Relay Device Predictive Uplink Grant for Sidelink Latency
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE networks, face inefficiencies in sidelink communications due to the sequential decoding and resource allocation processes, leading to increased latency and resource utilization in relay operations between UE and eNB.
Innovation Solution
The introduction of a Predictive Request for Uplink Grant (PRG) message that allows the relay device to anticipate and signal future data requirements to the base station, enabling pre-allocation of resources and reducing latency by decoding the control indication signal from the remote device and sending an uplink grant request before PSSCH message decoding time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the relay device waits for PSSCH message decoding before requesting uplink resources, then resource allocation accuracy is improved, but air interface latency increases
Solution Approach 1:
The relay device performs preliminary action by sending the uplink grant request message to the network device before the PSSCH message decoding is complete. The request is sent based on expected data requirements indicated by the control indication signal, allowing the network to allocate resources in advance rather than waiting for the full decoding process to finish.
2Manufacturing precision
If the relay device requests uplink resources after decoding control indication signal, then resource allocation timing is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The relay device extracts expected data requirements from the control indication signal and sends the uplink grant request message in advance, before the PSSCH decoding completes. This preliminary action allows the network to prepare resource allocation timing accurately while improving overall resource utilization efficiency by avoiding idle waiting periods.
Data Source
AI summary
A method for enabling a wireless communication device to operate in a radio access network as a network relay device to a remote device, using a short range communication channel there between, wherein the communication device receives a control indication signal from the remote device as an indication of future data between the communication device and the remote device via the short range communication channel which forms part of a sidelink communication between the relay device and the remote device; wherein the relay device decodes the control indication signal from the remote device to extract a time allocation for future data.