WLAN Resource Scheduling With Predefined RU Locations
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Solution Overview
Problem
Current resource scheduling methods in multi-user transmission systems, such as OFDMA and MU-MIMO, require significant transmission resources due to the increasing length of bit sequences needed to indicate resource allocations as bandwidth increases, leading to high overheads.
Innovation Solution
A resource scheduling method that utilizes a next-generation protocol to predefined locations of resource units in the frequency domain, allowing flexible generation of bit sequences to indicate actual allocations, reducing the need for lengthy bit sequences by indicating whether a resource unit is allocated at specific locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a bit sequence is used to indicate resource units in a bandwidth to be allocated, then resource allocation can be performed, but transmission resource overheads increase as bandwidth increases
Solution Approach 1:
The bandwidth is divided into multiple subbands, and resource allocation is performed independently for each subband. This segmentation allows the bit sequence length to be reduced because each subband requires fewer bits to represent its resource units, while still providing comprehensive resource allocation capability across the entire bandwidth.
Solution Approach 2:
The patent introduces a new dimension by predefining specific locations of resource units in the frequency domain. Instead of using a general bit sequence to indicate any resource unit, the system defines specific positions where resource units may be allocated, allowing the bit sequence to only indicate whether resources are allocated at these predefined locations, thereby reducing the number of bits required.
2Adaptability or versatility
If the bandwidth increases, then more resource units can be allocated, but the length of the bit sequence increases continuously
Solution Approach 1:
By dividing the bandwidth into multiple subbands with fewer resource units each, the patent maintains the ability to allocate resources across the entire bandwidth while reducing the bit sequence length required for each subband. The overall allocation capability is preserved through the combination of subband allocations.
Solution Approach 2:
The patent changes the parameter of resource unit representation by predefining specific locations in the frequency domain. Instead of using a variable-length bit sequence that scales with bandwidth, the system uses a fixed set of predefined locations that can be indicated with fewer bits, thereby decoupling bit sequence length from bandwidth size.
3Ease of operation
If resource scheduling information is transmitted to indicate actual allocation, then resource allocation can be performed, but transmission resources are occupied
Solution Approach 1:
The patent extracts and removes redundant information from the resource scheduling message by predefining resource unit locations. Instead of transmitting complete resource allocation information, the system only transmits indicators for predefined locations, thereby reducing transmission resource occupation while maintaining full resource scheduling capability.
Solution Approach 2:
The patent performs preliminary action by predefining the locations of resource units in the frequency domain before resource allocation occurs. This preliminary definition allows the resource scheduling information to be compressed, as the receivers already know the possible locations and only need to be informed of which specific locations are allocated, reducing the transmission resources required.
Data Source
AI summary
Embodiments provide a resource scheduling method, which can support reduction of transmission resource overheads in resource scheduling. The method is applied to a wireless local area network, where a next generation protocol followed by the wireless local area network predefines locations of resource units possibly allocated from a to-be-assigned frequency domain resource. The method includes: generating, by a sending end, resource scheduling information, where the resource scheduling information includes a bit sequence to indicate an actual allocation of a resource unit(s) from the to-be-assigned frequency domain resource, and at least some bits in the bit sequence are to indicate whether one or more of said resource unit locations possibly allocated for the to-be-assigned frequency domain resource is\are the actually allocated resource unit(s).