Hybrid BTS Spectrum Sharing Broker for UMTS and WiMax Coexistence
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently sharing limited spectrum resources, as different standards like 3GPP/UMTS and WiMax have distinct spectrum requirements and masks, making coexistence and spectrum sharing difficult due to stringent compatibility issues.
Innovation Solution
A network-oriented software-defined radio system with a hybrid BTS that includes both 3GPP/UMTS and WiMax transceivers, utilizing a broker to dynamically allocate time slots and frequency sub-bands, and modifying WiMax OFDM symbol structures to meet 3GPP/UMTS spectrum mask requirements by reserving and stuffing zeros, allowing for spectrum sharing without hardware modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different wireless standards (3GPP/UMTS and WiMax) use separate spectrum allocations, then each standard can maintain its own spectrum mask requirements, but spectrum efficiency is reduced due to unused bandwidth
Solution Approach 1:
The patent merges 3GPP/UMTS and WiMax systems into a single hybrid BTS that shares the same spectrum resource. The broker combines spectrum allocation decisions for both standards, allowing them to coexist in the same frequency band while maintaining各自的 spectrum mask requirements through coordinated resource management.
Solution Approach 2:
The hybrid BTS is designed with multi-functionality to support both 3GPP/UMTS and WiMax standards simultaneously. A single transceiver system performs multiple functions by dynamically allocating spectrum resources to different standards based on demand, eliminating the need for separate dedicated systems.
2Adaptability or versatility
If WiMax OFDM symbols are modified to meet 3GPP/UMTS spectrum mask requirements, then spectrum sharing becomes possible, but WiMax signal structure is altered
Solution Approach 1:
The patent applies dynamic modifications to WiMax OFDM symbols through the broker, which adjusts signal parameters in real-time based on spectrum sharing requirements. The modification is dynamic rather than static, allowing the system to adapt signal structure temporarily for coexistence while maintaining original structure when sharing is not required.
Solution Approach 2:
The broker acts as an intermediary between WiMax signal generation and 3GPP/UMTS spectrum requirements. It mediates the conflict by modifying WiMax OFDM symbols to meet spectrum mask requirements, enabling spectrum sharing without direct conflict between the two standards' structural requirements.
3Adaptability or versatility
If a hybrid BTS with both 3GPP/UMTS and WiMax transceivers is implemented, then spectrum sharing is enabled, but system complexity increases
Solution Approach 1:
The hybrid BTS is designed as a universal platform that can handle both 3GPP/UMTS and WiMax traffic through a single architecture. The broker provides a unified resource management layer that simplifies the complexity by presenting a single control interface for managing multiple standards, rather than requiring separate independent systems.
Solution Approach 2:
The broker serves as an intermediary management layer that abstracts the complexity of managing two different standards. It handles the complex tasks of spectrum allocation, signal modification, and coordination between 3GPP/UMTS and WiMax components, allowing the rest of the system to operate with simplified interfaces.
Data Source
AI summary
There is provided a system and method for sharing a wireless spectrum compromising a first transceiver for establishing the communication channels within the allocated bandwidth using a first protocol, a broker for determining the unused bandwidth within the allocated bandwidth, and a second transceiver for establishing the further communication channels within the unused allocated bandwidth using a second protocol. The first protocol is UMTS and the second protocol is WiMax. The broker may monitor UMTS traffic and allocate bandwidth to WiMax traffic whenever resources are idle or traffic are low or allocate bandwidth in dependence upon time division multiplexing, or frequency division multiplexing or may overlap a WiMax signal with a UMTS signal.