Frequency Overlay Paging Message Allocation
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Solution Overview
Problem
In frequency overlay communication systems, the inefficient use of advanced frequency bands for paging messages leads to increased license costs and potential message collisions, as existing systems transmit paging messages over all frequency bands, despite the mobile station only needing to receive on a single band.
Innovation Solution
Implementing a method where the Base Station determines and transmits paging messages only on a specific Frequency Allocation Block (FAB) chosen based on the last accessed FAB by the mobile station, using an FAB determination algorithm to optimize resource usage and prevent collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If paging messages are transmitted over all frequency bands used by the advanced BS, then legacy MS can receive the paging message reliably, but frequency band efficiency deteriorates and license costs increase
Solution Approach 1:
The frequency bands are divided into multiple Frequency Allocation Blocks (FABs), and paging messages are transmitted only on specific FABs determined by a hashing function based on the MS's identity. This segmentation allows the system to transmit paging messages on a subset of frequency bands rather than all bands, improving frequency efficiency while maintaining reliable delivery.
Solution Approach 2:
Different FABs are assigned to different MSs based on their identities through a deterministic hashing function. Each MS monitors only the FAB assigned to it, creating a localized reception strategy that improves overall system efficiency while ensuring each MS can reliably receive its own paging messages.
2Adaptability or versatility
If paging messages are transmitted over all frequency bands, then all legacy MS can be reached, but message collisions increase and resource wastage occurs
Solution Approach 1:
The set of frequency bands is segmented into multiple FABs, and the hashing function distributes different MSs to different FABs. This segmentation reduces the probability of multiple MSs receiving paging messages on the same FAB simultaneously, thereby reducing message collisions and resource wastage while maintaining comprehensive coverage.
Solution Approach 2:
The system changes the parameter of paging message transmission from broadcasting on all frequency bands to targeted transmission on specific FABs determined by MS identity. This parameter change reduces resource wastage and message collisions while maintaining the ability to reach all legacy MS through the deterministic assignment mechanism.
3Loss of energy
If a specific FAB is selected for paging message transmission, then frequency efficiency improves, but the system must determine which FAB to use
Solution Approach 1:
The MS determines its own assigned FAB autonomously using a hashing function based on its identity and the total number of FABs. This self-service mechanism eliminates the need for the BS to explicitly assign FABs to each MS, reducing signaling overhead and system complexity while maintaining efficient frequency utilization.
Solution Approach 2:
The system uses the MS's identity as feedback to deterministically determine the assigned FAB through a hashing function. This feedback mechanism ensures that each MS can independently calculate its assigned FAB without requiring complex centralized assignment, balancing frequency efficiency with system simplicity.
Data Source
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AI summary
An apparatus and method for transmitting/receiving a paging message in a frequency overlay communication system are provided. The method includes determining if information is to be transmitted to a Mobile Station (MS) that is in an idle state, determining a sub frequency band for allocation to the MS, and transmitting a paging message to the MS using the determined sub frequency band.