MAC Layer Push Service Transmission in OFDM Wireless Systems

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Solution Overview

Problem

Current push services in broadband wireless communication systems face challenges such as time delays due to TCP connection requirements, inability to function with firewalls, and lack of standards for transmitting push messages in OFDM or OFDMA schemes, particularly in transmitting messages to the application layer without a TCP connection.

Innovation Solution

A system and method for providing a push service based on the Media Access Control (MAC) layer in wireless communication systems, specifically for OFDM or OFDMA schemes, which involves a messaging server requesting a push service from a push server, and the Base Station transmitting push messages directly to the Mobile Station using the MAC layer, bypassing the need for a TCP connection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If HTTP push service is used, then push service can be applied to broadband wireless communication network, but time delay occurs due to TCP connection setup

Engineering Contradiction:

Improveapplicability to broadband wireless communication networkVSAvoidtime delay due to TCP connection setup

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent extracts the push message transmission function from the TCP connection layer and implements it directly at the MAC layer. This separates the push service functionality from the connection-oriented TCP protocol, allowing messages to be transmitted without establishing a full TCP connection, thereby eliminating the connection setup delay while maintaining broadband network compatibility

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces a MAC layer as an intermediary between the application layer and the physical transmission layer. This MAC layer intermediary handles push message transmission independently, bypassing the need for TCP connection establishment while ensuring reliable delivery through MAC layer acknowledgments and retransmission mechanisms

Inventive Principle:

Principle #24Intermediary (Mediator)

2Loss of time

If UDP push service is used, then transmission can occur without TCP connection, but service cannot be guaranteed when firewall exists

Engineering Contradiction:

Improveelimination of TCP connection setup timeVSAvoidservice guarantee when firewall exists

Core Design Contradiction:

Loss of timeVSReliability

Solution Approach 1:

The MAC layer acts as a trusted intermediary that operates below the firewall boundary. Since the MAC layer is part of the wireless communication protocol stack implemented in the terminal and base station, it can transmit push messages directly without being blocked by network firewalls, while still providing reliability through MAC layer acknowledgment and retransmission mechanisms

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent moves the push service transmission from the network layer (where firewalls operate) to the data link layer (MAC layer). This dimensional change in the protocol stack allows messages to bypass firewall restrictions while maintaining reliability through MAC layer error control and acknowledgment mechanisms

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Adaptability or versatility

If standard push transmission is implemented in OFDM/OFDMA systems, then broadband wireless communication can be supported, but no standard exists for transmitting push messages

Engineering Contradiction:

Improvesupport for broadband wireless communicationVSAvoidavailability of transmission standard

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent designs a universal MAC layer push transmission mechanism that can operate in both OFDM and OFDMA broadband wireless communication systems. The MAC layer protocol is configured to handle push messages using existing broadband wireless resources and procedures, making the solution broadly applicable across different broadband standards without requiring new physical layer specifications

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS8264997B2System and method for providing message push service in wireless communication system

Publication Date: 2012.09.11 SAMSUNG ELECTRONICS CO LTD

AI summary

A method and a system for providing a push service in a wireless communication system adopting an Orthogonal Frequency Division Multiplexing (OFDM) scheme or an Orthogonal Frequency Division Multiple Access (OFDMA) scheme are provided. The method includes when receiving a message from another network or another messaging server, transmitting, at a messaging server, a push service request message to a push server; when a Mobile Station (MS) of which the push service is requested using the push service request message of the messaging server, operates in an awake mode, transmitting, at the push server, a first push deliver message comprising a message designated for the MS, to a Base Station (BS), and when receiving the first push deliver message, transmitting, at the BS, a second push deliver message based on a Media Access Control (MAC) layer comprising the message designated for the MS, to the MS.