 Location dependent services |
| Embodiments of the present invention aim to address one or several of the above problems. According ... |
|
| Call processing system with call screening |
| For many years the telephone system in general has known certain information about the phone from ... |
|
| Communications device within a doll |
| The device according to the invention is a doll-like communications device constructed on a digital ... |
|
| Establishing a communication link |
| This objective is achieved by a method and devices having the features of the independent claims. T... |
|
| Method and apparatus of providing audio feedback over a digital channel |
| The present invention is a novel apparatus and method of providing the ability to audibly monitor ... |
|
| Data transfer device for a portable telephone |
| An object of the present invention is to provide a data transfer device for a portable telephone ... |
|
| Method and devices for transmitting short messages |
| To solve the above-mentioned problem or at least to mitigate it, a mobile station has been invented,... |
|
| Method and apparatus for transmitting data to a pager in a communications system |
| It is one object of the present invention to provide an improved data processing system. It is ... |
|
| Portable communication terminal |
| It is an object of the present invention to provide a portable communication terminal for ... |
|
| Efficient frame tracking in mobile receivers |
| A method for frame tracking of a wireless communication channel is provided which allows signal ... |
|
|
Method and apparatus to maintain connectivity for mobile terminals in wireless and cellular communications systems
| Details |
Inventors: Rappaport, Stephen S.; Park, Yunsang;
Assignee: Research Foundation of State University of New York (Stony Brook, NY)
Primary Examiner: Urban; Edward F.
Assistant Examiner: Gary; Erika A.
Attorney, Agent or Firm: F. Chau & Associates, LLP
The present invention is directed to a system and method that allows mobile platforms each supporting any of a variety of call types, and each having differing mobility characteristics, to maintain connectivity to a backbone network in spite of unreliable radio links that occasionally fail. It accomplishes this by using automatic and user-transparent reconnection attempts for appropriate call sessions when an interruption of the link occurs. The network may be supporting a variety of different call types simultaneously. Access to network connectivity resources can be provided according to call session priority based on (for example, call session type, platform mobility, hand-off status, and user class (fee-for-service)) criteria. The technology allows support of suspended sessions and uses repeated reconnection attempts with priority access to network resources. It also provides for hand-offs of suspended sessions to neighboring gateways as mobile terminals move throughout the service area. In a network that uses this technology, for example, voice calls (typical of time-sensitive stream traffic) may preempt resources of time-insensitive data calls causing suspended sessions that do not result in session failures. Priority access for hand-offs of active sessions with respect to new call sessions can be accommodated. Mobile users that have some autonomy or who are perhaps exchanging time-insensitive data with a remote site can continue to function essentially undisturbed by link failures since the connectivity and reconnection procedures are managed by the network in a manner that is transparent to the end users. Mobile computing sessions and delay-insensitive data communications, for example, will be able to continue, largely unaware of link failures. |
|
DETAILED DESCRIPTION The present invention is directed to a system and method for controlling admission to a mobile communications system, which allows mobile platforms each supporting any of a variety of call types, and each having differing mobility characteristics, to maintain connectivity to a backbone network in spite of unreliable radio links that occasionally fail.
The present invention employs an admission protocol that provides automatic and user-transparent reconnection attempts for appropriate call sessions when an interruption of the link occurs.
Further, a network that employs an admission protocol of the present invention may support a variety of different call types simultaneously, wherein access to network connectivity resources can be provided according to call session priority based on (for example, call session type, platform mobility, hand-off status, and user class (fee-for-service)) criteria.
The admission control protocol provides support of suspended sessions and uses repeated reconnection attempts with priority access to network resources, and provides for hand-offs of suspended sessions to neighboring gateways as mobile terminals move throughout the service area.
In a network that employs an admission control protocol according to the present invention, voice calls, for example (or other time-sensitive stream traffic) may preempt resources of time-insensitive data calls, which result in suspended sessions that do not result in session failures.
Priority access for hand-offs of active sessions with respect to new call sessions can also be accommodated.
Mobile users that have some autonomy or who are perhaps exchanging time-insensitive data with a remote site can continue to function essentially undisturbed by link failures since the connectivity and reconnection procedures are managed by the network in a manner that is transparent to the end users.
Mobile computing sessions and delay-insensitive data communications, for example, will be able to continue, largely unaware of link failures
|
|
Ring Tones 
