Relay Wireless Device ProSe Relay Delay Reduction
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Solution Overview
Problem
In wireless communication networks, particularly in ProSe relay scenarios, there is a delay introduced when a relay wireless device requests uplink resources from the network before transmitting data received from a source device to the network, leading to inefficiencies in data transmission.
Innovation Solution
The relay wireless device obtains data transmission information, such as amount and arrival time, from the source device and requests resources from the network based on this information before receiving the data, allowing for optimized resource allocation and reduced delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the relay wireless device requests uplink resources from the network after receiving data from the source device, then the resource allocation is based on actual data arrival, but transmission delay is introduced due to the resource request and allocation process
Solution Approach 1:
The relay wireless device performs preliminary resource allocation by receiving downlink data and determining uplink resource needs before the actual uplink transmission occurs. The network node allocates uplink resources based on the downlink resource assignment information received from the relay device, enabling the relay to transmit uplink data without waiting for a resource request-grant exchange, thus reducing transmission delay
Solution Approach 2:
The relay wireless device provides feedback to the network node by transmitting downlink resource assignment information that indicates the resources used to receive downlink data. This feedback enables the network node to proactively allocate uplink resources, creating a feedback loop that optimizes resource allocation and reduces latency in the uplink transmission process
2Productivity
If the relay wireless device requests resources in advance before receiving data, then transmission delay is reduced, but resource allocation efficiency may decrease due to potential over-allocation
Solution Approach 1:
The relay wireless device determines uplink resource needs based on downlink resource assignment information received from the network node, allowing the network to pre-allocate uplink resources before the relay actually receives or needs to forward the data. This preliminary resource allocation eliminates waiting time for resource grants while the resource amount is precisely determined from the downlink assignment, avoiding both over-allocation and under-allocation
Solution Approach 2:
The system changes the parameter timing of resource allocation by shifting from reactive allocation (after data arrival) to proactive allocation (before data transmission). The network node uses the downlink resource assignment parameters to determine and allocate corresponding uplink resources, creating a synchronized resource allocation mechanism that optimizes both timing and resource utilization
Data Source
AI summary
According to some embodiments, a method in a first wireless device of relaying data from a second wireless device to a wireless communication network comprises: obtaining data transmission information associated with data to be relayed from the second wireless device to the wireless communication network; requesting resources from the wireless communication network according to the data transmission information before receiving the data to be relayed; receiving an indication of resources from the wireless communication network; receiving the data from the second wireless device; and transmitting the data to the wireless communication network using the indicated resources. In particular embodiments, the data transmission information includes at least one of an amount of data to be relayed from the second wireless device to the wireless communication network and an estimated time for receiving the data from the second wireless device at the first wireless device.