Aggregated Frame Transmission Lifetime Determination
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Solution Overview
Problem
Current wireless network standards, such as IEEE 802.11n and 802.11e, do not specify how frame aggregation mechanisms relate to transmission lifetime values or different access categories, which can lead to inefficiencies and potential frame discards due to timing issues.
Innovation Solution
The solution involves determining the transmission lifetime for aggregated frames based on the newest or most recently received frame's lifetime, allowing for efficient aggregation and transmission of frames within the same destination address or access category, while avoiding frame discards by setting a suitable transmission window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple MAC frames are aggregated into a single aggregated frame, then transmission overhead is reduced and network efficiency is improved, but timing management becomes complex and frames may be discarded due to exceeding lifetime constraints
Solution Approach 1:
The patent applies preliminary action by determining the transmission lifetime of the aggregated frame based on the newest received frame before aggregation occurs. This pre-determination of timing parameters eliminates the need for complex post-aggregation timing calculations and prevents frame discard issues by ensuring the aggregated frame is transmitted within the appropriate lifetime window.
Solution Approach 2:
The patent changes the timing parameter (transmission lifetime) of the aggregated frame to match the newest received frame's lifetime. This parameter adjustment simplifies timing management by providing a clear, deterministic rule for setting the aggregated frame's transmission window, avoiding the complexity of managing multiple different lifetime values.
2Loss of energy
If frames are aggregated to reduce overhead, then transmission efficiency improves, but the risk of frame discard due to lifetime expiration increases
Solution Approach 1:
By determining the transmission lifetime before aggregation based on the newest frame, the patent ensures that the aggregated frame will be transmitted within the appropriate time window. This preliminary timing determination prevents frame discard due to lifetime expiration while still achieving overhead reduction through aggregation.
3Reliability
If different access categories are handled with different contention parameters, then QoS requirements are met, but aggregation of frames from different categories becomes difficult
Solution Approach 1:
The patent applies local quality by determining transmission lifetime based on the newest received frame within the same access category. This allows frames from the same category to be aggregated with appropriate timing parameters, while maintaining the ability to handle different categories with their specific QoS requirements through separate aggregation processes.
Data Source
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AI summary
Various embodiments are disclosed relating to the use of timing or timing-related information for handling aggregated frames in a wireless network. According to an example embodiment, a plurality of frames may be received (402). An aggregated frame may be generated based on the plurality of received frames (404). A transmission lifetime for the aggregated frame may be determined based on a transmission lifetime of one or more of the received frames (406). In another example embodiment, a transmit timer may be determined for the aggregated frame, for example, based on the transmit timer for one or more of the received frames.