Buffer Status Report Segmentation for V2X Resource Allocation
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Solution Overview
Problem
Current buffer status report (BSR) formats in LTE wireless communication systems are inadequate for accurately allocating resources for vehicle-to-everything (V2X) communications, as they do not provide sufficient details for ensuring complete transmission of critical messages like collision warnings in a single communication period.
Innovation Solution
The proposed solution involves vehicle-based user equipment (UE) generating BSRs that specify message sizes, types, and additional parameters such as target range, transmission power, and priority, allowing base stations to allocate resources more effectively for transmitting messages in V2X communications, ensuring complete and timely transmission of messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current LTE BSR formats are used for V2X communications, then device complexity is reduced and ease of operation is maintained, but resource allocation accuracy deteriorates and message transmission reliability worsens
Solution Approach 1:
The BSR is segmented into multiple fields including total buffer size, message size, and number of messages. This segmentation allows the base station to accurately determine resource allocation by analyzing individual message characteristics rather than treating buffer status as a single aggregate value, thereby improving transmission reliability for V2X communications.
Solution Approach 2:
The patent adds new dimensions to the BSR by including not only buffer size but also message size and number of messages. This multi-dimensional information provides the base station with comprehensive insights into the data transmission requirements, enabling more accurate resource allocation and improving message transmission reliability.
2Measurement precision
If detailed message information is included in BSR, then resource allocation accuracy improves, but device complexity and signaling overhead increase
Solution Approach 1:
The UE performs preliminary calculations of total buffer size, message size, and number of messages before generating the BSR. By pre-computing these parameters, the UE simplifies the BSR generation process while providing precise measurement information to the base station, balancing measurement precision with device complexity.
3Reliability
If resource allocation is optimized for complete message transmission, then message transmission reliability improves, but communication period duration increases
Solution Approach 1:
The base station uses the detailed BSR information to pre-determine the exact resource allocation required for complete message transmission. By calculating the precise resource needs beforehand based on message size and number of messages, the system can allocate sufficient resources in a single communication period, ensuring complete transmission without extending the communication period duration.
Data Source
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AI summary
Aspects described herein generally relate to communicating buffer status reports (BSR) in wireless communications. A BSR can be generated at a device indicating a size of each of a plurality of messages stored in a buffer of the device for communicating from the device to one or more other devices. The BSR can be transmitted to a base station to request resources for communicating one or more of the plurality of messages to the one or more other devices.