Random Access Response MAC Sub-Headers for 2-Step RACH Overhead
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Solution Overview
Problem
Existing LTE and NR random access procedures face inefficiencies in signaling overhead due to the need to indicate various information types in random access responses, particularly in the context of the 2-step RACH process.
Innovation Solution
Utilizing MAC data sub-headers with predetermined indication bits to convey information about response and data messages, allowing for the reuse of multiple response formats and data messages within a single random access response message without additional indication bits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If multiple response formats and data messages are indicated in random access responses, then information completeness is improved, but signaling overhead increases
Solution Approach 1:
The patent combines multiple response formats (random access success response, fallback response, and data messages) into a single unified random access response message structure. By merging these previously separate indications into one message with a unified MAC data sub-header format, the system reduces the number of separate signaling messages while maintaining complete information about all response types and data messages included.
Solution Approach 2:
The MAC data sub-header is designed with universal applicability to indicate multiple different types of information (response message types, data message presence, message lengths) using a single standardized format. This multi-functional sub-header structure can universally represent various response formats and data messages without requiring separate indication mechanisms for each type.
2Measurement precision
If separate indication bits are used for each response format, then information precision is improved, but device complexity increases
Solution Approach 1:
The patent uses parameter changes within the MAC data sub-header to precisely indicate different response formats and message types. By varying specific parameters (indication bits, RAPID presence, message length fields) within the unified structure, the system achieves precise differentiation between response types (success response, fallback response, data messages) without adding complex separate indication mechanisms for each type.
Data Source
AI summary
The present disclosure provides an information processing method, an information processing device, an information processing apparatus and a computer-readable storage medium. The information processing method includes, in a random access procedure, transmitting a random access response message to a UE. The random access response message includes at least one MAC data sub-header, and the MAC data sub-header is used to indicate information about a response message and/or information about a data message included in the random access response message.