Sidelink Synchronization Signal Resource Configuration in Carrier Aggregation
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Solution Overview
Problem
Conventional V2X communication systems do not support carrier aggregation, which limits the configuration of transmission resources for synchronization signals, particularly in vehicle-to-everything (V2X) communication, and do not efficiently manage transmission power and reliability requirements.
Innovation Solution
A method and apparatus for transmitting sidelink synchronization signals (SLSS) in a wireless communication system, where SLSS resources are configured equally across multiple carriers, and the network determines which carriers actually transmit the SLSS, aligning D2D frame numbers and optimizing resource usage based on transmission configuration information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If carrier aggregation is used in V2X communication, then communication capacity and reliability are improved, but resource configuration complexity and power management difficulty increase
Solution Approach 1:
The patent segments the V2X communication system into multiple carriers, each independently configured with SLSS resources. This allows the system to maintain multiple communication channels simultaneously, improving reliability through diversity while managing complexity through modular, carrier-specific configuration rather than monolithic system-wide configuration.
Solution Approach 2:
The patent introduces dynamic SLSS transmission configuration information that allows carriers to selectively transmit or receive SLSS based on current communication needs. This dynamic control mechanism enables the system to adapt resource allocation in real-time, maintaining reliability while optimizing resource usage and reducing unnecessary transmissions that would increase complexity.
2Reliability
If SLSS is transmitted on all configured carriers, then synchronization reliability is improved, but transmission power consumption increases
Solution Approach 1:
Instead of transmitting SLSS on all carriers unconditionally, the patent implements partial action by allowing selective transmission based on configuration information. Only carriers that require synchronization or are designated for SLSS transmission will actually transmit the signal, reducing overall power consumption while maintaining synchronization reliability where needed.
Solution Approach 2:
The patent applies local quality by allowing different carriers to have different SLSS transmission characteristics. Each carrier can be individually configured with its own SLSS resource configuration and transmission status, enabling the system to optimize power usage locally on each carrier based on specific communication requirements rather than applying a uniform transmission strategy across all carriers.
3Adaptability or versatility
If SLSS resources are configured in each carrier, then communication flexibility is improved, but system complexity increases
Solution Approach 1:
The patent implements universality by using the same SLSS resource configuration structure across all carriers. Each carrier follows the same configuration pattern and resource allocation rules, which provides flexibility and adaptability for different communication scenarios while reducing system complexity through standardized, repeatable configuration procedures rather than requiring unique configurations for each carrier.
Data Source
AI summary
Provided is a method of transmitting a sidelink synchronization signal in a wireless communication system and a user equipment (UE) using the same. The method includes: receiving SLSS resource configuration information, wherein the SLSS resource configuration information configures SLSS resources of an equal position and number in each of a plurality of carriers in which carrier aggregation is performed, receiving SLSS transmission configuration information indicating whether the plurality of carriers actually transmits the SLSS using the SLSS resources, respectively and transmitting the SLSS using the SLSS resources indicated by the SLSS resource configuration information on at least one of the plurality of carriers determined based on the SLSS transmission configuration information.