Discard Timer Configuration for Wireless Backhaul Latency
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Solution Overview
Problem
In heterogeneous wireless networks, configuring the discard timer in small cell wireless access network nodes to manage user plane data effectively is challenging due to latency in backhaul links, leading to incorrect discarding of data units.
Innovation Solution
Implementing specific identifiers and mechanisms to configure the small cell discard timer based on buffering delays and backhaul delays, ensuring accurate tracking of data delivery times across multiple network nodes, and providing discard timers in both macro and small cell eNBs to manage concurrent connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the discard timer is configured in small cell wireless access network nodes to manage user plane data, then data management capability is improved, but latency in backhaul links causes incorrect discarding of data units
Solution Approach 1:
The macro eNB calculates the buffering delay in advance and communicates it to the small cell eNB before data units are discarded. This preliminary action allows the small cell eNB to configure the discard timer accurately, compensating for backhaul link latency and preventing incorrect discarding of data units.
2Adaptability or versatility
If discard timers are provided in both macro and small cell eNBs to manage concurrent connections, then connection management capability is improved, but system complexity increases
Solution Approach 1:
The macro eNB acts as an intermediary that calculates the buffering delay and communicates it to the small cell eNB. This intermediary role simplifies the overall system by centralizing the complex calculation logic in the macro eNB while enabling the small cell eNB to effectively manage concurrent connections with properly configured discard timers.
Data Source
AI summary
A first wireless access network node receives, from a second wireless access network node, delay information relating to a delay in buffering data at a protocol layer in the second wireless access network node. The first wireless access network node configures a discard timer based on the received delay information for a packet to be sent to a user equipment.