Method and apparatus for maintaining communications when radio communication is unavailable
First Claim
1. A method for maintaining communications between a mobile computer and a mobile subscriber unit comprising the steps of determining whether a connection is available between the mobile subscriber unit and a radio communications system and if a connection is available, retrieving a first IP address for the mobile computer from the radio communications system;
- caching the first IP address in the mobile subscriber unit for use by the mobile computer; and
utilizing the first IP address even if the radio communications system is unavailable and then updating the first IP address with a second IP address obtained from the radio communications system when the radio communications system is available.
2 Assignments
0 Petitions
Accused Products
Abstract
A method and apparatus for maintaining communications between a mobile computer and a mobile subscriber unit is disclosed. The method and apparatus comprise determining whether a connection is available between the mobile subscriber unit and a radio communications system. If a connection is available, then the method and apparatus include retrieving a first IP address for the mobile computer from the radio communications system. Then, the method and apparatus comprise caching the first IP address in the mobile subscriber unit for use by the mobile computer. Finally, the method and apparatus include utilizing the first IP address even if the radio communications system is unavailable and updating the first IP address with a second IP address obtained from the radio communications system when the radio communications system is available.
8 Citations
15 Claims
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1. A method for maintaining communications between a mobile computer and a mobile subscriber unit comprising the steps of
determining whether a connection is available between the mobile subscriber unit and a radio communications system and if a connection is available, retrieving a first IP address for the mobile computer from the radio communications system; -
caching the first IP address in the mobile subscriber unit for use by the mobile computer; and
utilizing the first IP address even if the radio communications system is unavailable and then updating the first IP address with a second IP address obtained from the radio communications system when the radio communications system is available. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An adaptive routing system for maintaining communications between a mobile computer and a mobile subscriber unit comprising:
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the mobile computer connected by a wired interface to the mobile subscriber unit wherein the mobile subscriber unit contains cache memory for storing an IP address retrieved from a radio communications network and the mobile subscriber unit is connected to the radio communications system by a wireless link, wherein communications are maintained between the mobile subscriber unit and the mobile computer when the wireless link is unavailable. - View Dependent Claims (11, 12, 13)
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14. A system for maintaining communications between a mobile computer and a mobile subscriber unit comprising the steps of
means for determining whether a connection is available between the mobile subscriber unit and a radio communications system and if a connection is available, means for retrieving a first IP address for the mobile computer from the radio communications system; -
means for caching the first IP address in the mobile subscriber unit for use by the mobile computer; and
means for utilizing the first IP address even if the radio communications system is unavailable and then updating the first IP address with a second IP address obtained from the radio communications system when the radio communications system is available. - View Dependent Claims (15)
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Specification