Wireless Packet Transmission with Tail Field Positioning
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting packets of varying lengths to multiple users, leading to resource waste and reduced performance due to the limitations of existing MAC protocols and packet structures.
Innovation Solution
A method and apparatus for simultaneously transmitting packets of different lengths to multiple users in a wireless communication system, where each packet includes information on the position of its tail field, such as the maximum symbol number, transmission data symbol number, and positional information of a last A-MPDU subframe, allowing for efficient processing and reducing reception overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If packets of different lengths are transmitted to multiple users using existing MAC protocols, then resource waste occurs and performance decreases, but if packets are transmitted sequentially to avoid resource waste, then transmission efficiency and productivity decrease
Solution Approach 1:
The patent segments the transmission process by dividing packets into multiple segments and transmitting them in parallel to multiple users simultaneously. Each user receives a specific segment of the aggregated packet, allowing efficient utilization of wireless resources while maintaining high transmission throughput. This segmentation approach resolves the contradiction by enabling parallel transmission without causing resource waste through sequential processing.
Solution Approach 2:
The patent introduces a new dimension to packet transmission by implementing multi-user parallel transmission capabilities. Instead of transmitting packets sequentially in the time domain, the system transmits multiple packets simultaneously across different spatial dimensions (multiple users), thereby increasing productivity without causing resource waste through repeated channel access attempts.
2Adaptability or versatility
If packet length is standardized to simplify processing, then transmission flexibility and adaptability decrease, but if packet length varies, then reception processing complexity and device complexity increase
Solution Approach 1:
The patent applies preliminary action by embedding length indicator information in the packet header before transmission. This allows the receiver to pre-determine the packet length and allocate appropriate processing resources in advance, simplifying the reception process despite varying packet lengths. The receiver uses the length indicator to efficiently parse and process only the necessary portion of the received signal, reducing overall processing complexity while maintaining transmission flexibility.
Solution Approach 2:
The patent changes the parameter representation by introducing explicit length indicator fields in the packet structure. Instead of requiring complex analysis to determine packet boundaries, the system uses standardized parameter indicators that clearly specify packet length, making the reception process simpler while allowing packets of various lengths to be transmitted efficiently to multiple users.
3Productivity
If high throughput is achieved by transmitting more data simultaneously, then reception overhead increases, but if transmission rate is reduced to minimize overhead, then system performance and productivity decrease
Solution Approach 1:
The patent segments the total data stream into multiple parallel transmissions to different users. By dividing the aggregate data load across multiple recipients, each user receives a manageable portion with corresponding overhead, rather than one user receiving the entire aggregated data set. This segmentation reduces the reception overhead per user while maintaining high overall system throughput through parallel processing.
Data Source
AI summary
A method for simultaneously transmitting packets having different lengths to two or more users in a wireless communication system includes: generating the packets which are to be transmitted to the respective users; and simultaneously transmitting the generated packets to the respective users. Each of the packets contains information on the position of a symbol to which a tail field of the packet belongs, and the information on the position of the symbol to which the tail field belongs includes at least one of the maximum symbol number of the packet, the symbol number of transmission data of the packet, positional information of a last aggregated MAC protocol data unit (A-MPDU) subframe, and positional information of a null delimiter.