Handoff Trigger Point Adjustment for Wireless Coverage Extension
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In cellular networks, the deployment of higher-power User Equipment (HPUEs) for range extension in areas designed for lower-power User Equipment (LPUEs) leads to uplink interference concerns, causing HPUEs to reach Maximum Output Power prematurely, which limits coverage gains and degrades overall uplink performance.
Innovation Solution
Adjusting mobility handoff parameters based on the power class of wireless devices, including calculating power class deltas and applying these to set handoff trigger points, to optimize handoff decisions and extend coverage without unnecessary interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If HPUEs are deployed for range extension in areas designed for LPUEs, then coverage and throughput for HPUEs are improved, but uplink interference noise rises and degrades overall uplink performance
Solution Approach 1:
The patent changes the handoff trigger parameters specifically for HPUEs based on their power class capabilities. By adjusting the handoff trigger point (e.g., RSRP threshold) according to the device's maximum output power, the system allows HPUEs to maintain connection longer in areas designed for LPUEs, thereby extending coverage without causing excessive uplink interference that would occur with standard handoff parameters.
2Reliability
If handoff parameters are set for LPUEs, then handoff decisions work correctly for LPUEs, but HPUE capabilities are not fully exploited and coverage gains are unnecessarily limited
Solution Approach 1:
The patent applies local quality by differentiating handoff parameters based on device power class. Instead of using uniform handoff parameters for all devices, the system configures specific handoff trigger points for HPUEs that are tailored to their higher power capabilities, while maintaining appropriate parameters for LPUEs. This ensures each device type operates optimally within its capability range.
Solution Approach 2:
The system dynamically adjusts handoff parameters based on the power class of the wireless device. The access node determines whether a device is an HPUE or LPUE and applies corresponding handoff trigger thresholds, making the handoff behavior adaptive to device capabilities rather than static for all devices.
3Stability of the object's composition
If handoff trigger threshold is established based on common power class, then handoff decisions are consistent across devices, but devices with different power classes cannot extend coverage beyond designed limits
Solution Approach 1:
The patent modifies the handoff trigger threshold parameter based on the power class of the wireless device. HPUEs receive adjusted handoff parameters that reflect their higher power capabilities, allowing them to extend coverage beyond what was originally designed for LPUEs, while LPUEs continue to use the original threshold for consistency.
Data Source
AI summary
Systems and methods are described for extending coverage of a wireless device. A handover trigger threshold may be established for a plurality of wireless devices located in a coverage area of an access node. An attachment request may be received at the access node from at least one wireless device having a power class different from a common power class of the plurality of wireless devices. Based on the reported power class, the access node may adjust a handover trigger threshold for the at least one wireless device. The access node may instruct the at least one wireless device to extend its coverage until the adjusted handover trigger threshold is met.