Frequency Band Allocation for D2D Cell Overload Prevention
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Solution Overview
Problem
Current device-to-device communication technologies face limitations in efficiently managing frequency band resources, leading to potential cell overload scenarios when all devices in a serving cell perform transmissions and receptions on a single frequency, especially in cases where LTE-D is sparsely deployed across frequency bands.
Innovation Solution
The method involves a wireless device selecting a serving cell for network connection and performing a search for a frequency band on a neighbor cell for device-to-device communications. If the search is successful, it uses resources associated with the neighbor cell's frequency band; if not, it employs pre-configured resources, allowing dynamic switching between different models of operation based on confidence metrics and resource availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If all devices in a serving cell perform transmissions and receptions on a single frequency, then device-to-device communication is simplified, but cell overload occurs
Solution Approach 1:
The patent segments the frequency band resources by dividing devices into different groups (first group and second group) that operate on different frequencies within the same frequency band. This segmentation allows simultaneous D2D communications without all devices competing on a single frequency, thereby preventing cell overload while maintaining operational simplicity through standardized procedures.
Solution Approach 2:
The patent implements dynamic frequency selection where the network can configure different frequency resources for different device groups based on current network conditions and device distribution. This dynamic allocation optimizes resource utilization and prevents overload by adapting to changing traffic patterns and device densities.
2Quantity of substance
If LTE-D is sparsely deployed across frequency bands, then frequency band resources are conserved, but device-to-device communication reliability decreases
Solution Approach 1:
The patent enables a single frequency band to serve multiple D2D communication groups simultaneously by allocating different frequency resources within that band to different groups. This multi-functionality allows sparse deployment of LTE-D across frequency bands while maintaining reliable communication through efficient intra-band resource utilization.
Data Source
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AI summary
A method, an apparatus, and a computer-readable medium for wireless communication are provided. The apparatus selects a serving cell for connection to a network. The apparatus performs a search for a frequency band on a neighbor cell for use in device-to-device communications. The apparatus performs the device-to-device communications using pre-configured resources associated with the frequency band when the search for the frequency band on the neighbor cell fails. The apparatus performs the device-to-device communications using resources associated with the frequency band of the neighbor cell when the search for the frequency band on the neighbor cell is successful.