Receiving Device SA Miss Handling in V2X
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Solution Overview
Problem
Current D2D communication systems in wireless networks face performance issues due to the need for detecting scheduling assignments (SA) packets, which can lead to retransmissions and failed communications when SA packets are missed, especially in V2X applications with stringent latency requirements.
Innovation Solution
A receiving device method that assumes data transmission on previously used radio resources when an SA packet is missed, allowing for correct data decoding and avoiding erroneous radio resource allocation, even if the SA packet is not received from transmitting devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the receiving device requires detection of scheduling assignment packets for every data transmission, then the accuracy of radio resource allocation is improved, but the reliability of communication deteriorates when SA packets are missed
Solution Approach 1:
The receiving device stores information about radio resources previously used by the transmitting device before SA packet detection is attempted. When an SA packet is missed, this pre-stored information enables the receiver to correctly identify and decode data on the previously used resources, preventing communication failure.
Solution Approach 2:
The receiving device creates a copy or record of the previously used radio resource information and uses this copied information as a fallback when SA packet detection fails. This allows the system to recover from detection errors without requiring retransmission.
2Manufacturing precision
If the receiving device performs strict SA packet detection, then the correctness of data decoding is improved, but the latency increases due to retransmissions when SA packets are missed
Solution Approach 1:
The receiving device prepares and stores information about previously used radio resources in advance. When data transmission occurs, if the SA packet is missed, the receiver can immediately use the pre-stored information to decode the data correctly, avoiding retransmission delays and reducing latency.
3Reliability
If the receiving device uses information about previously used radio resources to communicate, then the robustness of V2X communication is improved, but the device complexity increases
Solution Approach 1:
The receiving device uses its own stored information about previously used radio resources to resolve detection failures. The device serves itself by maintaining this information and applying it autonomously when SA packet detection fails, without requiring external assistance or complex coordination protocols.
Data Source
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AI summary
Embodiments herein relate to a receiving device (1 1) and a method performed by the receiving device (1 1) performed by a receiving device (1 1) for communicating in a wireless communication network (1). The receiving device 1 1 attempts to detect a scheduling assignment from a transmitting device (10) based on information regarding one or more radio resources previously used by the transmitting device (10) for transmitting data to the receiving device (1 1) within the wireless communication network (1). When not detecting the scheduling assignment from the transmitting device (10), the receiving device (1 1) assumes that a transmission of data from the transmitting device (10) is scheduled on the one or more radio resources previously used by the transmitting device (10). The receiving device communicates within the wireless communication network (1) based on the assumption.