Dynamic Uplink Grant Allocation in LTE Random Access Response
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Solution Overview
Problem
The existing LTE wireless communication networks have a limited number of uplink grants per random access response (RAR) message due to a constant allocation of control channel elements (CCEs), which restricts the number of uplink grants that can be transferred, especially for devices with varying wireless signal conditions.
Innovation Solution
A method to dynamically adjust the number of uplink grants per RAR message by determining the wireless signal conditions of multiple devices and allocating a corresponding number of control channel elements (CCEs) based on these conditions, allowing more grants to be transferred for better signal quality and fewer for worse signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a constant number of control channel elements (CCEs) are allocated for random access response messages, then the system maintains simplicity in resource allocation, but the number of uplink grants that can be transferred is limited and cannot adapt to varying wireless signal conditions
Solution Approach 1:
The patent implements dynamic allocation of control channel elements (CCEs) for random access response messages based on real-time wireless signal conditions. The base station monitors signal quality metrics and adjusts the number of CCEs allocated to RAR messages accordingly, allowing the system to adapt to varying channel conditions rather than using a fixed allocation scheme.
Solution Approach 2:
The patent changes the parameter of CCE allocation from a constant value to a variable value that depends on wireless signal conditions. By monitoring signal quality metrics and adjusting the number of CCEs allocated to RAR messages, the system optimizes resource utilization and increases the number of uplink grants that can be transferred when signal conditions are favorable.
2Quantity of substance
If more control channel elements (CCEs) are allocated to increase the number of uplink grants, then the capacity for serving multiple devices improves, but the control channel resources consumed increase
Solution Approach 1:
The patent dynamically adjusts the number of CCEs allocated to random access response messages based on current wireless signal conditions and network load. When signal conditions are good and more devices need service, more CCEs are allocated to increase the number of uplink grants. When conditions are poor or load is low, fewer CCEs are used, optimizing resource utilization and reducing unnecessary control channel consumption.
3Productivity
If a fixed number of uplink grants per random access response message is used, then the system operation is simple, but the communication efficiency and capacity utilization are reduced for devices with varying signal conditions
Solution Approach 1:
The patent changes the fixed parameter of uplink grants per random access response message to a variable parameter that adapts to wireless signal conditions. By monitoring signal quality and dynamically adjusting the number of uplink grants included in RAR messages, the system improves communication efficiency and capacity utilization without requiring complex device-side processing.
Data Source
AI summary
Embodiments disclosed herein provide systems and methods for to dynamically adjusting the number of uplink grants per random access response (RAR) message. In a particular embodiment, a method provides, for a Long Term Evolution (LTE) wireless access node having a downlink control channel including a plurality of control channel elements, determining wireless signal conditions for a plurality of wireless devices requesting communication service from the wireless access node. The method further provides allocating a number of the plurality of control channel elements for a random access response message based on the wireless signal conditions. The method further includes transferring a plurality of uplink grants to the plurality of wireless devices in the number of control channel elements.