Hybrid Access Terminal EVDO Transition Optimization
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Solution Overview
Problem
In CDMA 1X/EVDO hybrid access terminals, redundant data calls occur when transitioning between CDMA 1X and EVDO systems, leading to battery drain and network resource wastage due to unsuccessful signal acquisitions and frequent reconnections in boundary areas.
Innovation Solution
Implementing methods to block redundant data calls by checking the success of system transitions, setting signal strength thresholds, and monitoring the radio frequency environment to delay connections until conditions are conducive, along with using fast dormancy to conserve battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the hybrid access terminal periodically monitors for EVDO system availability and attempts transition whenever EVDO signal is detected, then the terminal can access higher data rates and voice capabilities, but redundant data calls are made when transition fails, wasting battery life and network resources
Solution Approach 1:
The patent applies preliminary action by checking whether the terminal is currently in a data call state before attempting EVDO transition. The network determines the terminal's current state (data call active or not) and uses this information to decide whether to allow transition or block the data call. This prevents redundant data calls from being made when the terminal is not actually needing data service, thereby conserving battery life while still allowing EVDO access when needed.
2Adaptability or versatility
If the hybrid access terminal frequently attempts to transition between CDMA 1X and EVDO systems in boundary areas, then the terminal can adapt to signal variations, but unnecessary data calls are initiated causing network resource wastage
Solution Approach 1:
The patent applies feedback by implementing a mechanism where the network receives information about the terminal's current state (whether in data call or not) and uses this feedback to make informed decisions about allowing transitions. The network's determination of terminal state provides feedback that prevents unnecessary data calls during transitions in boundary areas, improving network resource efficiency while maintaining terminal adaptability.
3Reliability
If the hybrid access terminal initiates data calls during transition to establish packet data session, then the data session can be reconnected to the new system, but redundant calls are made when transitioning back to previous system
Solution Approach 1:
The patent applies preliminary action by having the network determine the terminal's current state (data call active or not) before allowing transition. This preliminary determination prevents the terminal from initiating redundant data calls when transitioning back to the previous system, as the network can identify that the terminal is not in a data call state and block the redundant call accordingly.
Data Source
AI summary
A method and apparatus of optimizing transitioning between EVDO and CDMA 1X systems in a hybrid access terminal, the method having the steps of: detecting an EVDO received signal at the hybrid access terminal; and delaying a connection timer at the hybrid access terminal for connecting to the EVDO system. The apparatus being a hybrid access terminal adapted for optimizing transitioning between EVDO and CDMA 1X systems, the hybrid access terminal having a radio subsystem adapted to communicate with a network; a radio processor having a digital signal processor and adapted to interact with the radio subsystem; memory; a user interface; a processor adapted to run user applications and interact with the memory, the radio and the user interface and adapted to run applications, the hybrid access terminal characterized by having means for: detecting an EVDO received signal at the hybrid access terminal; and delaying a connection timer at the hybrid access terminal for connecting to the EVDO system.