NR Sidelink Resource Synchronization for Low-Latency Link Setup
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Solution Overview
Problem
In sidelink communication scenarios, the reuse of LTE SL and LTE V2X SL technologies in New Radio (NR) results in high communication overheads and latency due to blind searching for sidelink control information, which affects the success rate of service information transmission.
Innovation Solution
A communication method involving user terminals and an access network device to establish sidelinks with acknowledgement messages and synchronized communication resource pools, utilizing licensed frequency bands below 6 GHz for improved connection success and reduced latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If blind searching for sidelink control information is used in NR sidelink communication, then device compatibility with LTE SL and LTE V2X SL is maintained, but communication overhead and latency increase significantly
Solution Approach 1:
The patent introduces an access network device as an intermediary to allocate communication resources for sidelink communication. Instead of devices blindly searching for each other, the access network device mediates the resource allocation process by providing pre-configured resource pools and sending allocation indications to both transmitting and receiving devices, thereby reducing search time and latency while maintaining compatibility with existing LTE sidelink mechanisms
Solution Approach 2:
The patent implements preliminary resource allocation where the access network device pre-configures communication resource pools and provides resource allocation indications before actual sidelink communication occurs. This preliminary action eliminates the need for blind searching during actual communication, as devices already know the allocated resources in advance, significantly reducing communication latency
2Device complexity
If blind searching for sidelink control information is used, then device complexity is reduced, but communication overhead increases
Solution Approach 1:
The patent implements a feedback mechanism where receiving devices send acknowledgement messages to transmitting devices to confirm successful reception of sidelink control information. This feedback loop enables efficient resource utilization by allowing transmitting devices to know whether their transmissions were successful, reducing redundant retransmissions and overall communication overhead while maintaining relatively simple device implementation
3Reliability
If acknowledgement messages are implemented for link establishment, then transmission success rate is improved, but message overhead increases
Solution Approach 1:
The patent implements a self-service mechanism where the acknowledgement message serves dual purposes: it confirms successful link establishment and simultaneously carries resource allocation confirmation information. This self-service approach allows the acknowledgement message to perform multiple functions efficiently, improving transmission reliability while minimizing the increase in message overhead by consolidating multiple information types into a single message structure
Data Source
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AI summary
A communication method and a related product are disclosed. The method includes: sending a first message, where the first message includes a first link configuration parameter, and the first link configuration parameter is used to establish a first link; and receiving a first acknowledgement message sent by a second user terminal, where the first acknowledgement message is used to indicate that the second user terminal completes establishment of the first link to the first user terminal. This application helps to improve a communication speed.