Paging Method for MTC Terminals in Challenging Environments
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Solution Overview
Problem
MTC terminals in challenging environments, such as underground or within buildings, often fail to receive paging messages due to signal attenuation, leading to missed calls and degraded user experience, with existing retransmission methods resulting in significant delays and unreliable coverage.
Innovation Solution
A paging method where the base station repeatedly pages MTC terminals requiring coverage enhancement in specific sub-frames or according to a shorter repeated paging cycle, allowing the terminal to determine the paging message from initial and repeated information, thereby improving success ratios and reducing missed calls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station uses traditional single paging transmission, then the system maintains low complexity and fast transmission, but MTC terminals in challenging environments (underground, buildings) fail to receive paging messages due to signal attenuation
Solution Approach 1:
The base station transmits paging messages periodically at multiple time points including initial paging and repeated paging in subsequent sub-frames or paging cycles. This periodic transmission ensures that terminals in challenging environments can receive the paging message during a transmission that penetrates the signal blockage, thereby improving reception reliability without requiring complex adaptive modulation or beamforming techniques
Solution Approach 2:
The base station performs preliminary identification of terminals requiring coverage enhancement before paging transmission. Terminals report their coverage status in advance, allowing the base station to prepare and transmit repeated paging messages proactively, ensuring reliable delivery before the terminal needs to respond to the paging
2Reliability
If the base station implements repeated paging transmission for coverage enhancement, then paging success ratio improves for MTC terminals, but significant delays occur in the paging process
Solution Approach 1:
The base station dynamically adjusts the paging repetition strategy based on terminal feedback and channel conditions. When a terminal indicates poor coverage, the base station activates repeated paging transmissions with adaptive timing, allowing the system to balance reliability improvement against delay introduction. The repetition count and timing are optimized based on the specific terminal's needs rather than applying uniform repeated transmission to all terminals
Solution Approach 2:
The terminal reports its coverage status in advance before paging occurs, allowing the base station to pre-configure the optimal paging transmission strategy. This preliminary action enables the system to minimize delays by preparing the appropriate number of repetitions and timing beforehand, rather than adding delay-reactively after paging failures are detected
3Reliability
If the base station pages all terminals using standard paging cycles, then system-wide paging coverage is maintained, but MTC terminals in coverage enhancement scenarios experience missed calls due to signal attenuation
Solution Approach 1:
The base station applies different paging transmission strategies to different terminal groups based on their coverage characteristics. Terminals reporting poor coverage receive repeated paging transmissions with enhanced reliability, while terminals with good coverage use standard paging procedures. This localized differentiation improves overall system efficiency and reliability without requiring complex mechanisms for all terminals
Solution Approach 2:
Terminals autonomously report their coverage status and receive capability information, enabling the base station to automatically adjust paging strategies without manual intervention or complex centralized control. The terminal essentially services its own paging needs by providing feedback that triggers appropriate base station responses
4Area of stationary object
If the network deploys additional equipment and infrastructure to extend coverage to challenging environments, then coverage area increases, but deployment cost and network planning complexity increase significantly
Solution Approach 1:
The base station changes transmission parameters such as repetition count, timing, and power allocation dynamically based on terminal feedback and channel conditions. This parameter adaptation allows existing network infrastructure to effectively extend coverage to challenging environments like underground areas and buildings without requiring additional physical equipment or infrastructure deployment
Solution Approach 2:
The repeated paging mechanism serves multiple functions: it provides coverage extension for challenging environments, maintains backward compatibility with standard terminals, and adapts to varying channel conditions. This multi-functionality allows the same mechanism to benefit both coverage enhancement scenarios and normal operation, maximizing the utility of existing network resources
Data Source
AI summary
Disclosed are a paging method, paging message obtaining method, base station, and terminal, relating to the telecommunication technology. For a terminal requiring enhanced coverage, upon paging, repeating the paging in at least one paging cycle including the current paging cycle, such that the terminal requiring enhanced coverage determines the paging message by combining the content received during the first paging and the repeated paging, thereby reducing the occurrences of situations in which the terminal misses the paging and cannot be called.