Multi-User Direct Link Transmission Resource Allocation
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Solution Overview
Problem
The 802.11ax standard for wireless communication networks is not adapted to handle bandwidth-demanding services like video-based applications, leading to increased latency and collisions due to competition between Single User (SU) and Multi-User (MU) schemes for access to the wireless medium in high-density environments.
Innovation Solution
The solution involves distributing the management of peer-to-peer communications between an access point (AP) and a peer station, where the source station takes responsibility for a shared bandwidth resource unit allocated by the AP, allowing for efficient time-multiplexed direct link communications with a peer station, preventing medium preemption by other stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If all communications go through the AP in MU scheme, then resource allocation and scheduling are improved, but air time is doubled and medium access time increases
Solution Approach 1:
The patent segments the communication path by introducing direct peer-to-peer links between stations while maintaining AP-controlled resource allocation. This divides the traditional two-hop (source-AP-destination) path into a direct one-hop path for data transmission, reducing air time while preserving centralized scheduling benefits.
Solution Approach 2:
The AP acts as an intermediary that allocates resources and coordinates transmissions without being the actual data transmission path. The AP schedules direct links between stations, serving as a control intermediary rather than a data relay, thus reducing air time while maintaining resource management efficiency.
2Adaptability or versatility
If SU and MU schemes compete for medium access, then flexibility and adaptability are improved, but collisions increase and latency increases
Solution Approach 1:
The patent merges SU and MU schemes into a unified framework where the AP schedules both direct link transmissions (SU-like) and multi-user transmissions (MU-like) using a single resource allocation mechanism. This eliminates competition between separate access schemes, reducing collisions while maintaining flexibility.
Solution Approach 2:
The resource allocation mechanism is designed to be universal, handling both direct peer-to-peer communications and traditional AP-mediated communications through the same scheduling framework. This multi-functional approach allows the system to adapt to different communication patterns without increasing collision probability.
3Speed
If direct link communications are allowed without AP control, then medium access speed is improved, but medium preemption by other stations occurs
Solution Approach 1:
The AP performs preliminary actions by allocating time resources and setting NAV (Network Allocation Vector) values before direct link transmissions begin. This预先 control prevents other stations from preempting the medium during scheduled direct communications, ensuring reliable access while maintaining fast transmission speeds.
Solution Approach 2:
The system uses feedback mechanisms where the AP monitors medium usage and adjusts resource allocations accordingly. The NAV values and scheduling decisions are based on feedback about current medium conditions, ensuring that direct link transmissions are protected from preemption while maintaining efficient medium utilization.
Data Source
AI summary
Aspects of the present disclosure generally relate to multi-user (MU) Peer to Peer (P2P) protocols in wireless networks. A first station (STA) may receiving, from an access point (AP), an allocation of a resource unit (RU) for a peer to peer (P2P) communication; transmit, to a peer second STA, a first frame over a first part of the allocated P2P RU; and receive a second frame transmitted by the second STA over a second part of the P2P RU allocated to the first STA by the AP.