Multiuser Packet Transmission in Mobile Communication Systems
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Solution Overview
Problem
In mobile communication systems, particularly in the 1xEVDO system, there is a need for an apparatus and method to detect and report the transmission of multiuser packets, which include data for multiple users, and to efficiently process these packets, as existing systems lack a mechanism to designate users and manage mixed data transmission effectively.
Innovation Solution
The proposed solution involves generating and transmitting multiuser packets with a Medium Access Control (MAC) header containing address information for each user, padding '0' bits if necessary, and using data queues to combine data for multiple users, allowing access terminals to determine if their address is included and extract relevant data from the packet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If single user packets are transmitted to each access terminal, then each user receives dedicated data transmission, but bandwidth is wasted when multiple users have data to transmit
Solution Approach 1:
The patent combines multiple users' data into a single multiuser packet that can be transmitted together over the wireless interface. The access network generates one packet containing data for multiple access terminals, identified by including multiple destination addresses in the packet header, thereby consolidating what would otherwise require multiple separate transmissions
Solution Approach 2:
The patent creates a universal packet structure that can serve multiple users simultaneously. The multiuser packet format includes a header with multiple destination addresses and a payload that contains data for each addressed user, allowing a single transmission to fulfill multiple delivery functions
2Productivity
If multiuser packets with multiple user data are transmitted, then bandwidth utilization improves, but there is no mechanism to designate which users should receive the packet
Solution Approach 1:
The patent segments the packet into distinct components: a header containing multiple destination addresses, and a payload containing user data. Each user's data is clearly demarcated and associated with their respective address, allowing the receiving terminal to identify and extract only the data intended for them
Solution Approach 2:
The patent introduces an address field as an intermediary between the transmitted data and the destination users. The address information in the packet header acts as a mediator that enables receiving terminals to identify whether they are the intended recipient and to properly process the packet contents
3Productivity
If access terminals continuously monitor for multiuser packets, then they can receive data efficiently, but processing complexity increases
Solution Approach 1:
The patent performs preliminary identification by placing destination addresses in the packet header before the actual data payload. Access terminals can examine the header first to determine if the packet is intended for them, avoiding the need to process and analyze the entire packet contents when not addressed
Solution Approach 2:
The patent enables access terminals to extract only the relevant portion of the packet data intended for them. By identifying their address in the header, terminals can selectively extract and process only their specific data from the multiuser packet, ignoring other users' data
Data Source
AI summary
An apparatus and method is provided for generating one packet with transmission data and transmitting the packet from an access network transceiver system (ANTS) to a plurality of access terminals (ATs) in a mobile communication system including the ATs and the ANTS which are capable of performing packet data communication with ATs located in coverage thereof. The method includes the steps of generating a medium access control (MAC) header including information on a receiving AT's address, a length and format for transmission data, generating a MAC payload, by consecutively connecting data units to be transmitted to the receiving AT, and generating a MAC trailer. The ANTS pads ‘0’ bits to the MAC header if a predetermined MAC size is greater than a sum of lengths of the MAC header, the MAC payload and the MAC trailer.