Wireless Communication Device Trigger Frame Resource Allocation
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Solution Overview
Problem
In wireless communication systems, the efficiency of uplink Orthogonal Frequency Division Multiple Access (UL-OFDMA) is hindered by inefficient resource unit allocation, particularly when terminals are in sleep mode or have no transmission requests, leading to decreased communication resource utilization and reduced quality of service due to random selection of resource units by terminals.
Innovation Solution
A wireless communication device that transmits a trigger frame specifying multiple frequency components without allocating specific resource units to terminals, allowing terminals to select from freely usable resource units based on communication quality, and a controller allocates resource units to terminals based on received information, optimizing resource allocation for improved communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If trigger frame specifies terminals and allocates resource units, then resource allocation is determined, but resource units are not efficiently used when terminals are in sleep mode or have no transmission requests
Solution Approach 1:
Instead of the access point specifying which terminals should use which resource units (traditional approach), the invention inverts the approach by having terminals randomly select resource units from a pool of unassigned resource units indicated in the trigger frame. This inversion allows terminals that are awake and have data to automatically utilize available resources without requiring the access point to know their status, thereby improving resource unit usage efficiency while reducing the complexity of terminal management in the trigger frame.
2Reliability
If terminals randomly select resource units, then frame collision is avoided, but resource unit allocation does not consider communication quality
Solution Approach 1:
The invention introduces a feedback mechanism where terminals measure the communication quality (e.g., signal strength, interference level) of each resource unit before randomly selecting one. The trigger frame includes information about available resource units, and terminals use this feedback to make informed random selections that consider both collision avoidance and communication quality. This feedback loop enables terminals to select resource units that are not only less likely to cause collisions but also have better communication characteristics, thereby resolving the contradiction between random selection benefits and allocation precision.
3Adaptability or versatility
If trigger frame specifies only resource units without terminal specification, then terminal selection flexibility increases, but resource unit allocation efficiency decreases
Solution Approach 1:
The invention applies preliminary action by having the access point pre-identify and indicate a pool of unassigned resource units in the trigger frame before terminals make their selections. This preliminary preparation of resource unit information allows terminals to flexibly choose from available resources without requiring the access point to pre-assign specific units to specific terminals. The preliminary indication of resource unit availability maintains terminal selection flexibility while improving allocation efficiency by preventing terminals from selecting already-allocated or unavailable resource units.
Data Source
AI summary
According to one embodiment, a wireless communication device, includes: a transmitter configured to transmit a first frame that contains first information specifying a plurality of frequency components and does not include second information specifying other wireless communication devices to which the plurality of frequency components are allocated; a receiver configured to receive at least one second frame to be transmitted via at least one of the plurality of frequency components; and allocate a first frequency component selected from among the plurality of frequency components based on third information to a transmitting device of the second frame out of the other wireless communication devices, wherein the receiver is configured to receive the third information through the second frame or a third frame transmitted before the second frame is transmitted.