Channel Access Parameter Indication in Unlicensed Spectrum
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Solution Overview
Problem
The existing methods for indicating channel access in unlicensed spectrum communication systems result in increased bit overhead and inconsistency in information size between unlicensed and licensed spectra, complicating the design and implementation.
Innovation Solution
A method and apparatus for indicating channel access that receive and transmit first indication information to obtain channel access parameters, allowing for determining channel access for target uplink transmissions without requiring a new command field, thereby reducing bit overhead and design complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channel access parameters are indicated during random access procedure on unlicensed spectrum, then channel access determination is enabled, but bit overhead increases and information size becomes inconsistent with licensed spectrum
Solution Approach 1:
The patent applies universality by making existing command fields in the Random Access Response message serve multiple functions. The fields that originally indicated uplink resource allocations are repurposed to also indicate channel access parameters for unlicensed spectrum transmissions. This allows the same information structure to work for both licensed and unlicensed spectra, enabling channel access determination without increasing bit overhead or creating information size inconsistencies.
2Reliability
If new command fields are added to indicate channel access parameters, then channel access control is improved, but device complexity increases
Solution Approach 1:
The patent avoids adding new command fields by making existing fields multi-functional. The same fields that provide uplink resource allocation information are used to convey channel access parameters. This approach improves channel access control reliability while maintaining design simplicity, as no additional fields or processing logic are required in the terminal device.
Solution Approach 2:
The patent merges the function of indicating uplink resource allocations with the function of indicating channel access parameters into the same command fields. By combining these two indication functions into existing fields, the patent achieves reliable channel access control without increasing device complexity through additional separate fields or structures.
3Adaptability or versatility
If information size on unlicensed spectrum differs from licensed spectrum, then specific channel access control is achieved, but system consistency deteriorates
Solution Approach 1:
The patent maintains system consistency by using the same command fields for both licensed and unlicensed spectrum indications. The existing fields that carry uplink resource allocation information also carry channel access parameters, ensuring that the information structure remains uniform across different spectrum types. This achieves adaptability for unlicensed spectrum control while preserving stability in information size consistency.
Data Source
AI summary
The present disclosure discloses a method and an apparatus for indicating channel access. The method includes: receiving first indication information transmitted by a network device; and obtaining one or more channel access parameters based on the first indication information. The one or more channel access parameters are used for determining channel access for a target uplink transmission. The first indication information transmitted by the network device is received, and the first indication information may be based on a command field in existing information, without the need for a new command field for indicating channel access for the target uplink transmission.