Centralized Multi-Hop Communication Configuration for Reduced Forwarding Delay
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Solution Overview
Problem
The existing method of configuring transmission resources in multi-hop wireless communication using a higher layer protocol stack leads to increased forwarding delays, which is not conducive to low-delay service transmission.
Innovation Solution
A centralized configuration indication method is employed to schedule multi-hop transmission parameters, reducing the need for higher layer protocol processing in relay apparatuses, thereby minimizing forwarding delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If transmission resources are configured separately by each sending apparatus using higher layer protocol stack in multi-hop transmission, then resource configuration flexibility is improved, but forwarding delay increases
Solution Approach 1:
The scheduling apparatus performs preliminary configuration of transmission resources for multiple hops in advance. The first control information includes configuration information for current hop transmission and subsequent hop transmissions, allowing relay apparatuses to prepare forwarding parameters beforehand without waiting for separate configuration signals during data transmission.
Solution Approach 2:
A centralized scheduling apparatus is introduced as an intermediary to manage resource configuration for multi-hop transmission. This scheduling apparatus generates first control information that includes configuration for multiple hops and transmits it to relay apparatuses, eliminating the need for each sending apparatus to separately configure resources through higher layer protocols.
2Reliability
If each relay apparatus processes data through higher layer protocol stack (MAC layer, RLC layer, PDCP layer), then data processing completeness is improved, but forwarding delay increases
Solution Approach 1:
The patent extracts the resource configuration function from the higher layer protocol stack processing. Instead of having relay apparatuses configure resources through MAC layer, RLC layer, or PDCP layer processing, the scheduling apparatus provides configuration information directly in the first control information, allowing relay apparatuses to forward data more quickly without complete protocol stack processing.
3Loss of time
If centralized scheduling is used to configure multi-hop transmission parameters, then forwarding delay is reduced, but control information complexity increases
Solution Approach 1:
The first control information is segmented into multiple fields: first information for current hop transmission configuration, second information for subsequent hop transmission configuration, and third information for target apparatus reception configuration. This segmentation allows the centralized scheduler to provide comprehensive control information while maintaining an organized structure that relay apparatuses can process systematically.
Data Source
AI summary
A configuration indication method and a communication apparatus. The method includes: obtaining first control information, which indicates a configuration of M-hop data transmission between a first apparatus and a target apparatus, the M-hop data transmission including transmission between the first apparatus and a second apparatus is used to transmit first data, the first control information includes first information, second information, and third information, the first information indicates a configuration used to transmit the first data between the first apparatus and the second apparatus, the second information indicates a configuration of (M−1)-hop transmission, which is not the transmission between the first apparatus and the second apparatus in the M-hop transmission, the third information indicates a configuration required by the target apparatus to receive the first data, and M is an integer greater than 1; and sending the first control information to the second apparatus.