Permanent Random Access Channels for M2M Energy Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current cellular wireless communication systems are not well-suited for Machine-to-Machine (M2M) applications due to high electrical consumption and inefficiencies in managing terminal mobility, particularly in establishing connections and updating location information.
Innovation Solution
A wireless communication system with permanent physical random access channels that use a single radio resource throughout a geographical region, allowing terminals to spontaneously emit random access messages without time synchronization and reducing the need for frequent network listening, and a method for managing terminal mobility by updating location information using a single random access message.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If terminals use conventional coordinated access channels with time-synchronized random access, then connection establishment is reliable, but electrical consumption increases and terminal complexity increases
Solution Approach 1:
The system segments the access network into two independent parts: coordinated base stations for data exchange and random access base stations for connection establishment. This segmentation allows terminals to use simple random access procedures with permanent physical random access channels, reducing electrical consumption while maintaining connection reliability through dedicated infrastructure for each function.
Solution Approach 2:
Random access base stations act as intermediaries that receive random access messages from terminals and forward connection requests to coordinated base stations. This intermediary role enables terminals to establish connections through simplified procedures without needing to directly interact with coordinated base stations, reducing terminal complexity and energy consumption.
2Use of energy by moving object
If terminals frequently listen to physical diffusion channels for synchronization and parameter updates, then connection reliability is maintained, but electrical consumption increases
Solution Approach 1:
Terminals autonomously select permanent physical random access channels based on their own determination of random access base station locations, without needing to frequently listen to physical diffusion channels for parameter updates. This self-service approach significantly reduces electrical consumption while maintaining connection reliability through the permanent nature of the random access channels.
3Ease of operation
If multiple messages are exchanged for terminal identification and authentication, then security is enhanced, but the number of operations increases terminal complexity
Solution Approach 1:
The system extracts the identification and authentication functions from the multi-message coordinated access procedure and consolidates them into a single random access message transmitted on permanent physical random access channels. This extraction simplifies terminal operations while maintaining identification reliability through the dedicated random access infrastructure.
4Use of energy by moving object
If conventional physical random access channels are used with time intervals and radio resource reservations, then interference is managed, but terminal operations become complex and energy consumption increases
Solution Approach 1:
Permanent physical random access channels are pre-configured with dedicated radio resources and time availability across the geographical region, eliminating the need for terminals to perform complex procedures for resource selection and time synchronization. This preliminary configuration reduces both terminal complexity and electrical consumption while managing interference through dedicated resource allocation.
Data Source
AI summary
A wireless communication system including a cellular access network connected to a cellular network core, the cellular access network including cellular base stations adapted to exchange data with terminals on physical channels, called coordinated access channels, each cellular base station serving a geographical area, all the geographical areas served by the cellular base stations forming a geographical region. The wireless communication system includes random access base stations serving the geographical region, each random access base station being adapted to receive data emitted by terminals on a permanent physical channel, called random access channel, the permanent physical random access channels of the random access base stations using the same radio resources throughout the geographical region.