5G Multi-Hop Relay Fast Signaling for Low-Latency Bandwidth Allocation
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Solution Overview
Problem
Existing wireless relay systems for mm bands face high propagation losses in non-line-of-sight scenarios, necessitating dedicated multi-hop relays, and suffer from latency issues due to PHY, MAC, and IP layer processing delays.
Innovation Solution
A fast signaling algorithm for bandwidth allocation in 5G multi-hop relays that bypasses PHY/MAC/IP Stack processing by using a logical downlink and uplink control channel, employing a downlink fast signaling control channel and uplink fast feedback control channel to quickly convey changes in bandwidth allocation, allowing devices to reuse previous allocations when no changes are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional PHY/MAC/IP Stack processing is used for bandwidth allocation signaling, then processing completeness and reliability are ensured, but processing latency increases by 5-50 ms
Solution Approach 1:
The patent segments the bandwidth allocation signaling into two parts: essential bandwidth allocation information transmitted through a fast control channel, and detailed configuration information transmitted through traditional channels. This segmentation allows critical path processing to bypass the slow MAC/IP stack while maintaining complete processing through the two-channel approach.
Solution Approach 2:
The patent introduces a fast control channel as an intermediary mechanism that carries bandwidth allocation information directly from the base station to the relay node, bypassing the traditional MAC/IP stack processing path. This intermediary channel reduces latency while a separate feedback channel ensures processing completeness through verification.
2Measurement precision
If full decoding of bandwidth allocation data is performed every frame, then processing accuracy is maintained, but processing time and power consumption increase
Solution Approach 1:
The patent applies partial action by having relay nodes selectively decode only the essential bandwidth allocation information from the fast control channel, rather than fully decoding all bandwidth allocation data every frame. The node uses this partial information for immediate scheduling decisions, while maintaining processing accuracy through periodic full decoding and verification via the feedback channel.
3Area of stationary object
If multi-hop relays are deployed for mm wave coverage extension, then coverage area is extended, but propagation losses in NLOS scenarios worsen
Solution Approach 1:
The patent implements nested doll by creating a hierarchical relay structure where relay nodes are nested within the coverage area of previous hops. Each relay node receives and regenerates signals, effectively nesting coverage zones. This nested architecture extends the overall coverage area while managing propagation losses through signal regeneration at each hop point.
Data Source
AI summary
A system and method for optimizing the end-to-end latency transfer rates over an air interface employing a Multi-hop Relays (MHR). The present system and method provides fast signaling process when no Downlink/Uplink Bandwidth allocation changes are employed, thereby bypassing PHY/MAC/IP Stack processing. The solution is intended for the new generation of 5G millimeter band multi-hop relays.