Multicast Polling for Wireless User Data Transmission
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Solution Overview
Problem
In existing wireless network technologies, access points can only query one user at a time for scheduling requests, leading to increased data transmission delays and reduced service quality due to higher probabilities of invalid polls.
Innovation Solution
A method and apparatus for user data transmission that involves transmitting a multicast frame with a long training sequence and spread spectrum sequence to multiple users in a group, allowing for simultaneous feedback and scheduling of data transmission based on user requests, thereby reducing invalid polls and improving service quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the access point queries only one user at a time for scheduling requests, then the system complexity is reduced and operation is simplified, but the data transmission delay increases and service quality deteriorates
Solution Approach 1:
The patent merges multiple individual polling operations into a single multicast polling frame that can query multiple users simultaneously. The access point sends one multicast frame containing polling information for multiple users, and receives multiple feedback responses in parallel, thereby reducing the total number of polling operations and eliminating sequential delays while maintaining manageable system complexity through standardized frame structures.
Solution Approach 2:
The patent implements periodic multicast polling where the access point sends polling frames at regular intervals to multiple users simultaneously. This periodic action allows the system to efficiently cycle through multiple users in structured time slots, reducing overall transmission delay compared to sequential polling while maintaining systematic control over the polling process.
2Ease of operation
If the access point queries only one user at a time, then the polling process is simplified and easier to manage, but the probability of invalid polls increases and service quality decreases
Solution Approach 1:
The patent combines multiple polling operations into a single multicast frame that queries multiple users simultaneously. This merging approach maintains ease of operation through standardized frame formats and centralized control, while dramatically improving poll validity probability by ensuring that multiple users are queried in each polling cycle, reducing the likelihood of invalid or wasted polls.
Solution Approach 2:
The patent implements a feedback mechanism where multiple users respond to the multicast polling frame simultaneously, sending back their scheduling requests or acknowledgments. This feedback approach allows the access point to efficiently identify which users have data to transmit, improving the validity of polling operations while maintaining manageable complexity through structured response handling.
3Loss of time
If multiple users are queried simultaneously using multicast frames with allocated sequences, then data transmission delay is reduced and service quality improves, but the system complexity and sequence allocation requirements increase
Solution Approach 1:
The patent merges multiple individual polling operations into a single multicast frame that queries multiple users simultaneously using allocated sequences. This approach reduces data transmission delay by eliminating sequential polling delays, while the sequence allocation complexity is managed through standardized assignment rules where each user in the multicast group is pre-assigned specific training sequences and spread spectrum sequences for their feedback responses.
Solution Approach 2:
The patent changes the polling parameter from sequential single-user querying to parallel multi-user querying using distinct sequences. By allocating different training sequences and spread spectrum sequences to different users, the system enables simultaneous polling operations, reducing transmission delay while managing complexity through parameter-based user differentiation rather than procedural complexity.
4Reliability
If multiple users are queried simultaneously, then the probability of invalid polls decreases and service quality improves, but the requirement for unique sequence allocation per user increases
Solution Approach 1:
The patent combines multiple polling operations into a single multicast frame that queries multiple users simultaneously, each identified by allocated sequences. This merging approach improves poll validity probability by ensuring multiple users are queried in parallel, while the quantity of sequences required is optimized by reusing sequence patterns across users through systematic allocation rather than requiring entirely unique sequences for each user.
Solution Approach 2:
The patent uses parameter changes in the form of allocated training sequences and spread spectrum sequences to differentiate users during simultaneous polling. By varying these sequence parameters systematically across users in the multicast group, the system achieves high poll validity through parallel querying while managing the quantity of sequences through structured parameter assignment rather than requiring exhaustive unique sequences.
Data Source
AI summary
A method, an apparatus and a network device for user data transmission are provided, where the method includes: transmitting a multicast frame for acquiring a user scheduling request to users in a user group, the multicast frame includes a long training sequence and a spread spectrum sequence(s) allocated to all users in the user group; receiving the user scheduling request(s) fed back by a user(s) with data transmission in the user group, the user scheduling request(s) is fed back by the user(s) using at least one of the long training sequence(s) and the spread spectrum sequence(s) allocated to the user(s); scheduling user data transmission according to the user scheduling request(s). According to embodiments of the present disclosure, the delay of users with data transmission is reduced, and the quality of service for the system is improved.