Cell Broadcast Channel Activation for MTC Paging Load Reduction
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Solution Overview
Problem
In machine-type communication wireless access networks, the existing location management procedures are inefficient for managing large numbers of terminals with low mobility, as they require frequent and precise location updates, leading to increased load on paging channels and limitations in activation instructions and identifiers.
Innovation Solution
A method and system for controlling terminal activation using broadcast messages on cell broadcast channels, which reduces the need for precise location updates and allows the use of network-unrelated identifiers, enabling targeted activation of terminals in specific subsets of cells, thereby reducing the load on paging channels and providing flexible activation parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing location management procedures are used for machine-type communication terminals, then terminals can be located and activated, but the load on paging channels increases and frequent location updates are required
Solution Approach 1:
The network is divided into location areas containing multiple cells, and further segmented into activation areas for targeted terminal activation. This segmentation allows the system to manage terminals at different hierarchical levels, reducing the need for network-wide paging operations and thereby reducing paging channel load while maintaining reliable terminal activation capability
Solution Approach 2:
A location server is introduced as an intermediary component that stores location information and coordinates terminal activation. The location server acts as a mediator between the network and terminals, managing location updates and activation procedures centrally, which reduces the burden on paging channels by pre-managing location data before activation is needed
2Measurement precision
If precise location updates are performed frequently for terminal activation, then terminal location accuracy is improved, but the complexity of location management increases
Solution Approach 1:
The system dynamically adjusts location update requirements based on terminal mobility characteristics. For machine-type communication terminals with low mobility, location updates are performed less frequently compared to mobile terminals. This dynamic approach maintains sufficient location accuracy for MTC applications while reducing the complexity of continuous location management
Solution Approach 2:
Different location update parameters and procedures are applied based on terminal type and mobility characteristics. The system changes parameters such as location update frequency, location area size, and activation area granularity to match the specific requirements of machine-type communication terminals, thereby maintaining location accuracy while simplifying management complexity
3Reliability
If network-related identifiers are used for terminal activation, then terminals can be identified in the network, but the flexibility of activation instructions is limited
Solution Approach 1:
The system supports multiple types of identifiers including network-related identifiers (IMSI, TMSI) and external identifiers (application layer identifiers, device identifiers). This multi-functionality allows the same activation mechanism to work with different identifier types, providing both reliable terminal identification within the network and flexible activation instructions from external sources without requiring separate systems
Data Source
AI summary
The invention relates to a method for controlling activation of at least one terminal in a machine-type communication application using a wireless access network. The wireless access network comprises a number of location areas, each of the location areas comprising a plurality of cells. The terminal has been assigned an identifier. First, a location identifier is received from a location provider, the location identifier indicating a subset of cells of at least one of the location areas. Activation of the at least one terminal is then controlled by transmitting at least one broadcast message on at least one cell broadcast channel in the cells of the subset indicated by the location identifier. The broadcast message contains the identifier or identifier part assigned to the terminal, such that the at least one terminal is signalled that the broadcast message is intended for him. An activation control system and a mobile terminal for use with such a system are also disclosed.