Half-Period Time Domain Pattern for V2V Signaling Overhead
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Solution Overview
Problem
Current D2D and V2V communication technologies face challenges in efficiently managing time domain resources, leading to excessive signaling overheads and semi-duplex issues due to inadequate time domain patterns and bit usage, which affects system performance and reliability in vehicle-to-vehicle communication scenarios.
Innovation Solution
The proposed solution defines a time domain pattern with half the length of a period, allowing for a greater number of time domain patterns than D2D but fewer than existing V2V technologies, and uses mirror symmetric patterns to avoid resource conflicts, reducing bit usage and improving system reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a full-period time domain pattern is used to indicate data transmission resources, then the resource indication is complete and accurate, but the signaling overhead increases and bit usage becomes excessive
Solution Approach 1:
The patent divides the full-period time domain pattern into two separate half-period patterns. Each half-period pattern independently indicates data transmission resources for its respective time period. This segmentation reduces the number of bits required for resource indication while maintaining complete resource coverage, as each segment only needs to represent resources for half the total period rather than the entire period.
Solution Approach 2:
Instead of providing a complete time domain pattern for the entire period in a single indication, the patent uses partial patterns for each half-period. Each half-period pattern provides sufficient information for its specific time range without redundancy, achieving complete resource indication through the combination of partial patterns rather than a single excessive full-period pattern.
2Adaptability or versatility
If more time domain patterns are defined to cover all possible resource configurations, then the adaptability increases, but the system complexity and resource management difficulty increase
Solution Approach 1:
The patent segments the time domain resource indication into two independent half-period patterns instead of managing one complex full-period pattern. This segmentation reduces system complexity by breaking down the resource management task into smaller, more manageable units while maintaining the ability to flexibly configure resources across the entire period through combination of the segments.
3Ease of manufacture
If traditional D2D time domain patterns are used for V2V communication, then the implementation is simple, but resource conflicts occur due to semi-duplex issues
Solution Approach 1:
The patent divides the communication period into two half-periods with separate time domain patterns, enabling different UEs to transmit in different time segments. This segmentation allows full-duplex operation where some UEs transmit while others receive during the same overall period, eliminating semi-duplex resource conflicts while keeping each individual pattern simple to implement.
Solution Approach 2:
The patent establishes periodic time domain patterns for half-periods, creating a structured alternating transmission scheme. This periodic structure ensures that resource conflicts are avoided by design, as transmission opportunities are systematically distributed across different time periods while maintaining implementation simplicity through repetitive pattern usage.
Data Source
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AI summary
This application relates to the field of communications technologies, and in particular, to a terminal device, a base station, and a data transmission method. User equipment includes a processor and a transmitter. The processor is configured to determine a time domain resource within a T2 time length based on second time domain resource indication information, where the second time domain resource indication information is used to indicate a time domain resource occupied for data transmission within a T1 time length, and T2 is twice T1; and the processor is further configured to generate second control information, where the second control information includes the second time domain resource indication information. The transmitter is configured to send the second control information; and the transmitter is further configured to send data on the time domain resource that is determined within the T2 time length. In this application, only a time domain pattern with a half time length of a period is defined, so that total time domain patterns in a system are applicable to a vehicle-to-vehicle communication scenario. In addition, time domain resource indication information occupies fewer bits, thereby saving system resources.