Cross Carrier Random Access Configuration for Wireless Communication
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing random access procedures across different frequency bands, particularly in scenarios where licensed and unlicensed spectrum bands are used together, leading to complexities in channel access and network load distribution.
Innovation Solution
The implementation of a mechanism that allows base stations to transmit system information signals indicating random access configurations for both licensed and unlicensed frequency bands, enabling wireless communication devices to perform random access procedures based on these configurations, using a common unlicensed band for uplink communications and distinguishing between different downlink channels to optimize channel usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If random access procedures are performed separately for each frequency band, then configuration management becomes simple, but signaling overhead increases and access efficiency decreases
Solution Approach 1:
The patent merges random access configuration management by allowing a single frequency band (first frequency band) to provide system information that configures random access procedures for multiple frequency bands (second and third frequency bands). This consolidation reduces the number of separate configuration messages needed while maintaining the ability to optimize access parameters for each band individually.
Solution Approach 2:
The system implements multi-functionality by enabling system information transmitted in one frequency band to serve multiple purposes: configuring random access for the transmitting band itself and also configuring random access for other frequency bands. This universal approach allows a single transmission to benefit multiple bands, reducing overall signaling overhead.
2Reliability
If system information is transmitted in multiple frequency bands, then random access configuration availability improves, but transmission overhead and device processing complexity increase
Solution Approach 1:
The patent applies preliminary action by transmitting system information containing random access configurations in advance through frequency bands that are likely to be used for access. By pre-configuring multiple frequency bands through information transmitted in one or more bands, the system ensures that devices have the necessary configuration data before attempting random access, improving reliability without requiring complex real-time processing.
3Productivity
If licensed and unlicensed bands are used together, then network capacity and coverage improve, but channel access complexity and latency increase
Solution Approach 1:
The patent segments the random access configuration into band-specific parameters that can be independently optimized. By providing separate random access configurations for licensed and unlicensed frequency bands, the system allows different access strategies to be applied to each band type, managing the complexity of heterogeneous networks while maintaining high capacity through multi-band operation.
Data Source
AI summary
Wireless communications systems and methods related to communications in a network that supports data transmitted in an unlicensed frequency band and a licensed frequency band are provided. A first wireless communication device transmits in a first frequency band, a first system information signal indicating a first random access configuration for a second frequency band. The first wireless communication device transmits in a third frequency band, a second system information signal indicating a second random access configuration for the second frequency band. The first and third frequency bands are different frequency bands. Additionally, the first wireless communication device performs with a second wireless communication device, a random access procedure based on at least one of the first random access configuration or the second random access configuration.