Dynamic Control Channel Allocation for V2X Reliability
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Solution Overview
Problem
Current vehicle-to-everything (V2X) communication systems face challenges in ensuring reliable and low-latency data transmission, particularly in scenarios involving self-driving cars, where sensor data needs to be shared efficiently between vehicles, leading to issues with control channel design and resource allocation.
Innovation Solution
The method involves dynamically determining the allocation of resource blocks (RBs) for control information in the control channel to match the frequency width of the data channel, allowing for efficient transmission of control information to indicate the location of the data channel, and potentially repeating the control channel in both the frequency and time domains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control channel uses a fixed allocation of resource blocks, then the device complexity is reduced, but the reliability of data transmission deteriorates due to mismatches between control channel and data channel frequency widths
Solution Approach 1:
The patent implements dynamic control channel allocation where the frequency width of the control channel is adjusted to match the frequency width of the data channel. The control channel allocation is no longer fixed but dynamically determined based on the actual data transmission requirements, resolving the contradiction between reliability and complexity by making the system adaptive rather than static
Solution Approach 2:
The patent changes the parameter of control channel frequency width from a fixed value to a variable that adapts to data channel characteristics. By dynamically adjusting this parameter based on resource block allocation, the system achieves better reliability without requiring complex additional infrastructure
2Productivity
If the control channel frequency width does not match the data channel frequency width, then the resource usage is simplified, but transients occur and transmission performance deteriorates
Solution Approach 1:
The patent applies local quality by ensuring the control channel allocation specifically matches the local frequency characteristics of the data channel. Rather than using a uniform fixed allocation across all scenarios, the control channel is locally adapted to the specific data transmission requirements, eliminating transients and improving performance
3Reliability
If the control channel is not repeated in frequency and time domains, then the resource usage is optimized, but the reliability of control information transmission is reduced
Solution Approach 1:
The patent applies partial action by repeating the control channel selectively in frequency and time domains only where necessary to ensure reliable delivery of control information. Rather than always using maximum redundancy, the system applies repetition partially based on channel conditions and requirements, achieving reliability while optimizing resource block usage
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A transmitting device may identify resource blocks (RBs) used to transmit data in a data transmission. The transmitting device may determine a frequency width of a data channel in a frequency domain that is used to transmit the data based at least in part on the identified RBs. The transmitting device may dynamically determine an allocation of RBs used to transmit control information in a control channel. The allocation of RBs may be based on the frequency width of the data channel and may cause a frequency width of the control channel to match the frequency width of the data channel in the frequency domain. The transmitting device may transmit the control information in the control channel to indicate a location of the data channel.