RACH Resource Set Configuration for Mixed-Bandwidth Terminal Access
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Solution Overview
Problem
Existing network devices struggle to efficiently connect terminals of varying bandwidth types due to the use of uniform RACH resource configuration, leading to connectivity issues for some terminals.
Innovation Solution
A method where network devices configure multiple RACH resource sets based on terminal types, which are determined by bandwidth and random access types, allowing terminals to initiate random access procedures using appropriate resources, thereby improving connectivity for diverse bandwidth types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uniform RACH resource configuration is used for all terminals, then device complexity is reduced and ease of operation is improved, but connectivity reliability deteriorates for terminals with limited bandwidth capabilities
Solution Approach 1:
The patent segments the unified RACH resource configuration into terminal-specific configurations based on bandwidth capabilities. The network device determines different RACH resource sets for different terminal types (e.g., narrowband IoT terminals vs. wideband terminals), allowing each terminal to use appropriately configured resources that match its bandwidth capabilities, thereby improving connectivity reliability without requiring a completely new system architecture.
Solution Approach 2:
The patent applies local quality by customizing RACH resource configuration parameters (such as subcarrier spacing, cyclic prefix length, and resource block allocation) according to the specific bandwidth capabilities of different terminal types. Each terminal type receives locally optimized configuration parameters that are tailored to its performance characteristics, ensuring optimal connectivity for each category while maintaining overall system manageability.
2Reliability
If separate RACH resource configurations are provided for different terminal types, then connectivity reliability is improved, but device complexity and configuration management difficulty increase
Solution Approach 1:
The patent implements self-service by enabling terminals to autonomously identify their own bandwidth capability category and select the appropriate RACH resource configuration from the set of configured options. The terminal reads its own capability parameters, matches them against the configured terminal types, and automatically applies the correct configuration without requiring manual intervention or complex network-side assignment, thereby simplifying configuration management while maintaining reliability.
Solution Approach 2:
The patent applies preliminary action by pre-configuring multiple RACH resource sets in the network device, each associated with specific terminal type characteristics. This preliminary preparation allows terminals to quickly and easily select their appropriate configuration without real-time complex decision-making, reducing configuration management overhead while ensuring reliable connectivity from the outset.
Data Source
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AI summary
This application provides a random access method, an apparatus, and a system. The method includes: A network device determines M RACH resource sets, where the M RACH resource sets correspond to N terminal types, the N terminal types are determined based on bandwidth types and/or random access types of terminals, and M and N are positive integers; and then sends RACH configuration information to at least one terminal, where the RACH configuration information indicates the M RACH resource sets, the M RACH resource sets are used by the at least one terminal to send a random access request to the network device, and a bandwidth type of any one of the at least one terminal belongs to the bandwidth types for determining the N terminal types. According to the technical solution of this application, terminals of various bandwidth types can be more efficiently connected to the network device.