Carrier Frequency Assignment via Transmit Power Differentials
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Solution Overview
Problem
Wireless communication devices often face difficulties in performing soft handoffs due to high communication loads on base stations, which can prevent seamless carrier frequency transitions, especially when moving between base stations with different load conditions.
Innovation Solution
A method that determines transmit power differentials between carrier frequencies of two base stations and assigns the wireless communication device to a carrier frequency with a higher power differential, increasing the likelihood of successful soft handoffs by reducing noise and load on the initial base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wireless device performs soft handoff to maintain communication during base station transition, then communication reliability is improved, but the base station communication load increases and may prevent successful handoff
Solution Approach 1:
The system determines transmit power differentials between carrier frequencies of the current and target base stations before the handoff occurs. This preliminary assessment allows the network to pre-select an optimal carrier frequency that will minimize the impact on the target base station's communication load, enabling the soft handoff to proceed successfully without overwhelming the target base station.
Solution Approach 2:
The system changes the carrier frequency parameter during handoff based on transmit power differential calculations. By selecting a carrier frequency where the target base station has a higher transmit power (indicating lower load), the system dynamically adjusts the frequency parameter to optimize handoff success while managing the target base station's communication load capacity.
2Reliability
If the system assigns a carrier frequency with higher transmit power differential, then the likelihood of successful soft handoff increases, but the complexity of frequency assignment management increases
Solution Approach 1:
The base station autonomously determines its own transmit power levels on different carrier frequencies and calculates the power differentials without requiring complex external coordination. This self-service approach simplifies the overall system complexity by allowing each base station to independently manage its frequency assignment decisions based on its own power differential measurements, reducing the need for complex centralized control mechanisms.
Data Source
AI summary
Embodiments disclosed herein provide systems and methods for carrier frequency assignment based on transmit power differentials. In a particular embodiment, a method comprises determining first power levels of first carrier frequencies transmitted from a first wireless network base station and determining second power levels of second carrier frequencies transmitted from a second wireless network base station. The method further comprises determining transmit power differentials between the first power levels and the second power levels for corresponding ones of the first and second carrier frequencies. The method further comprises assigning a wireless communication device to one of the first carrier frequencies based on the transmit power differentials.