HRPD Non-3GPP2 SystemInfo Transfer Message
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Solution Overview
Problem
The existing CDMA2000 HRPD system faces challenges in sending and responding to non-3GPP2 system information without modifying or extending the overhead message sub-protocol of the air interface protocol stack, which complicates the integration with new generation wideband wireless communication systems like LTE and WiMax, leading to increased change costs and difficulties in upgrading mobile terminals.
Innovation Solution
A method and apparatus are introduced to send and respond to non-3GPP2 system information by defining a new non-3GPP2 SystemInfo Transfer message within the application layer of the HRPD system, using a multimode mobile terminal to parse and store this information, and encapsulate a response message, thereby avoiding modifications to the air interface protocol stack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the system information of target network is transmitted by broadcast by extending existing overhead message, then wireless resources are saved and uniform transmission is achieved, but modification/extension of overhead message sub-protocol is required which increases change cost
Solution Approach 1:
The patent introduces a new application layer message type (SystemInfoTransferMsg) as an intermediary carrier for non-3GPP2 system information. This message is transmitted through the existing HRPD signaling channels without modifying the underlying air interface protocol stack, thus avoiding protocol complexity changes while still achieving efficient resource utilization.
Solution Approach 2:
The patent moves the system information transmission from the air interface protocol layer (physical layer) to the application layer. By placing the system information in a higher layer message structure, the solution avoids modifying lower layer protocols while maintaining transmission efficiency.
2Ease of operation
If broadcast transmission mode is used for system information, then uniform transmission mode is achieved, but required modification/extension of overhead message sub-protocol causes increase in change cost
Solution Approach 1:
The patent uses a new application layer message (SystemInfoTransferMsg) as an intermediary that can be carried over existing HRPD channels. This intermediary message structure allows uniform transmission of system information to multiple terminal types without requiring modifications to the air interface protocol, thereby reducing upgrade costs.
Solution Approach 2:
The patent designs the SystemInfoTransferMsg to be universally applicable across different terminal types (3GPP2 and non-3GPP2) by utilizing the existing HRPD application layer framework. This universal message structure can be processed by terminals without requiring terminal-specific protocol modifications, reducing manufacturing and upgrade costs.
3Device complexity
If new application layer message is defined for non-3GPP2 system information, then protocol stack modification is avoided, but new message processing mechanism is required
Solution Approach 1:
The patent segments the system information transmission function into a separate application layer message handling mechanism. By isolating the non-3GPP2 system information processing in a dedicated message type (SystemInfoTransferMsg), the solution avoids complicating the core air interface protocol stack while introducing targeted processing logic only where needed.
Data Source
AI summary
The present invention discloses a method for sending non-3GPP2 system information in a high rate packet data system, which comprises: setting a non-3GPP2 SystemInfo Transfer message in an HRPD system; generating the non-3GPP2 SystemInfo Transfer message and sending it to a multimode mobile terminal supporting both the HRPD system and the non-3GPP2 system when a network side of the HRPD system determines that the multimode mobile terminal is located in an area covered by the HRPD system together with the non-3GPP2 system. The present invention also discloses a method for responding to the non-3GPP2 system information. The present invention further discloses apparatuses for realizing the above-mentioned methods. The present invention is simple and practical.