Logical AP MLD for Relay Resource Management
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Solution Overview
Problem
Current wireless local area network (WLAN) technologies face challenges in efficiently managing resources for relay operations in next-generation Wi-Fi networks, particularly in supporting delay-sensitive applications that require extremely low latency and high throughput.
Innovation Solution
The implementation of a logical AP multi-link device (MLD) comprising an access point (AP) and one or more relay stations (STAs), where the AP operates with an upper medium access control (UMAC) layer and the relay STAs operate with a lower MAC (LMAC) layer, enabling independent channel access and frame exchanges across multiple links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If relay operations are implemented in next-generation Wi-Fi networks, then coverage area and connectivity are improved, but resource management complexity increases
Solution Approach 1:
The patent segments the MAC layer into two independent layers: UMAC (Upper MAC) for control plane operations and LMAC (Lower MAC) for data plane operations. This segmentation allows relay stations to handle data forwarding independently through LMAC while UMAC manages resource allocation and control, thereby improving coverage area without proportionally increasing resource management complexity.
2Productivity
If multiple links are established for multi-link operation, then throughput is increased, but channel access coordination difficulty increases
Solution Approach 1:
The patent introduces an intermediary control mechanism where the UMAC layer acts as a mediator between multiple LMAC layers and the network resource manager. The UMAC receives resource allocations and distributes them to multiple LMAC instances, each handling specific links independently. This intermediary structure enables multi-link operation to achieve increased throughput while simplifying channel access coordination through centralized UMAC management.
3Length of stationary object
If relay stations are introduced to extend network range, then operating range is extended, but latency for delay-sensitive applications increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring LMAC layers at relay stations with dedicated resource allocations from the UMAC before data transmission begins. Resource reservations, buffer allocations, and channel access parameters are established in advance, allowing relay stations to forward data immediately upon receipt without requiring real-time resource negotiation. This preliminary configuration extends operating range through relay stations while minimizing additional latency.
Data Source
AI summary
An access point (AP) station in a wireless network, the AP comprising: a communication interface to communicate with one or more relay stations (STAs); and a processor coupled to the communication interface, the processor configured to: establish a logical AP multi-link device (MLD) comprising the AP and the one or more relay STAs, wherein the logical AP MLD comprises an upper medium access control (UMAC) layer in the AP and a lower MAC (LMAC) layer in the one or more relay STAs; wherein an UMAC operation is performed at the AP and a LMAC operation is performed at the one or more relay STAs.