Gold Code Generation for WCDMA Handoff

Solution Overview

Problem

WCDMA systems face challenges in efficient Gold code generation and management, particularly during handoffs between base stations using different frequencies, which requires additional synchronization circuitry, increasing costs for mobile handsets.

Innovation Solution

A method and system for generating and managing Gold codes that simultaneously produce scrambling code segments and their time-shifted versions, allowing for efficient synchronization and descrambling across multiple base stations without the need for additional circuitry.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If additional synchronization circuitry is added to handle handoffs between base stations using different frequencies, then the ability to communicate with multiple base stations is improved, but the device complexity and cost increase

Engineering Contradiction:

Improveability to communicate with multiple base stationsVSAvoidsynchronization circuitry

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies universality by designing a single synchronization mechanism that handles both same-frequency and different-frequency handoffs. The mobile station uses the same synchronization procedure regardless of whether the handoff is within the same frequency band or across different frequency bands, eliminating the need for separate synchronization circuitry for different scenarios.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the synchronization functions for different frequency handoffs into a single integrated process. By combining the synchronization procedures for same-frequency and different-frequency handoffs into one unified mechanism, the system reduces the overall complexity while maintaining the ability to handle both types of handoffs effectively.

Inventive Principle:

Principle #5Merging (Combining)

2Adaptability or versatility

If additional synchronization circuitry is added to handle handoffs between base stations using different frequencies, then the handoff capability is improved, but the cost for mobile handsets increases

Engineering Contradiction:

Improvehandoff capabilityVSAvoidcost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent applies universality by designing a single synchronization mechanism that handles both same-frequency and different-frequency handoffs. The mobile station uses the same synchronization procedure regardless of whether the handoff is within the same frequency band or across different frequency bands, eliminating the need for separate synchronization circuitry for different scenarios.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the synchronization functions for different frequency handoffs into a single integrated process. By combining the synchronization procedures for same-frequency and different-frequency handoffs into one unified mechanism, the system reduces the overall complexity while maintaining the ability to handle both types of handoffs effectively.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS8102900B2Method and apparatus for efficient gold code generation and management in WCDMA systems

Publication Date: 2012.01.24 AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE LTD

AI summary

A method and an apparatus for efficient Gold code generation and management in WCDMA systems are presented. Aspects of the method may include simultaneously generating, based on the codeword sequence, a plurality of scrambling code segments associated with a scrambling code. A plurality of scrambling code segments, where each is associated with a corresponding one of a plurality of scrambling codes, may also be simultaneously generated. The plurality of scrambling codes may form a scrambling code group. Based on the codeword sequence, a plurality of time shifted versions of at least one scrambling code segment associated with a scrambling code may also be simultaneously generated.