Selective Broadband Forward Link for Wireless Data
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Solution Overview
Problem
Current wireless telecommunications systems, such as 1xEV-DO, face limitations in providing additional bandwidth for high-rate packet data communications, necessitating enhanced resource allocation strategies.
Innovation Solution
A method and system that selectively use a broadband forward link by configuring radio access networks with either a symmetric or asymmetric frequency division duplex (FDD) configuration based on communication session types and service level subscriptions, utilizing non-overlapping forward link frequency bands with varying bandwidths to optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a conventional symmetric FDD configuration is used, then infrastructure requirements are minimized and resource usage is efficient, but additional bandwidth for high-rate packet data communications is limited
Solution Approach 1:
The system dynamically switches between symmetric and asymmetric FDD configurations based on the type of communication session. For high-rate packet data sessions, the asymmetric configuration with additional broadband forward link is activated, while conventional symmetric configuration is used for other sessions. This dynamic adaptation allows the system to provide additional bandwidth when needed without permanently increasing infrastructure complexity.
Solution Approach 2:
The invention applies different frequency bandwidth characteristics to different parts of the communication system selectively. The asymmetric FDD configuration provides enhanced forward link bandwidth specifically for high-rate packet data communications, while maintaining conventional symmetric configuration for other services. This localized enhancement of bandwidth where needed resolves the contradiction between providing additional bandwidth and maintaining simple infrastructure.
2Productivity
If an additional broadband forward link is added, then high-rate packet data communication capability is enhanced, but resource allocation complexity increases
Solution Approach 1:
The system pre-configures multiple FDD configurations (symmetric and asymmetric) with different bandwidth characteristics before actual communication sessions begin. The Base Station Controller is pre-programmed with the capability to select appropriate configurations based on session types. This preliminary preparation of configuration options allows for quick and simple resource allocation when high-rate packet data communications are needed, without increasing operational complexity.
Solution Approach 2:
The invention changes the frequency bandwidth parameter of the forward link by switching between different FDD configurations. The Base Station Controller modifies the operating parameters (frequency bands, bandwidth) based on the detected session type. This parameter change approach allows the system to enhance data communication rates for high-rate packet data sessions while maintaining simple resource allocation through automated parameter adjustment rather than complex reconfiguration.
3Quantity of substance
If asymmetric FDD configuration is used for all sessions, then high bandwidth is always available, but efficient resource usage is compromised
Solution Approach 1:
The system dynamically adapts the FDD configuration based on the actual communication session requirements. The Base Station Controller evaluates the session type and selectively activates either the symmetric or asymmetric FDD configuration. This dynamic selection ensures that high bandwidth asymmetric configuration is only deployed when high-rate packet data communications are needed, while conventional symmetric configuration is used for other sessions, thereby maintaining efficient resource usage overall.
Solution Approach 2:
Instead of universally applying the asymmetric FDD configuration with its enhanced bandwidth to all sessions, the system applies this enhanced configuration only partially - specifically to high-rate packet data sessions that require it. For other session types, the conventional symmetric configuration is used. This partial application of the enhanced bandwidth feature resolves the contradiction by providing high bandwidth where actually needed while avoiding waste of resources on sessions that do not require it.
Data Source
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AI summary
A radio access network has a reverse link frequency band for receiving signals from mobile stations and has first and second forward link frequency bands for transmitting signals to mobile stations. The second forward link frequency band has a greater frequency bandwidth than the first forward link frequency band and occupies a different part of the radio frequency spectrum. For certain types of communication sessions, such as voice and low-speed data, the reverse link frequency band and the first forward link frequency band are used. For other types of communication sessions, such as high-speed data and streaming video, the reverse link frequency band and the second forward link frequency band are used.