V2X MAC Signaling Frequency Parameter in Buffer Status Report
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in LTE-based Vehicle-to-Everything (V2X) protocols, the wireless communication network lacks information about the suitability of different carriers for V2X services, leading to inefficient resource allocation during network-assisted dynamic scheduling.
Innovation Solution
A method and apparatus where a user equipment (UE) transmits a buffer status report message to a scheduling entity, including a frequency parameter indicating the available frequencies for data transmission, allowing the scheduling entity to allocate appropriate resources based on the provided information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the network uses traditional MAC signaling for resource allocation, then the signaling structure remains simple and standardized, but the network cannot obtain information about carrier suitability for V2X services, leading to inefficient resource allocation
Solution Approach 1:
The frequency parameter is nested within the existing destination index field of the BSR message. The destination index field, which traditionally identifies logical channel groups, now carries an additional layer of meaning by encoding frequency/carrier information. This allows the network to obtain carrier suitability information without adding a separate signaling structure, effectively hiding the new information within the existing signaling framework.
Solution Approach 2:
The patent changes the interpretation and usage of the destination index field parameter in the BSR message. Instead of using it solely for identifying logical channel groups, the field is repurposed to indicate frequency parameters that reflect carrier suitability for V2X services. This parameter transformation allows the same signaling message to convey additional critical information about which carriers are appropriate for V2X transmission.
2Productivity
If the network allocates resources without frequency information, then the resource allocation process remains simple and fast, but resource allocation efficiency deteriorates due to inability to match data with appropriate carriers
Solution Approach 1:
The frequency parameter information is provided to the network in advance through the BSR message before the actual resource allocation decision is made. By including carrier suitability information in the buffer status report, the network can pre-evaluate which carriers are appropriate for the pending data, enabling more efficient resource allocation without adding significant processing time during the actual scheduling moment.
3Reliability
If multiple carriers are used for V2X transmission, then the system capacity and reliability improve, but the complexity of managing and allocating resources across carriers increases
Solution Approach 1:
The patent enables the network to identify and allocate specific carriers based on their local suitability for different V2X services. Each carrier can be evaluated independently for its appropriateness for specific types of V2X data (e.g., safety-critical vs. non-critical traffic), allowing the network to match data characteristics with appropriate carrier properties. This localized evaluation simplifies multi-carrier management by making allocation decisions based on specific carrier qualities rather than treating all carriers uniformly.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Aspects of the disclosure relate to a method of operating a scheduled entity for wireless communication with a network. In some aspects, the scheduled entity obtains data that is to be transmitted, wherein one or more frequencies are available for transmission of the data. The scheduled entity transmits, to a scheduling entity, a message that includes an amount of the data to be transmitted and a frequency parameter indicating at least one of the one or more frequencies to be used for the transmission of the data. The scheduled entity obtains, from the scheduling entity, a resource grant based on the message and transmits the data based on the resource grant. Other aspects, embodiments, and features are also claimed and described.