth burden on backhaul links while maintaining interference coordination capabilities.
Solution Approach 2:
The CoMP functionality is segmented between base stations and mobile devices. Base stations handle high-level coordination and control, while mobile devices perform local signal processing and relaying. This segmentation distributes the processing load and reduces centralized backhaul bandwidth requirements.
2Reliability
If synchronous CoMP transmission is implemented to improve interference coordination, then system performance is improved, but peak congestion on backhaul links increases
Solution Approach 1:
CoMP operations utilize periodic time-division structures where mobile devices assist in signal transmission and reception at specific time intervals. This periodic operation allows for controlled interference coordination while distributing traffic load over time, preventing peak congestion on backhaul links.
3Quantity of substance
If mobile devices are used as cooperating nodes in CoMP, then backhaul bandwidth requirements are reduced, but device complexity and energy consumption increase
Solution Approach 1:
Mobile devices perform CoMP-related signal processing and relaying functions using their own communication capabilities without requiring additional specialized hardware. The devices leverage existing transceivers and processing units to assist in CoMP operations, avoiding the need for complex dedicated infrastructure while reducing backhaul bandwidth requirements.
Data Source
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AI summary
Idle mobile devices are used as cooperating devices to support coordinated multipoint transmission and reception for uplink and downlink communications between a primary mobile device (14) and its serving base station (12). For uplink communications, the cooperating mobile devices receive the uplink transmission from the primary mobile device (14) and retransmit the received data signal to the serving base station (12) for the primary mobile device (14). For downlink communications, the cooperating mobile devices receive the downlink transmission from the serving base station (12) and retransmit the received data signal to the primary mobile device (14).