LTE Terminal Scheduling Request Resource Allocation
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Solution Overview
Problem
In LTE systems, the inefficient allocation of radio resources leads to interference and wastage, as terminals continuously request radio resources without proper identification, especially when they lack uplink synchronization or dedicated channels, causing unnecessary consumption of radio resources.
Innovation Solution
A method is introduced where terminals determine if they have been allocated an uplink control channel or need to initiate a RACH procedure, monitor the downlink control channel for identifiers, and terminate the scheduling request if an identifier is received, ensuring efficient radio resource allocation and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals continuously request radio resources without proper identification, then terminals can maintain connectivity and request resources, but radio resources are wasted and interference increases
Solution Approach 1:
The terminal performs preliminary identification by monitoring the downlink control channel for its identifier before continuously requesting radio resources. This preliminary check allows the terminal to determine whether it has been allocated resources, preventing unnecessary continuous resource requests and reducing radio resource waste while maintaining connectivity capability
Solution Approach 2:
The system implements a feedback mechanism where the base station sends terminal identifiers over the downlink control channel in response to uplink transmissions. The terminal uses this feedback to determine whether to continue or terminate resource requests, creating a closed-loop control system that prevents unnecessary resource consumption while maintaining reliable connectivity
2Productivity
If terminals monitor downlink control channel for identifiers, then radio resource allocation efficiency improves, but terminal complexity increases
Solution Approach 1:
The terminal uses its existing downlink control channel monitoring capability, originally designed for receiving scheduling information, to also detect its identifier. This multi-functional use of existing hardware and processing resources improves resource allocation efficiency without requiring additional dedicated monitoring components or significantly increasing terminal complexity
3Adaptability or versatility
If terminals initiate RACH procedure without uplink synchronization, then terminals can request radio resources, but radio resource interference increases
Solution Approach 1:
The base station provides feedback by transmitting the terminal's identifier over the downlink control channel after receiving uplink transmissions during or after the RACH procedure. This feedback allows the terminal to verify whether its resource request was successful and to terminate further requests if already allocated, reducing radio interference while maintaining the ability to request resources when needed
Data Source
AI summary
The present invention relates to a wireless communication system providing a wireless communication and a mobile terminal. During data communication between a base station and a terminal in a long term evolution (LTE) system, while the terminal performs a random access channel (RACH) procedure for requesting a radio resource allocation from the base station, if the terminal is allocated with a radio resource using its radio terminal identifier, the terminal is allowed to appropriately select a radio resource, thereby preventing the consumption of radio resources and increasing efficiency.