Contention-Based Uplink Grant Storage for LTE Delay Reduction
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Solution Overview
Problem
Current uplink transmission methods in LTE networks experience delays due to the need for dedicated resource allocation, which can be mitigated by implementing a contention-based uplink channel that allows multiple user equipment (UEs) to share resources, reducing wait times for resource grants.
Innovation Solution
A method and system that utilize a receiving unit to store contention-based grant data from downlink packets, enabling a transmitting unit to send uplink packets based on this data, potentially using persistent or activated grant allocations to minimize transmission delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated uplink resources are allocated to each UE, then reliability of uplink transmission is improved, but transmission delay increases due to scheduling request and resource grant exchange
Solution Approach 1:
The base station pre-allocates contention-based uplink resources to multiple UEs before they need to transmit data. This preliminary resource assignment eliminates the need for scheduling requests and resource grant exchanges at transmission time, thereby reducing transmission delay while maintaining reliable uplink communication through pre-configured resource guarantees
2Loss of time
If contention-based uplink channel is implemented, then transmission delay is reduced by eliminating SR and resource grant exchange, but resource allocation complexity increases
Solution Approach 1:
The contention-based uplink resources are segmented into separate resource pools for different UEs, with each UE assigned specific time-frequency resources. This segmentation simplifies the resource allocation process by providing clear, predefined resource assignments rather than requiring complex dynamic scheduling decisions, thereby reducing resource allocation complexity while maintaining low transmission delay
3Productivity
If multiple UEs share uplink resources in contention-based channel, then resource utilization efficiency is improved, but probability of resource conflict increases
Solution Approach 1:
The base station performs preliminary resource allocation by assigning specific contention-based uplink resources to multiple UEs in advance. This pre-assignment reduces resource conflicts by coordinating resource usage before transmission occurs, allowing multiple UEs to share resources efficiently while minimizing collision probability through structured resource distribution
Data Source
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AI summary
A method, a mobile system, and a user communication device are disclosed. A receiving unit may receive a downlink packet from a base station. A configuration data storage may store contention based grant data upon receiving the downlink packet and prior to an uplink packet 810 becoming available. A transmitting unit may send an uplink packet based on the contention based grant data.