Random Access Procedure for Low-Capability Wireless Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing random access procedures in wireless communication systems are not optimized for Machine-Type Communication (MTC) devices, which have distinct features such as low mobility and low uplink data traffic, leading to inefficiencies and increased signaling overhead for base stations.
Innovation Solution
A method and apparatus for performing random access using pre-configured resources, including configuration information for random access resources, transmission of random access preambles, and scheduled messages, tailored for MTC devices or groups, which reduces signaling overhead and improves procedure efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing random access procedure is used for MTC devices, then compatibility with existing network is maintained, but signaling overhead increases and procedure efficiency decreases
Solution Approach 1:
The patent applies preliminary action by pre-configuring random access resources (time slots, frequency resources, power levels) for MTC devices before they need to access the network. This allows devices to perform random access without requiring complex real-time signaling from the base station, thereby reducing signaling overhead and improving procedure efficiency while maintaining network compatibility
2Reliability
If existing random access procedure is used, then network compatibility is maintained, but base station load increases
Solution Approach 1:
The base station pre-configures random access resources including time slots, frequency resources, and power levels for MTC devices. This preliminary configuration allows devices to autonomously select and transmit preambles without requiring complex real-time base station intervention, thereby maintaining network compatibility while reducing base station processing load and improving scalability
3Speed
If pre-configured random access resource is used, then random access speed is improved, but device complexity increases
Solution Approach 1:
The network side performs preliminary configuration of random access resources including time slots, frequency resources, and power levels, and transmits this configuration information to MTC devices. The devices then use these pre-configured resources to perform random access, which speeds up the procedure while actually simplifying device complexity compared to existing methods that require complex real-time resource selection and negotiation
Data Source
AI summary
A method and low-cost/low-capability (LC) device are provided for performing a random access procedure in a wireless communication system. The LC device receives configuration information for a random access procedure from a base station. The configuration information includes resource information for transmitting a random access preamble, and the resource information is specific to the LC device. The LC device transmits, to a base station, a random access preamble on a random access resource determined based on the resource information. The LC device receives a random access response in response to the random access preamble. The random access resource is configured for each region of a coverage of the base station.