eNB Resource Allocation for Mode 3 and Mode 4 UE Collision Avoidance
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Solution Overview
Problem
In vehicle communication systems, the allocation of transmission resources between UEs in mode 3 and mode 4 can lead to resource collisions due to the eNB's lack of knowledge about occupied resources in mode 4, resulting in unstable communication and inefficient resource utilization.
Innovation Solution
The eNB determines available resources in a shared transmission resource pool by receiving resource state information from UEs in both modes and allocates resources accordingly to avoid collisions, ensuring that transmission resources occupied by UEs in mode 4 are not allocated to UEs in mode 3.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the eNB allocates transmission resources for mode 3 UEs from a shared resource pool without knowing mode 4 UE resource usage, then resource utilization improves, but resource collisions occur between mode 3 and mode 4 UEs
Solution Approach 1:
The patent implements a feedback mechanism where mode 4 UEs report their selected transmission resource information to the eNB. This feedback enables the eNB to accurately identify which resources are occupied by mode 4 UEs and exclude them from the available resource pool when allocating resources to mode 3 UEs, thereby preventing collisions while maintaining high resource utilization
Solution Approach 2:
The patent requires mode 4 UEs to pre-select their transmission resources from the shared pool before mode 3 resource allocation occurs. By performing this selection in advance and reporting it to the eNB, the system ensures that mode 3 UEs are allocated only from truly available resources, eliminating the possibility of resource collisions
2Reliability
If separate transmission resource pools are used for mode 3 and mode 4 UEs, then resource collisions are avoided, but resource utilization efficiency decreases
Solution Approach 1:
The patent merges the transmission resource pools for mode 3 and mode 4 UEs into a single shared resource pool, allowing both modes to access the same resources. Combined with the feedback mechanism from mode 4 UEs, this merging enables the eNB to intelligently manage resource allocation and prevent collisions, thereby achieving both high resource utilization and communication reliability
Solution Approach 2:
The shared transmission resource pool serves multiple functions: it is used by both mode 3 and mode 4 UEs for transmission, and simultaneously acts as a basis for the eNB to perform coordinated resource management. This multi-functionality maximizes resource utilization while the eNB's control ensures collision-free operation
3Productivity
If the eNB adjusts transmission resource pools to improve utilization, then resource efficiency improves, but communication stability deteriorates due to interruptions
Solution Approach 1:
The patent performs resource allocation in a predetermined sequence: first mode 4 UEs select and report their resources, then the eNB allocates resources to mode 3 UEs based on this information. This preliminary action by mode 4 UEs provides the eNB with accurate resource availability information, enabling stable and interruption-free resource management
Data Source
AI summary
The present invention discloses a resource allocation method and apparatus for resolving a technical issue of a conflict of transmission resources used by user equipment adopting mode 3 and user equipment adopting mode 4. The method comprises: a base station determining whether a shared transmission resource pool shared by first-mode user equipment and second-mode user equipment includes available resources, wherein a transmission resource of the first-mode user equipment is allocated by the base station, and a transmission resource of the second-mode user equipment is selected from the shared transmission resource pool; and if the base station determines that the shared transmission resource pool includes available resources, the base station allocating, on the basis of the available resources, a transmission resource to the first-mode user equipment.