MSG3 Channel Access Type Determination in eLAA Random Access
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Solution Overview
Problem
The existing technologies do not define a channel access type for Enhanced LAA (eLAA), which is necessary for efficient data transmission in unlicensed spectra, particularly for determining the appropriate channel access priority for Message 3 (MSG3) in wireless communication systems.
Innovation Solution
A method is provided to determine the channel access type for MSG3 based on the indication of a random access response and/or network side configuration, using reserved bits in the subheader or payload of the random access response, and RRC signaling to configure and indicate different channel access priorities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If no channel access type is defined in Enhanced LAA (eLAA), then the protocol design remains simple, but the terminal device cannot determine the appropriate channel access priority for MSG3, resulting in reduced access efficiency
Solution Approach 1:
The patent segments the channel access type indication into different parts: type1 access channel priority is indicated through reserved bits in the subheader of Random Access Response (RAR), while type2 access channel priority is indicated through reserved bits in the payload of RAR. This segmentation allows the terminal to determine appropriate channel access priorities without requiring a completely new protocol design, thus improving access efficiency while controlling protocol complexity.
Solution Approach 2:
The patent makes the Random Access Response message universal by enabling it to carry multiple types of channel access priority indications (both type1 and type2) within the same message structure. The terminal can interpret different access channel priorities based on the service conditions and QoS requirements, allowing a single RAR message to serve multiple access scenarios without increasing overall protocol complexity.
2Adaptability or versatility
If a single channel access priority is used for all services, then the protocol is simple to implement, but services with different QoS requirements cannot be differentiated, reducing system adaptability
Solution Approach 1:
The patent applies local quality by differentiating channel access priorities based on local service conditions and QoS requirements. The terminal determines whether to use type1 or type2 access channel priority according to the specific service characteristics and network configuration. This allows high-priority services to receive preferential treatment while maintaining simple protocol implementation for standard services, thus achieving service differentiation without excessive complexity.
Solution Approach 2:
The patent introduces dynamic channel access priority selection where the terminal can switch between type1 and type2 access priorities based on real-time service conditions and network feedback. The network can dynamically configure different access priorities through RAR messages, allowing the system to adapt to changing traffic patterns and QoS requirements without requiring complex static configuration for every possible service scenario.
Data Source
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AI summary
Provided by the embodiments of the present invention are a method for indicating channel access type, a terminal device, a network device, a chip, a computer readable storage medium, a computer program product, and a computer program, which enable a terminal side to be able to determine the channel access type of msg3; the method comprises: according to a random access response indication and/or according to network side configurations, determining the channel access type of msg3.