WiMAX Idle Mode Timer Negotiation and Synchronization
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Solution Overview
Problem
Current Wimax network protocols lack a standardized method for negotiating and transmitting location update time length information between access service network gateways and mobile stations, leading to inconsistencies in idle mode timer management.
Innovation Solution
A method is introduced to negotiate and transmit location update time length information within the Wimax network architecture, where mobile stations and access service network gateways interact to establish and maintain consistent idle mode timer lengths through requests, negotiations, and message exchanges, using strategies such as presetting or previously negotiated timer lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no standardized method is used for negotiating location update time length information, then the network protocol implementation is simpler, but inconsistencies in idle mode timer management occur between network and mobile stations
Solution Approach 1:
The patent applies preliminary action by negotiating and establishing the idle mode timer length before the mobile station enters idle mode. The ASN-GW and MS exchange location update time length information through location update requests and responses, pre-synchronizing their timer values before idle mode operation begins. This prevents timer inconsistencies from occurring during idle mode operation.
Solution Approach 2:
The patent implements feedback by having the ASN-GW send location update time length information to the mobile station through location update responses. The network provides feedback about the authorized timer length to the MS, ensuring the mobile station's timer settings align with network expectations. This feedback mechanism maintains synchronization between network and terminal timer values.
2Reliability
If location update time length information is negotiated and transmitted between ASN-GW and MS, then timer synchronization is maintained, but additional message exchanges are required
Solution Approach 1:
The patent merges the location update time length information negotiation into existing location update procedures. The ASN-GW includes location update time length information in location update responses that are already being exchanged for mobility management purposes. This combining approach maintains timer synchronization without adding separate dedicated message exchanges, thus reducing overall signaling overhead.
3Productivity
If idle mode timer length is preset or previously negotiated, then negotiation overhead is reduced, but adaptability to different network conditions decreases
Solution Approach 1:
The patent applies dynamics by allowing the idle mode timer length to be dynamically adjusted based on network conditions and mobile station behavior. The ASN-GW can authorize different location update time lengths for different MSs or at different times, and can modify these authorizations through subsequent location update responses. This dynamic approach maintains high negotiation efficiency while preserving adaptability to varying network conditions.
Data Source
AI summary
A method for negotiating and transmitting location update time length information, applied in a Wimax network architecture, comprises: a mobile station initiating a request for initially accessing a network, a request for entering an idle mode, or a request for a location update to a services access service network gateway; when receiving said request, said services access service network gateway negotiating an idle mode timer length, and notifying said mobile station of the negotiated idle mode timer length. The present invention can implement the negotiation and transmission of location update time length information between access service network gateways as well as between an access service network gateway and a mobile station in a Wimax network so that the location update time lengths of the network side and the mobile station maintain consistent.