Multi-Link Peer Communication Setup Under TDLS Address Constraints
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Solution Overview
Problem
Existing technologies lack solutions for multi-link peer-to-peer communication between non-AP MLD STAs or between a non-AP MLD and a legacy STA, particularly in the 6 GHz band, due to regulatory requirements and address mismatch issues during TDLS setup and direct link communication.
Innovation Solution
The proposed solution involves generating request frames with a multi-link (ML) indication to discover peer-to-peer communication capabilities and setup direct links, using enhanced TDLS and ANQP protocols, and incorporating ML elements in response frames to facilitate multi-link peer-to-peer communication between non-AP MLDs and non-MLD STAs, with APs controlling the process to ensure compliance with regulatory requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-link peer-to-peer communication is implemented between non-AP MLD STAs, then communication capability and data throughput are improved, but address mismatch issues and regulatory compliance complexity arise
Solution Approach 1:
The access point (AP) serves as an intermediary that receives discovery request frames from non-AP MLD STAs, performs address matching validation, and forwards the frames to the target STA. This mediator approach resolves the address mismatch issue by centralizing the address management function at the AP, allowing peer-to-peer communication to proceed without direct address conflict between STAs.
Solution Approach 2:
The system implements a feedback mechanism where the AP validates addresses and provides confirmation to STAs about whether peer-to-peer communication is permitted. This feedback loop ensures regulatory compliance by allowing STAs to only establish direct links when the network controller (AP) confirms that address matching requirements are satisfied.
2Adaptability or versatility
If direct links are established between non-AP MLD STAs, then operational flexibility is improved, but regulatory requirement compliance becomes more difficult
Solution Approach 1:
Before establishing direct links between non-AP MLD STAs, the system performs preliminary address matching validation through the AP. The discovery request frame includes address information that the AP checks against regulatory requirements in advance. This preliminary action ensures that only compliant direct links are established, maintaining regulatory reliability while enabling operational flexibility.
3Device complexity
If multi-link setup is performed over one link, then setup complexity is reduced, but communication capability across multiple links is limited
Solution Approach 1:
The multi-link setup process is segmented into two distinct phases: (1) control plane setup phase where the discovery request and response frames are exchanged over a single link to establish basic connectivity and perform address validation, and (2) data plane activation phase where multiple direct links are activated for actual data transmission. This segmentation reduces setup complexity while enabling full multi-link communication capability.
Data Source
AI summary
The present disclosure provides communication apparatuses and methods for multi-link peer-to-peer communication, the communication apparatus being a communication apparatus of a plurality of communication apparatuses affiliated with a first multi-link device (MLD), each of the plurality of communication apparatuses operating in a corresponding link of the first MLD, the communication apparatus comprising: circuitry, which in operation, generates a request frame, the request frame being one of a discovery request frame to discover a peer-to-peer communication capability of another communication apparatus, or a setup request frame to request setup of one or more direct links, the request frame carrying a multi-link (ML) indication identifying that the communication apparatus is affiliated with the first MLD; and a transmitter, which in operation, transmits the request frame in a link.