Base Station Physical Broadcast Channel Search Space Selection
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Solution Overview
Problem
Current LTE technologies require initial connection establishment on a backward compatible component carrier, making it difficult for mobile station devices to establish connections on non-backward compatible component carriers, which hinders spectral efficiency improvements.
Innovation Solution
A base station device transmits information to instruct mobile station devices to monitor either a common or enhanced common search space for physical downlink channels, using physical broadcast channels and downlink shared channels to facilitate initial connection establishment on both backward and non-backward compatible component carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If initial connection establishment is required on backward compatible component carriers, then compatibility with existing LTE systems is maintained, but spectral efficiency is reduced due to inability to establish connections on non-backward compatible carriers
Solution Approach 1:
The patent segments the connection establishment process into two phases: initial connection establishment on backward compatible component carriers, and subsequent addition of non-backward compatible component carriers. This allows the system to maintain compatibility requirements while enabling spectral efficiency improvements through selective carrier usage.
Solution Approach 2:
The patent performs preliminary action by establishing the initial connection on backward compatible carriers before introducing non-backward compatible carriers. This preliminary establishment ensures compatibility is maintained while creating the foundation for subsequent spectral efficiency improvements.
2Productivity
If non-backward compatible component carriers are introduced to improve spectral efficiency, then spectral efficiency is improved, but initial connection establishment becomes difficult on these carriers
Solution Approach 1:
The patent performs preliminary action by establishing the initial connection on backward compatible carriers before introducing non-backward compatible carriers. This preliminary establishment ensures compatibility is maintained while creating the foundation for subsequent spectral efficiency improvements.
Solution Approach 2:
The patent uses backward compatible component carriers as an intermediary to facilitate the introduction of non-backward compatible carriers. The initial connection on compatible carriers serves as a mediator that enables subsequent addition of incompatible carriers for spectral efficiency gains.
3Adaptability or versatility
If multiple search spaces are supported for different component carrier types, then both backward and non-backward compatible carriers can be used, but device complexity increases
Solution Approach 1:
The patent segments the search space monitoring into distinct common search spaces for backward compatible carriers and enhanced common search spaces for non-backward compatible carriers. This segmentation allows the mobile station to monitor different search spaces based on carrier type, reducing the complexity of simultaneously supporting both types without requiring unified monitoring of all carriers.
Data Source
AI summary
A base station device that communicates with a mobile station device is provided. The base station device uses a physical broadcast channel to transmit information instructing the mobile station device to monitor a common search space or an enhanced common search space for a physical downlink channel.