Wireless Packet Transmission with Length Information
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Solution Overview
Problem
Current wireless communication systems face challenges in supporting high-capacity multimedia services due to low throughput, especially in multi-user environments, where resource waste occurs during channel contention and data transmission efficiency is compromised.
Innovation Solution
A method and apparatus for simultaneously transmitting and receiving packets to multiple users in a wireless communication system, incorporating length information that includes both unit and packet length details, allowing for efficient data transmission and processing, even with varying packet lengths, using a packet structure compatible with IEEE 802.11ac standards and MU-MIMO technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple users share wireless resources using CSMA/CA protocol, then channel access is simple and decentralized, but resource waste occurs during channel contention and throughput decreases
Solution Approach 1:
The patent segments the channel access process into two phases: a contention phase (using CSMA/CA for simplicity) and a transmission phase (using scheduled access for efficiency). During the transmission phase, multiple MPDUs are transmitted at SIFS intervals without repeated contention, eliminating resource waste while maintaining operational simplicity through the two-phase structure.
Solution Approach 2:
The patent applies preliminary action by acquiring transmission rights in advance through the contention phase, then utilizing those rights to transmit multiple packets in a scheduled manner. The TXOP (transmission opportunity) is obtained beforehand, allowing subsequent transmissions to proceed without repeated contention overhead, thus improving throughput while keeping the access mechanism simple.
2Productivity
If burst transmission scheme with multiple MPDUs at SIFS is implemented, then throughput is improved by reducing contention overhead, but complexity increases in packet structure and processing
Solution Approach 1:
The patent merges multiple MPDUs into a single transmission opportunity (TXOP) where multiple packets are transmitted back-to-back at SIFS intervals. This combining approach reduces the number of separate contention cycles needed, improving throughput. The receiver processes these aggregated packets using the length field information, managing complexity through structured aggregation rather than individual packet handling.
Solution Approach 2:
The patent introduces the length field as an intermediary mechanism that carries information about the number and lengths of MPDUs in the burst transmission. This intermediary structure allows the receiver to correctly parse and process multiple aggregated packets without complex processing, as the length field provides the necessary delimitation and identification information, thus managing complexity while maintaining high throughput.
3Adaptability or versatility
If variable length packets are transmitted simultaneously to multiple users, then data transmission flexibility is improved, but receiver processing complexity increases due to varying packet lengths
Solution Approach 1:
The patent incorporates feedback mechanisms where the transmitter includes length information in the packet header (length field) that informs the receiver about the packet structure. This feedback allows the receiver to adjust its processing parameters based on the actual packet length, enabling flexible handling of variable length packets to multiple users while managing processing complexity through informed reception parameters provided by the length field.
Solution Approach 2:
The patent applies local quality by providing user-specific or packet-specific length information within the packet structure itself. Each packet or packet group includes its own length field containing accurate information about its contents, allowing the receiver to process each packet according to its specific length requirements. This localized quality information enables flexible variable length transmission while simplifying receiver processing by providing explicit length guidance for each packet.
Data Source
AI summary
A method for simultaneously transmitting packets to one or more users in a wireless communication system includes: generating the packets which include length information and are to be transmitted to the one or more users; and simultaneously transmitting the generated packets to the one or more users. The length information includes information representing a unit of the length information and information representing lengths of the packets according to the unit.