Uplink Resource Block Allocation for Dense WLAN OFDMA
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Solution Overview
Problem
Current wireless local area network standards, such as IEEE802.11ac, fail to meet the increased data transmission rate requirements in highly dense application scenarios, necessitating a redesign of subcarrier and pilot allocation in UL OFDMA systems to support multiple users simultaneously.
Innovation Solution
An uplink service transmission method and apparatus that divides a channel into resource blocks based on the number of connected stations, allocates data subcarriers and pilots efficiently, and sends channel allocation indication information to each station, allowing multiple stations to transmit uplink information in parallel using allocated resource blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the current wireless local area network standard (IEEE802.11ac) is used, then the system is simple to operate, but it cannot satisfy the requirement of users on data transmission rate in highly dense application scenarios
Solution Approach 1:
The patent divides the entire channel into multiple resource blocks (RBs), each RB containing a specific number of subcarriers and pilots. This segmentation allows multiple users to be served simultaneously in different frequency resources, increasing the data transmission rate in dense scenarios while maintaining manageable system complexity through structured resource allocation
Solution Approach 2:
The patent dynamically adjusts the number of resource blocks and pilots allocated to each user based on channel conditions and user requirements. The access point can flexibly configure RB allocation and pilot patterns (e.g., different pilot densities for different users) to optimize transmission rates adaptively without requiring complete system redesign
2Quantity of substance
If multiple users are allocated on the same bandwidth simultaneously, then the quantity of users increases, but the subcarrier and pilot allocation becomes more complex
Solution Approach 1:
By segmenting the frequency spectrum into discrete resource blocks with standardized structures (each RB containing specific numbers of subcarriers and pilots), the patent enables systematic multi-user allocation. Each user can be assigned specific RBs and pilot positions according to their needs, supporting multiple simultaneous users while keeping allocation rules structured and manageable
Solution Approach 2:
The patent allows different pilot densities and resource block allocations for different users within the same bandwidth. Users with poorer channel conditions can be allocated more pilots or specific RBs with better channel characteristics, while users with good conditions receive fewer resources. This localized optimization enables supporting more users simultaneously with tailored allocations rather than uniform complex structures
3Loss of energy
If resource blocks are allocated to multiple stations, then spectrum utilization improves, but the channel allocation indication information becomes more complex
Solution Approach 1:
The patent segments channel allocation information into standardized fields that indicate resource block assignments for each user. By using structured indication formats that reference pre-defined resource block structures, the system can efficiently convey allocation information to multiple users without proportionally increasing complexity, as the segmented RB structure allows compact representation of allocations
Data Source
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AI summary
An uplink service transmission method and apparatus and a wireless local area network access point are disclosed. In the uplink service transmission method, an access point divides an entire channel into resource blocks according to a quantity of stations that are connected to the access point, then allocates, to each station according to channel estimation information of each station, a resource block used to transmit uplink information, and separately sends channel allocation indication information to each station, so that each station finds, according to the channel allocation indication information, the resource block corresponding to the station, and transmits the uplink information by using the resource block, so as to implement that in an OFDMA system, multiple stations transmit uplink information in parallel, that is, resource blocks that are obtained by means of division can be simultaneously applicable to multiple stations. In conclusion, in the uplink service transmission method, a parameter of a resource block of a channel is determined according to a different quantity of stations, that is, a finally configured resource block can be simultaneously applicable to multiple stations, so that the multiple stations simultaneously transmit uplink information, thereby increasing a quantity of users that can access the channel.