Dynamic Bandwidth Reservation in 60 GHz WPAN
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Solution Overview
Problem
Current wireless personal area networks operating in the 60 GHz band face inefficiencies due to high latency and low throughput for bursty data traffic, as well as poor channel utilization, primarily because they rely on traditional Time Division Multiple Access (TDMA) and Carrier Sense Multiple Access (CSMA) mechanisms that do not support parallel transmissions and incur delays.
Innovation Solution
A dynamic bandwidth reservation mechanism is introduced, allowing for the allocation of free channel time blocks for directional transmission, enabling efficient allocation and reuse of bandwidth through a Coordinator that can allocate unreserved time blocks dynamically, reducing latency and increasing throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional TDMA and CSMA mechanisms are used, then network structure is simple and ease of operation is maintained, but latency increases and throughput decreases for bursty data traffic
Solution Approach 1:
The patent implements dynamic bandwidth reservation where the Coordinator can allocate unreserved time blocks in real-time based on current network conditions and traffic demands. This dynamic allocation mechanism allows the system to adapt to bursty data traffic patterns, reducing latency by quickly granting channel access when available, while maintaining manageable complexity through automated coordination protocols.
2Productivity
If traditional TDMA and CSMA mechanisms are used, then device complexity is low, but channel utilization becomes poor and spatial reuse is inefficient
Solution Approach 1:
The patent enables stations to autonomously request and receive bandwidth allocations from the Coordinator based on their own traffic needs. Stations can independently initiate bandwidth requests for unreserved time blocks, and the Coordinator automatically processes these requests and grants allocations. This self-service mechanism improves channel utilization by ensuring that available bandwidth is quickly allocated to stations that need it, without requiring complex centralized control for every allocation decision.
3Productivity
If dynamic bandwidth reservation is implemented, then throughput increases for bursty data traffic, but the mechanism complexity increases
Solution Approach 1:
The patent designs the bandwidth reservation mechanism to serve multiple functions: it handles both reserved and unreserved time block allocations, supports constant bit rate and variable bit rate connections, enables spatial reuse through directional transmissions, and provides quality of service guarantees. This multi-functional approach allows a single reservation mechanism to address various traffic types and network conditions, improving throughput across different scenarios while avoiding the need for separate specialized mechanisms for each function.
4Productivity
If unreserved time blocks are allocated dynamically, then spatial reuse efficiency improves, but coordination overhead increases
Solution Approach 1:
The patent establishes preliminary coordination frameworks where the Coordinator pre-defines unreserved time blocks and allocation rules before actual data transmission occurs. Stations are pre-configured with knowledge of available unreserved blocks and can directly utilize them without real-time negotiation. This preliminary setup reduces coordination overhead during actual data transmission, as the allocation decisions have already been made in advance, while still enabling efficient spatial reuse through pre-planned directional transmission opportunities.
Data Source
AI summary
An embodiment of the present invention provides a method, comprising dynamically reserving free channel time blocks for directional transmissions in a wireless personal area network (WPAN) by a transceiver communicating with a Coordinator and the Coordinator allocating a part or a whole of unreserved channel time blocks for a directional link during a handshake with the transceiver.