Wireless Relay Latency Reduction for Delay-Sensitive UE
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Solution Overview
Problem
Existing techniques are ineffective and inefficient in redirecting User Equipment (UE) using latency-sensitive services from a wireless relay to a macro base station, leading to increased latency in wireless communication networks, particularly when serving multiple access points.
Innovation Solution
A wireless communication system that redirects UE to a donor base station capable of serving the UE, where the wireless relay detects a Guaranteed Bit Rate (GBR) data bearer with excessive delay and transfers an instruction to the UE to exchange additional user data with the donor base station, optimizing access node usage and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a UE communicates with the wireless network over multiple wireless access points (macro base station and wireless relay), then wireless coverage is expanded, but latency for media sessions increases
Solution Approach 1:
The patent implements dynamic path selection by enabling the UE to switch between direct connection to donor base station and connection through wireless relay based on real-time conditions. The system dynamically determines whether to use the relay path or direct path, optimizing the balance between coverage extension and latency reduction for different service scenarios
Solution Approach 2:
The wireless relay acts as an optional intermediary that can be selectively engaged or bypassed. When latency is critical, the UE communicates directly with the donor base station without the relay intermediary, thereby eliminating the additional latency introduced by relay processing while still maintaining the option to use the relay for coverage extension when needed
2Loss of time
If existing techniques redirect UE from wireless relay to macro base station, then latency may be reduced, but the redirection is ineffective and inefficient
Solution Approach 1:
The patent implements feedback mechanisms where the UE provides measurement reports about signal conditions and latency experienced on different paths. The donor base station uses this feedback to intelligently determine when and how to trigger redirection, ensuring that redirection decisions are based on actual network conditions rather than arbitrary thresholds, thereby improving both effectiveness and efficiency
Solution Approach 2:
The system performs preliminary assessments by evaluating UE capability information, current connection status, and network conditions before initiating redirection. This preliminary action ensures that redirection is only attempted when likely to succeed and when actually beneficial, avoiding unnecessary redirection attempts that would waste network resources and time
3Area of stationary object
If a wireless relay is added to expand coverage, then network coverage is enhanced, but the complexity of wireless networking increases
Solution Approach 1:
The patent makes the wireless relay multi-functional by enabling it to serve both as a coverage extension node and as a transparent relay that can be selectively bypassed. The same relay infrastructure supports both relayed connections and direct connections, eliminating the need for separate mechanisms and reducing overall system complexity despite the added coverage capability
Data Source
AI summary
A wireless communication network to redirect User Equipment (UE) to a donor base station, wherein the donor base station wirelessly serves a wireless relay and the UE, and the wireless relay wirelessly serves the UE. The wireless relay wirelessly exchanges user data with the UE using an established data bearer. The wireless relay detects that the data bearer is a Guaranteed Bit Rate (GBR) data bearer and in response, determines that the GBR data bearer is associated with a delay measurement that exceeds a delay measurement threshold. The wireless relay identifies a UE location and UE management data and determines that the donor base station is capable of serving the UE based on the UE location and the UE management data. The wireless relay wirelessly transfers an instruction to the UE redirecting the UE to exchange additional user data with the donor base station.