Initial Access Channel Determination in Shared-Spectrum Wireless Links
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Solution Overview
Problem
The challenge of determining channel access for terminal devices during initial access procedures in new frequency bands such as 52.6GHz-71GHz or 71GHz-114.25GHz, particularly in shared spectrum scenarios, leads to ambiguity and affects the success rate and reliability of wireless communication.
Innovation Solution
A wireless communication method where a terminal device obtains indication information from a system message to determine whether a channel access procedure is required, allowing it to decide on the type of channel access scheme and short control information transmission, thereby clarifying the need for channel access procedures during initial access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channel access procedure is performed during initial access in new frequency bands, then spectrum sharing fairness is improved, but access delay and complexity increase
Solution Approach 1:
The patent implements dynamic channel access determination by introducing indication information that allows the terminal device to adaptively select between performing channel access procedure or skipping it based on network conditions and grant information, rather than following a fixed procedure for all cases
Solution Approach 2:
The network device provides indication information in advance through system messages or grant information, enabling the terminal device to determine the appropriate channel access approach before actual transmission, thereby avoiding unnecessary delays during the access process
2Measurement precision
If channel access parameter indication information is included in grant information, then channel access accuracy is improved, but information overhead and complexity increase
Solution Approach 1:
The patent applies channel access parameter indication information selectively based on local conditions - the indication is provided only when necessary through specific grant information or system messages, rather than universally for all transmissions, thereby reducing overall information overhead while maintaining accuracy where needed
Solution Approach 2:
The indication information mechanism serves multiple functions: it indicates whether channel access procedure should be performed, specifies the type of channel access scheme to use, and provides timing advance information, thereby consolidating multiple control functions into a single information element that reduces overall overhead
3Productivity
If short control information transmission is enabled, then transmission efficiency is improved, but channel access control complexity increases
Solution Approach 1:
The patent enables dynamic switching between short control information transmission and traditional transmission modes based on the indication information received from the network device, allowing the system to optimize for efficiency when conditions permit while maintaining proper control when needed
Solution Approach 2:
The indication information acts as an intermediary that carries multiple layers of control - it not only indicates whether short control information transmission is enabled but also provides channel access parameter indications, thereby simplifying the control structure by using a single intermediary element rather than multiple separate control mechanisms
Data Source
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AI summary
The present disclosure relates to communication technology, and discloses a wireless communication method and apparatus, a device, and a storage medium. The method includes: obtaining indication information; and determining whether a transmission of a first channel corresponds to a channel access procedure and/or determining a channel access parameter in a channel access procedure corresponding to the transmission of the first channel according to the indication information. With the solutions of the present disclosure, the terminal device can determine whether a channel access procedure is required during an initial access procedure according to the obtained indication information, so as to determine a DCI size or an RAR type to be demodulated during the initial access procedure, or determine whether to perform the channel access procedure during a PRACH or MsgA transmission process, thereby avoiding ambiguity in understanding between the terminal device and the network device, ensuring completion of the initial access, and facilitating improvement of the access success rate and communication reliability. The present disclosure can also ensure the fairness of spectrum sharing when wireless communication is performed on a carrier on the shared spectrum.