Dynamic Bandwidth Allocation via Directional Polling in Millimeter-Wave Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current access schemes in millimeter-wave wireless communication networks, such as TDMA, suffer from high scheduling latencies and inability to dynamically de-allocate and re-allocate bandwidth based on traffic demands, which is unsuitable for low-latency applications like Internet traffic and Wireless I/O.
Innovation Solution
A directional polling scheme is implemented, where a piconet coordinator dynamically allocates and adjusts channel bandwidth by transmitting poll request and response frames, allowing immediate bandwidth adjustments based on device requirements, using beamforming techniques to ensure efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If TDMA access scheme is used in directional mode, then bandwidth allocation is structured, but scheduling latency becomes very high (at least one superframe worth of latency)
Solution Approach 1:
The patent implements dynamic bandwidth allocation where the piconet coordinator can adjust channel bandwidth in real-time based on traffic demands. The system transitions from static TDMA superframe structures to dynamic allocation using poll request/response frames, allowing immediate bandwidth adjustments without waiting for superframe boundaries. This resolves the contradiction by making the bandwidth allocation system dynamic rather than static, eliminating the inherent superframe latency of TDMA.
Solution Approach 2:
The patent uses poll request frames sent by the piconet coordinator to proactively query devices about their bandwidth needs before allocating resources. This preliminary action allows the system to anticipate and prepare bandwidth allocations in advance, reducing scheduling latency by getting ahead of traffic demands rather than reacting after superframe cycles complete.
2Adaptability or versatility
If TDMA access scheme is used, then channel bandwidth can be allocated in structured time slots, but dynamic de-allocation and reallocation based on traffic demands is not possible
Solution Approach 1:
The patent implements a feedback mechanism where devices respond to poll request frames with information about their current traffic demands and bandwidth requirements. The piconet coordinator uses this feedback to make informed decisions about bandwidth allocation, dynamically adjusting channel bandwidth up or down based on actual network conditions. This feedback loop enables adaptability while maintaining manageable system complexity through structured poll-response interactions.
Solution Approach 2:
Devices in the network self-report their bandwidth requirements by responding to poll requests with traffic demand information. This self-service approach allows the network to automatically adapt to changing conditions without complex centralized control, reducing the complexity burden on the access scheme while achieving high adaptability through distributed device autonomy.
3Speed
If directional antennas are used to increase communication range, then data rate can be increased to Gbps, but the link becomes very sensitive to mobility and orientation changes
Solution Approach 1:
The patent implements periodic poll request transmissions by the piconet coordinator to regularly check device status and bandwidth requirements. This periodic action allows the system to maintain directional high-rate links while periodically verifying link health and adjusting allocations, thereby maintaining both high data rates and link reliability through regular monitoring and adaptation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces latency and enhances bandwidth utilization by allowing real-time dynamic allocation of bandwidth, improving communication efficiency and adaptability to changing traffic demands in millimeter-wave networks.
Implementation Method 1
using beamforming techniques to ensure efficient data transmission
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A wireless communication device, a wireless communication system and a method of transmitting by a piconet controller (PNC) a poll request frame using beamforming techniques to one or more devices, wherein the poll request frame includs a time offset for sending a poll response frame by the device. The PNC receives the poll response frame with a channel bandwidth allocation request and dynamically allocating a channel bandwidth to the one or more devices according to the channel bandwidth allocation request.