Method and end station with improved user reponse time in a mobile network
First Claim
1. A mobile data intermediate system (MDIS) comprising:
- an input-output module coupled to a mobile end station and coupled to a fixed end station;
a hand-off detector, coupled to the input-output module; and
a packet generator coupled to the hand-off detector and coupled to the input-output module, wherein the packet generator transmits from at least a level as high as a transport layer, a notification packet to the mobile end station.
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Accused Products
Abstract
A method and apparatus of improving user response time during cellular hand-offs and radio frequency changes in a Transmission Control Protocol/Internet Protocol (TCP/IP) mobile environment. In the mobile environment there is at least a mobile end station (20), a mobile data base station (22), a mobile data intermediate system (MDIS) (30) and a fixed end station (40). The MDIS (30) keeps track of the mobile end station (20) as it roams through the mobile environment. As a result, the MDIS (30) can distinguish between delays due to network congestion and delays due to cellular hand-offs. Further, the mobile data base station (22) informs the MDIS (30) of any changes in the radio frequency signal, thus allowing the MDIS (30) to also recognize delays due to changes in the radio frequency signal. With the knowledge of being able to identify the cause of the delays, the MDIS (30) is able to initiate or suppress a congestion control and recovery process.
46 Citations
6 Claims
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1. A mobile data intermediate system (MDIS) comprising:
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an input-output module coupled to a mobile end station and coupled to a fixed end station; a hand-off detector, coupled to the input-output module; and a packet generator coupled to the hand-off detector and coupled to the input-output module, wherein the packet generator transmits from at least a level as high as a transport layer, a notification packet to the mobile end station. - View Dependent Claims (2, 3)
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4. A method comprising the steps of:
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at a mobile data intermediate system (MDIS); identifying at least one of the following events has occurred;
a cellular hand-off and a radio frequency signal change;sending a notification packet from at least as high as a transport layer; at a mobile end station; receiving the notification packet at an application layer; sending the notification packet from the application layer to a transport layer; and bypassing a congestion control and recovery process in the transport layer. - View Dependent Claims (5, 6)
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Specification