Uplink Resource Allocation for Cellular and Direct Communications
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently allocating resources for both cellular and direct device-to-device communications, particularly in distinguishing between high-priority direct communications and cellular communications to minimize signal collisions and prioritize urgent transmissions.
Innovation Solution
A method where user equipment requests uplink resources from a network node by transmitting a scheduling request and a status report that indicates whether the data is for cellular or direct communication, allowing the network node to allocate resources appropriately based on the type of communication, using shared resources for both types and prioritizing direct communications when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated resources are provided for direct communications, then priority and reliability of direct communications is improved, but resource utilization efficiency deteriorates due to infrequent usage
Solution Approach 1:
The patent merges the resource allocation mechanisms for cellular and direct communications into a unified framework. The network node handles both communication types through a single scheduling request and status report mechanism, allocating resources from a common pool while maintaining priority differentiation through the communication type indication in the status report.
Solution Approach 2:
The patent applies local quality by differentiating treatment based on communication type. While using the same general resource allocation process for both cellular and direct communications, the system modifies the allocation behavior based on the communication type indication in the status report, ensuring direct communications receive priority when needed.
2Device complexity
If network node allocates resources without knowing communication type, then resource allocation simplicity is improved, but collision risk and priority handling deteriorate
Solution Approach 1:
The patent applies preliminary action by having the user equipment indicate the communication type in the status report before the network node makes the final resource allocation decision. This allows the network node to prepare appropriate allocation strategies in advance based on the indicated communication type.
Solution Approach 2:
The patent implements feedback by incorporating communication type information in the status report that feeds back to the network node. This feedback mechanism enables the network node to adjust its resource allocation behavior based on the actual communication requirements, improving both collision avoidance and priority handling.
3Measurement precision
If status report includes communication type indication, then resource allocation accuracy is improved, but status report size and transmission overhead deteriorate
Solution Approach 1:
The patent applies parameter changes by modifying the status report structure to include a communication type indication parameter. This additional parameter provides the network node with the necessary information to accurately differentiate between cellular and direct communications while maintaining efficient report formatting.
Data Source
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AI summary
The application discusses the allocation of resources to user equipment for uplink cellular and direct device to device communications. A user equipment method of requesting uplink resource from a network node is disclosed. The method comprises: transmitting a scheduling request; generating a status report the status report providing an indication of an amount of the uplink data and whether the uplink data is to be transmitted as a cellular communication to at least one other user equipment transmitted via at least one network node or whether the uplink data is to be transmitted as a direct communication directly to at least one other user equipment; and in response to receiving from the network node a resource grant granting a resource to the user equipment for transmitting the status report, transmitting the status report within the granted resource.