Uplink Resource Allocation for LTE-A Scheduling Requests
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Solution Overview
Problem
The conventional contention-based resource allocation in LTE-A networks leads to waste and low utilization of uplink data resources due to conflicts and inefficient scheduling, resulting in reduced transmission success rates.
Innovation Solution
A method where the eNB configures a first shared resource for multiple terminal devices, allocates an SR-RNTI, and upon receiving scheduling requests from multiple devices, allocates a second shared resource or dedicated resource for uplink data transmission, ensuring each device uses its allocated resource and carries its C-RNTI, thereby avoiding conflicts and optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If contention-based resource allocation is used for scheduling requests, then multiple terminal devices can share the same resource, but resource conflicts occur and utilization rate decreases
Solution Approach 1:
The patent segments the resource allocation process into two distinct phases: a contention-based phase for scheduling requests and a dedicated phase for uplink data transmission. When the eNB detects multiple scheduling requests on the same resource, it allocates separate dedicated resources to each terminal device, thereby segmenting the originally conflicting transmissions into independent, conflict-free channels.
Solution Approach 2:
The patent implements dynamic resource allocation where the eNB adjusts resource assignment based on real-time detection of scheduling requests. The system transitions from static contention-based sharing to dynamic dedicated allocation when conflicts are detected, optimizing resource utilization adaptively according to actual network conditions and traffic demands.
2Device complexity
If contention-based resource allocation is used, then resource allocation simplicity is maintained, but resource waste increases due to conflicts
Solution Approach 1:
The patent applies partial dedicated resource allocation only when necessary - specifically when the eNB detects multiple scheduling requests on the same contention resource. The system maintains contention-based allocation for normal operations but switches to dedicated allocation partially, only for the specific terminal devices experiencing conflicts, thereby avoiding unnecessary resource waste while maintaining overall system simplicity.
Solution Approach 2:
The eNB performs self-service by autonomously detecting scheduling request conflicts and automatically allocating dedicated resources to resolve them. This self-managing mechanism eliminates the need for complex terminal device involvement in conflict resolution, maintaining system simplicity while efficiently reducing resource waste through automated eNB actions.
3Reliability
If dedicated resources are allocated to each terminal device, then transmission success rate improves, but resource utilization efficiency decreases
Solution Approach 1:
The patent creates a universal resource allocation framework that serves multiple functions: contention-based resources handle scheduling requests from multiple terminals, while dedicated resources handle uplink data transmission. This multi-functional approach allows the same eNB and resource management system to efficiently handle both resource sharing and conflict-free transmission, optimizing overall resource utilization while ensuring transmission success.
Solution Approach 2:
The eNB performs preliminary detection of scheduling requests on contention-based resources before allocating uplink data resources. By detecting multiple requests in advance and proactively allocating dedicated resources beforehand, the system prevents conflicts before they occur, ensuring high transmission success rates while maintaining efficient resource usage through advance planning rather than reactive conflict resolution.
Data Source
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AI summary
A scheduling request method, network side device, terminal device and system, belong to the field of communications technologies. The method includes: configuring a first shared resource used for a scheduling request (SR), and sending first information to multiple terminal devices to notify of the first shared resource (101); receiving the SR on the first shared resource (102); allocating a second shared resource of uplink data to the multiple terminal devices, or allocating a dedicated resource of uplink data to at least one of the multiple terminal devices (103). The network side device includes: a configuration module, a receiving module and an allocation module. The terminal device includes: a receiving module, a request module and a sending module. The system includes: a network side device and a first terminal device. The present invention avoids the waste of the uplink data resource, and improves a utilization rate of the uplink data resource and a transmission success rate of the uplink data.