Bi-directional Channel Time Block Allocation in Wireless Networks
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Solution Overview
Problem
Existing channel allocation methods in wireless networks face challenges in ensuring timely transmission and reception of data packets within specific time limits, particularly in scenarios where traditional methods may not guarantee channel resources under time-constrained conditions.
Innovation Solution
A method for transmitting data packets in wireless networks that involves requesting and allocating bi-directional channel time blocks for both transmission and response, with these blocks predetermined to be in unreserved regions of a superframe, allowing for contention-based usage if not allocated, and considering Round Trip Time (RTT) for efficient allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional channel allocation methods are used, then channel resources can be allocated for data transmission, but time limits for message transmission and reception cannot be guaranteed
Solution Approach 1:
The patent applies preliminary action by pre-allocating bi-directional channel time blocks in unreserved regions before actual data transmission occurs. The coordinator reserves these time blocks in advance based on RTT calculations, ensuring that when data needs to be transmitted, the channel resources are already prepared and assigned, eliminating delays associated with real-time channel allocation and guaranteeing meeting time limits.
2Reliability
If bi-directional channel time blocks are allocated in unreserved regions, then time limits are satisfied, but channel resource utilization may be reduced
Solution Approach 1:
The patent applies local quality by differentiating the treatment of different channel regions. Unreserved regions are specifically designated for bi-directional time block allocation to guarantee time limits for critical data packets, while reserved regions continue to be used for other purposes. This localized differentiation ensures that time-critical transmissions get guaranteed resources without completely blocking the entire channel, thus balancing reliability and productivity.
Solution Approach 2:
The patent applies partial action by allocating only the necessary bi-directional time blocks in unreserved regions rather than reserving the entire channel. The coordinator calculates the minimum required time blocks based on RTT and allocates only those specific portions, allowing other devices to use remaining channel resources. This partial reservation approach guarantees time limits for critical packets while maintaining overall channel productivity.
3Reliability
If channel allocation is done without considering RTT, then allocation process is simple, but transmission time limits cannot be met
Solution Approach 1:
The patent applies feedback by incorporating RTT measurement results into the channel allocation process. The coordinator receives feedback about the actual round trip time experienced by data packets and uses this information to adjust and optimize future time block allocations. This feedback mechanism ensures that allocated time blocks are sufficient to meet time limits while allowing the system to adapt to varying network conditions, balancing reliability with manageable complexity.
Data Source
AI summary
A present invention is related to a method for transmitting a data packet in a wireless network. An exemplary method comprises requesting to allocate a bi-directional channel time block including a first channel time block for transmitting a specific data packet and a second channel time block for receiving a response to the specific data packet; transmitting the specific data packet through the first channel time block; and receiving the response to the specific data packet through the second channel time block, wherein the bi-directional channel time block is predetermined to be allocated in an unreserved region in a superframe.