Single Wireless Receiver for Multi-Mode Handover
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Solution Overview
Problem
Conventional wireless mobile devices require separate receivers for each radio access technology mode, leading to redundancy, increased die area, and expense due to inherent architectural constraints, necessitating an improved method for inter-RAT handover between multiple modes.
Innovation Solution
A mobile station equipped with a single wireless receiver capable of operating in multiple modes, such as WCDMA and GSM, utilizing a multi-mode receiver architecture that eliminates the need for external inter-stage filters and enables efficient handover between modes using a single synthesizer, thereby reducing die area and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate receivers are used for each radio access technology mode, then handover between modes can be performed, but die area and cost increase due to redundancy
Solution Approach 1:
The patent combines multiple radio access technology receivers (WCDMA and GSM) into a single integrated receiver unit. This merging eliminates redundant components while maintaining the capability to perform handover between different modes, thereby reducing die area without sacrificing handover reliability
Solution Approach 2:
The single receiver is designed with multi-functionality to support multiple radio access technologies (WCDMA and GSM modes). By making the receiver universal, it can perform handover operations across different modes without requiring separate dedicated receivers for each technology, thus reducing overall die area while preserving full handover capability
2Reliability
If separate receivers are used for each radio access technology mode, then handover between modes can be performed, but expense increases due to redundancy
Solution Approach 1:
The patent merges multiple receivers into a single integrated unit, reducing the total component count and manufacturing complexity. This consolidation lowers production costs while maintaining the reliability of handover operations between different radio access technologies
Solution Approach 2:
By designing a universal receiver that supports multiple modes (WCDMA and GSM), the patent eliminates the need to manufacture and stock multiple separate receiver types. This multi-functional approach reduces manufacturing expenses through economies of scale and simplified production processes while preserving full handover capability
3Reliability
If external inter-stage filters are used in WCDMA receiver, then RF performance is improved, but device complexity increases
Solution Approach 1:
The patent integrates the filtering function directly into the receiver architecture, combining the inter-stage filter with other receiver components. This integration maintains the necessary RF performance for WCDMA operation while reducing device complexity by eliminating separate external filter components
Solution Approach 2:
The receiver is designed with built-in filtering capabilities that serve multiple functions: maintaining RF performance for WCDMA mode while also supporting GSM mode operations. This multi-functional integration eliminates the need for separate external inter-stage filters, thereby reducing device complexity while preserving RF performance
Data Source
AI summary
A method for performing handover between multiple modes for a mobile station is provided. The method includes operating the mobile station in a first mode. A handover from the first mode to a second mode is performed using a single wireless receiver. The mobile station operates in the second mode after performing the handover.