Persistent MU-MIMO Allocation With Reduced EHT WLAN Signaling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for communication apparatuses and methods that provide feasible technical solutions for persistent allocation (PA) in the context of Extremely High Throughput (EHT) WLAN, which supports increased channel bandwidth, spatial streams, and multi-band operation, but such solutions have not been discussed in existing standards.
Innovation Solution
The implementation of a communication apparatus and method that generates and transmits signals with a user-specific allocation determined to be persistent or not, reducing signaling overhead by omitting user information for recurring transmissions in the User Specific field of EHT MU-MIMO allocations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If user information is transmitted for every downlink MU-MIMO allocation, then allocation flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent segments user information transmission into two parts: common information transmitted once for persistent allocations, and dynamic information transmitted only when allocations change. This segmentation allows the system to maintain allocation flexibility through dynamic updates while reducing signaling overhead by avoiding redundant transmissions of unchanged user information.
Solution Approach 2:
The patent implements preliminary action by establishing persistent user information in advance for recurring downlink MU-MIMO allocations. This preliminary establishment of user information allows subsequent transmissions to reference the pre-configured data, eliminating the need to retransmit identical information and thereby reducing signaling overhead while maintaining allocation flexibility when changes are needed.
2Loss of information
If persistent allocation is implemented for recurring transmissions, then signaling overhead is reduced, but adaptability to traffic changes decreases
Solution Approach 1:
The patent applies dynamics by designing a hybrid allocation mechanism that combines persistent (static) configurations with dynamic update capabilities. The system maintains persistent user information for stable traffic patterns but allows dynamic modification when traffic conditions change, achieving both signaling overhead reduction and traffic adaptability through this dynamic-static combination approach.
Solution Approach 2:
The patent utilizes parameter changes by allowing the system to switch between persistent allocation mode and dynamic allocation mode based on traffic characteristics. When traffic is stable, the system uses persistent parameters to reduce signaling; when traffic changes, the system modifies parameters dynamically, thus achieving both overhead reduction and adaptability through parameter flexibility.
3Productivity
If maximum channel bandwidth is increased to 320 MHz, then throughput capacity is improved, but system complexity increases
Solution Approach 1:
The patent segments the 320 MHz channel bandwidth into manageable allocation units that can be independently configured for persistent allocations. This segmentation allows the high-capacity bandwidth to be divided into smaller resource blocks, maintaining throughput capacity while reducing the complexity of managing the entire bandwidth as a single unit through granular persistent allocation settings.
4Productivity
If maximum spatial streams are increased to 16, then peak throughput is improved, but processing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring spatial stream allocations for persistent downlink MU-MIMO transmissions. This preliminary configuration of spatial stream parameters allows the system to handle 16 spatial streams at peak throughput while reducing processing complexity during actual transmissions, as the complex spatial mapping and resource allocation decisions are made in advance and stored for reuse.
Data Source
AI summary
The present disclosure provides communication apparatus and communication method for user-specific persistent allocation. A communication apparatus comprises circuitry which, in operation, generates a transmission signal comprising a common field, a user specific field and a data field, the common field including RU information for each of one or more allocations in the data field and the user specific field including one or more user information, each indicating a user-specific allocation among the one or more allocations in the data field; and a transmitter, which, in operation, transmits the generated transmission signal; wherein the user specific field is free from at least one user information for a persistent allocation containing a recurring transmission among the one or more allocations.