NAN Device Multi-Channel Data Transmission via Service Discovery
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting data using multiple channels, particularly in Neighbor Awareness Networking (NAN) devices, where channel availability and utilization are not effectively managed, leading to potential data transmission failures and inefficient power management.
Innovation Solution
A method involving a NAN device that exchanges a service discovery frame with a second NAN device using a common channel, switches to a first channel during a specified period, checks its availability, and transmits data if the channel is clear, utilizing additional fields in the service discovery frame to convey information on channel switching and availability periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If NAN devices use a common channel for service discovery and data transmission, then device compatibility and simplicity are improved, but channel congestion and transmission reliability deteriorate
Solution Approach 1:
The patent segments channel usage into two distinct phases: service discovery phase using a common channel, and data transmission phase using dedicated data channels. This segmentation allows devices to benefit from the simplicity of common channel for discovery while ensuring reliable data transmission through dedicated channels with better signal quality and less congestion.
Solution Approach 2:
The patent performs service discovery and channel negotiation in advance before actual data transmission. Devices exchange capability information and establish data channel assignments during the service discovery phase, so that when data transmission begins, reliable channels are already predetermined, avoiding the need to search for available channels during active transmission.
2Reliability
If NAN devices continuously monitor channel availability, then data transmission reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic channel availability checks instead of continuous monitoring. Devices monitor channels at predetermined intervals and switch between active monitoring and sleep modes periodically, ensuring reliable detection of channel status while significantly reducing power consumption compared to continuous monitoring.
Solution Approach 2:
The patent enables devices to autonomously determine channel availability and make transmission decisions based on pre-established criteria and exchanged capability information. Devices self-manage their monitoring schedules and transmission timing without requiring continuous network coordination, reducing overall system power consumption while maintaining reliability.
3Productivity
If NAN devices switch channels for data transmission, then transmission efficiency and interference avoidance are improved, but device complexity and synchronization difficulty increase
Solution Approach 1:
The patent establishes universal channel switching rules and protocols that all NAN devices in the network must follow. By defining standardized procedures for channel selection, switching timing, and synchronization, the system enables efficient multi-channel transmission while keeping individual device complexity manageable through adherence to common rules rather than requiring complex device-specific logic.
Data Source
AI summary
One embodiment of the present specification may provide a method for transmitting data by a first NAN device in a wireless communication system. Here, the method for transmitting data by the first NAN device may comprise the steps of: exchanging a service discovery frame (SDF) with a second NAN device using a common channel; switching the first NAN device to a first channel during a first interval; checking whether the switched first channel is available during a second interval; and if the first channel is available, transmitting data to the second NAN device via the first channel. Here, information on the first interval and the second interval with respect to the first channel may be included in the service discovery frame.