Wireless Communication Device Frequency Multiplexing Relay Coordination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems with mixed access points connected to both wired and unwired networks, existing technologies face challenges in efficiently routing frames through multiple relay stations, particularly in terms of time-staggered forwarding and bandwidth utilization, especially when using both the 2.4 GHz and 5 GHz bands.
Innovation Solution
A wireless communication device that employs frequency multiplexing to transmit frames addressed to different relay stations and wireless communication devices, using OFDMA (Orthogonal Frequency Division Multiple Access) to efficiently allocate resource units and manage antenna directivity for optimal frame forwarding and acknowledgement responses across multiple access points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If time-staggered forwarding is used among access points in a mesh network, then frame transmission can be coordinated between relay stations, but the transmission time increases depending on the number of hops
Solution Approach 1:
The patent segments the transmission medium by dividing frequency bands into multiple resource units (RUs). Each RU can be independently allocated to different access points for simultaneous transmission, eliminating the need for time-staggered forwarding while maintaining coordination reliability.
Solution Approach 2:
The patent transitions from time-domain multiplexing (time-staggered forwarding) to frequency-domain multiplexing (OFDMA). By utilizing the frequency dimension, multiple access points can transmit simultaneously without interfering with each other, thus reducing transmission time while preserving forwarding reliability.
2Productivity
If both 2.4 GHz and 5 GHz bands are used for simultaneous receiving and transmitting, then relay stations can perform receiving and transmitting simultaneously, but two bands are required
Solution Approach 1:
The patent segments a single frequency band into multiple orthogonal resource units that can be simultaneously used for different transmissions. This allows simultaneous receiving and transmitting within a single band by allocating different RUs to different functions, eliminating the need for dual-band operation.
Solution Approach 2:
The patent makes a single frequency band universal by enabling it to support multiple simultaneous transmissions through OFDMA. The same band can handle both receiving and transmitting operations concurrently by properly allocating resource units, replacing the need for separate 2.4 GHz and 5 GHz bands.
3Productivity
If frequency multiplexing with OFDMA is used to allocate resource units, then bandwidth utilization is improved, but the system complexity increases
Solution Approach 1:
The patent implements self-service mechanisms where access points autonomously allocate resource units based on local buffer states and transmission needs. This distributed decision-making reduces central coordination complexity while maintaining efficient bandwidth utilization through local optimization.
Solution Approach 2:
The patent employs preliminary actions by pre-configuring resource unit allocations and transmission schedules based on predicted traffic patterns. This allows the system to maintain high bandwidth utilization without real-time complex calculations, as resource allocation decisions are made in advance based on buffer states and QoS requirements.
Data Source
AI summary
According to one embodiment, a wireless communication device includes: a receiver configured to receive a first frame which contains data; and a transmitter configured to transmit a second frame and a third frame by frequency multiplexing, the second frame containing the data and being addressed to a first relay station different from a sender device of the first frame, and the third frame being addressed to a first wireless communication device different from the first relay station.