Wireless LAN P2P Data Scheduling With r-TWT for Low-Latency Traffic
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless LAN systems face challenges in providing a method and device for transmitting and receiving data based on a peer-to-peer (P2P) method within a low-latency traffic transmission time, particularly for delay-sensitive traffic.
Innovation Solution
A method and device that utilize a restricted-target wake time (r-TWT) to allocate specific time periods for P2P data communication, allowing stations to communicate within a wireless LAN system during a designated service period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional wireless LAN methods are used for P2P data communication, then the system can maintain basic connectivity, but the transmission time for delay-sensitive traffic becomes uncontrolled and latency increases
Solution Approach 1:
The patent applies preliminary action by establishing a restricted-target wake time (r-TWT) schedule in advance before actual data transmission occurs. The first station requests and the access point allocates a specific future time window for P2P communication, ensuring that delay-sensitive traffic can be transmitted at the optimal time without waiting for channel availability during critical moments.
Solution Approach 2:
The patent implements dynamics by creating a flexible time allocation mechanism where the r-TWT service period can be dynamically adjusted based on traffic characteristics. The system adapts the timing parameters to accommodate varying delay-sensitive traffic patterns while maintaining guaranteed low-latency transmission windows.
2Loss of time
If no time allocation mechanism is used for P2P communication, then the system structure remains simple, but delay-sensitive traffic cannot be transmitted within controlled time limits
Solution Approach 1:
The patent applies segmentation by dividing the communication time into distinct segments: a setup phase for requesting and allocating r-TWT parameters, and a dedicated transmission phase within the r-TWT service period. This temporal segmentation allows simple frame-based communication during the allocation phase and focused data transmission during the service period, managing complexity through structured time division.
3Productivity
If the access point responds to P2P communication requests with allocated time, then low-latency transmission is enabled, but the protocol complexity increases
Solution Approach 1:
The patent merges the time allocation function with existing frame structures by incorporating the r-TWT allocation mechanism into standard access point-to-station frame exchanges. The access point uses existing frame formats to convey allocation decisions, combining multiple functions (acknowledgment, timing information, and allocation control) into unified frame structures to minimize additional protocol complexity.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A method and a device for operating in a wireless LAN system are disclosed. The method performed by a first STA in a wireless LAN system according to one embodiment of the present disclosure comprises the operations of: transmitting, to an access point (AP), a first frame including a first field for requesting peer-to-peer (P2P) data communication within a restricted-target wake time (r-TWT); receiving, from the AP, a second frame including first information related to a time for P2P data communication; and performing the P2P data communication with a second STA for a time allocated by means of the first information, wherein the time allocated by means of the first information may be within an r-TWT service period (SP).