Sidelink Transmission Pattern Indication for WWAN Resource Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication devices with both WWAN and C-V2X capabilities, the competition for limited resources such as time-frequency resources and transmission power leads to degradation in one or both networks, particularly as demand for C-V2X communication increases.
Innovation Solution
A method and apparatus that indicate a sidelink transmission pattern to a WWAN, allowing for the allocation of uplink transmission grants based on this pattern, enabling efficient resource management and prioritization of sidelink transmissions to avoid conflicts with WWAN transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If resources are shared between WWAN and C-V2X transmissions, then both networks can utilize available capacity, but resource allocation conflicts and degradation occur in one or both networks
Solution Approach 1:
The patent segments the transmission resources by identifying specific subframes designated for sidelink transmissions. The network device divides the time-frequency resources into sidelink-specific portions and WWAN portions, allowing independent management and allocation. This segmentation prevents resource allocation conflicts by ensuring that WWAN uplink grants are not assigned in subframes dedicated to sidelink communications.
Solution Approach 2:
The patent implements preliminary action by having the user equipment indicate its sidelink transmission pattern to the network device before WWAN uplink grant allocation. The network device receives this indication and proactively adjusts its resource allocation strategy, avoiding assignment of WWAN resources in subframes where sidelink transmissions are expected. This preemptive approach prevents conflicts before they occur.
2Productivity
If C-V2X demand increases to meet growing communication needs, then C-V2X service capacity improves, but competition for limited resources intensifies and degrades overall network performance
Solution Approach 1:
The patent applies local quality by providing differentiated resource allocation based on local transmission requirements. Different subframes are designated with different qualities - some subframes are optimized for sidelink transmissions while others are optimized for WWAN transmissions. This allows the system to meet growing C-V2X demand without forcing all resources into a single pool, thereby maintaining transmission power efficiency and avoiding degradation of overall network performance.
3Productivity
If uplink transmission grants are allocated without considering sidelink patterns, then WWAN resource utilization is maximized, but resource allocation conflicts arise with sidelink transmissions
Solution Approach 1:
The patent implements feedback by having user equipment transmit sidelink transmission pattern indications to the network device. This feedback loop provides the network with real information about when sidelink transmissions will occur, enabling the network to adjust its uplink grant allocation accordingly. The network device uses this feedback to avoid allocating WWAN resources in subframes where sidelink transmissions are scheduled, thereby preventing resource allocation conflicts while maintaining high WWAN resource utilization.
Data Source
AI summary
Aspects of the disclosure relate to mechanisms for a user equipment for indicating resources having limited wireless wide area network (WWAN) transmission capability. In some examples, a user equipment indicates a sidelink transmission pattern to a WWAN, receives one or more uplink transmission grants for the WWAN based on at least the sidelink transmission pattern, and transmits at least one of first data to a second user equipment on a sidelink channel based on the sidelink transmission pattern or second data to the WWAN based on the one or more uplink transmission grants. In some examples, the user equipment transmits a sidelink transmission configuration to the WWAN, the sidelink transmission configuration including one or more sidelink transmission patterns. In some examples, the user equipment selects a sidelink transmission pattern from among the one or more sidelink transmission patterns based on expected sidelink transmissions.