Base Station Power Boost Mode for MTC Device Access
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Solution Overview
Problem
Terminal devices in coverage-limited locations struggle to access wireless telecommunications systems reliably due to insufficient power boosting capabilities in base stations, leading to inefficient camp-on attempts and increased interference.
Innovation Solution
A method for terminal devices to receive indications of base station power boost mode support, allowing them to control acquisition and delay access until power boosting is available, thereby reducing unnecessary attempts and improving coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a base station increases transmission power to improve coverage for terminal devices in coverage-limited locations, then coverage reliability is improved, but interference in neighbouring communication cells increases
Solution Approach 1:
The base station segments its transmission power across different frequency resources. Instead of uniformly increasing power across the entire bandwidth, it concentrates power on a restricted subset of frequency resources (power boosted resources) allocated specifically for coverage-limited terminal devices, while maintaining lower power on other resources to minimize overall interference.
Solution Approach 2:
The base station applies different transmission power levels to different frequency resources. Power boosted resources receive enhanced power for serving coverage-limited devices, while non-boosted resources operate at normal power levels. This localized power enhancement improves coverage reliability without proportionally increasing interference across the entire frequency spectrum.
2Loss of energy
If a base station concentrates transmission power on a subset of frequency resources for coverage-limited devices, then power efficiency is improved, but device complexity increases due to power boost mode indication mechanisms
Solution Approach 1:
The base station provides feedback to terminal devices about power boost availability through system information blocks and camp-on procedure indications. This feedback mechanism allows terminal devices to adapt their behavior (e.g., delaying camp-on attempts) without requiring complex internal power management circuits, thus improving power efficiency with minimal added device complexity.
Solution Approach 2:
The base station announces power boost availability in advance through system information broadcasting before terminal devices attempt to access the network. This preliminary indication allows terminal devices to prepare accordingly (e.g., by delaying camp-on attempts until power boost is available), reducing unnecessary power consumption without requiring complex real-time decision-making at the device level.
3Speed
If terminal devices continuously attempt camp-on procedures without knowing power boost availability, then access speed is maintained, but power wastage increases
Solution Approach 1:
The base station broadcasts power boost availability information in advance through system information blocks during idle periods. Terminal devices receive this information beforehand and can delay camp-on attempts until power boost is actually available, avoiding unnecessary power consumption while maintaining the ability to access the network quickly when conditions are favorable.
Solution Approach 2:
The network provides feedback to terminal devices about power boost status through downlink transmissions. This feedback mechanism enables terminal devices to make informed decisions about when to attempt camp-on procedures, reducing power wastage from unsuccessful attempts while preserving fast access capability when power boost is available.
Data Source
AI summary
A wireless telecommunication system includes base stations for communicating with terminal devices. One or more base stations support a power boost operating mode in which a base station's available transmission power is concentrated in a subset of its available transmission resources to provide enhanced transmission powers as compared to transmission powers on these transmission resources when the base station is not operating in the power boost mode. A base station establishes an extent to which one or more base stations in the wireless telecommunications system supporting the power boost operating mode conveys an indication of this to a terminal device. The terminal device receives the indication and uses the corresponding information to control its acquisition of a base station of the wireless telecommunication system, for example by taking account of which base stations support power boosting and/or when power boosting is supported during a cell attach procedure.