Random Access Resource Allocation via Preamble Mapping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The complexity and resource consumption in enhancing coverage for machine-type communication user equipment, such as smart meters, increase the implementation complexity of base stations during the random access process in wireless communication systems like LTE, particularly in challenging environments like basements or cell edges.
Innovation Solution
A method for predetermining resources in the random access process between user equipment and a base station, where preamble information is used to determine corresponding RAR resources through signaling or preset configurations, allowing for efficient allocation and reduction in resource consumption by configuring RAR resources for multiple preambles, thereby simplifying the random access process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If more resources (time, frequency, power, code) are consumed to improve signal quality for coverage enhancement, then coverage area is enhanced, but implementation complexity and resource consumption increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring the correspondence between preamble information and RAR resources before the random access process occurs. The base station and UE are provided with configured RAR resources and correspondence relationships in advance, so that during random access, the UE can directly determine which RAR resource to monitor based on its selected preamble, without requiring complex real-time resource allocation or signaling exchanges. This pre-configuration approach enables coverage enhancement through reliable random access while avoiding the complexity of dynamic resource management.
2Reliability
If more resources are consumed to ensure reliable random access transmission, then random access reliability is improved, but resource consumption and implementation complexity increase
Solution Approach 1:
The patent applies self-service by enabling the UE to autonomously determine the appropriate RAR resource to monitor based on the preamble information it selected and the pre-configured correspondence relationships. The UE independently identifies which RAR resource corresponds to its transmitted preamble without requiring additional signaling from the base station. This self-determination mechanism ensures reliable random access while minimizing resource consumption by avoiding redundant signaling overhead.
3Area of stationary object
If complex resource allocation and scheduling is implemented to enhance coverage, then coverage area is improved, but base station and UE implementation complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the RAR resources into multiple distinct resources (different time-frequency resources) that correspond to different preambles or preamble groups. The correspondence between preambles and RAR resources is segmented and pre-configured, allowing the base station to transmit RARs on different resources for different UEs simultaneously. This segmentation approach enables coverage enhancement through diversified resource usage while simplifying implementation by avoiding complex dynamic scheduling decisions.
Data Source
AI summary
Embodiments of the present disclosure relate to the communications field, and provide a method for predetermining a resource in random access, user equipment, and a base station, so that a process of random access can be simplified, and reliability of information transmission in the process of random access can be improved. The method is: an implicit manner is used to indicate some or all of identifiers of a random access preamble index; so that a message in a procedure of random access is simplified, and at the same time resources used for transmitting an RAR reply message, transmitting a contention resolution message, retransmitting an RAR reply message, and retransmitting a contention resolution message are configured by using signaling or preset by a system. The embodiments of the present disclosure are used for a process of random access.