5G Fronthaul Uplink Packet Segmentation for Lower Combining Delay
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Solution Overview
Problem
The increased demand for wireless data traffic in 5G communication systems, particularly in higher frequency bands, leads to challenges in reducing propagation loss and increasing transmission distance, necessitating improved fronthaul transmission methods to manage the increased bandwidth and reduce installation costs.
Innovation Solution
The method involves fragmenting uplink data into multiple packets and determining a transmission order to reduce time delays and increase time margins in the fronthaul structure, utilizing a multi-level connection between a Distributed Unit (DU) and Radio Units (RUs) through a fronthaul interface, with configuration information indicating the number of per-packet Physical Resource Blocks (PRBs).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If uplink data is transmitted as a single large packet, then transmission capacity is maintained, but time delay in uplink combining increases
Solution Approach 1:
The patent divides uplink data into multiple smaller packets instead of transmitting as a single large packet. Each packet is assigned a specific number of Physical Resource Blocks (PRBs) and transmitted in a determined sequence. This segmentation reduces the time delay in uplink combining at the Distributed Unit (DU) while maintaining overall transmission capacity through parallel processing of multiple packets.
2Adaptability or versatility
If multi-level connection is implemented in fronthaul structure, then system flexibility and scalability are improved, but time margin is reduced
Solution Approach 1:
The patent determines the transmission order of packets in advance before actual transmission. The DU receives configuration information indicating the number of PRBs for each packet and pre-determines their transmission sequence. This preliminary action ensures that even with multi-level fronthaul connections, sufficient time margin is maintained by avoiding last-minute scheduling decisions and buffer management delays.
3Ease of manufacture
If function split is applied to base station, then installation cost is reduced, but fronthaul transmission complexity increases
Solution Approach 1:
The patent manages fronthaul transmission complexity by changing and optimizing key parameters such as the number of Physical Resource Blocks (PRBs) allocated to each packet. The DU receives configuration information specifying PRB counts for different packets and adjusts transmission parameters accordingly. This parameter-based management simplifies the fronthaul interface while maintaining the benefits of function split architecture.
Data Source
AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). According to various embodiments, a method performed by a Distributed Unit (DU) may include: generating configuration information for packets used in uplink data transmission of a plurality of Radio Units (RUs) providing a shared cell, and transmitting the configuration information for packets to an RU among the plurality of RUs through a fronthaul interface. The configuration information for packets may include information for indicating the number of per-packet Physical Resource Blocks (PRBs) for the uplink packets.