Dual-mode satellite/cellular phone architecture with physically separable modes

A technology of cellular phone and satellite phone, applied in the direction of radio transmission system, transmission system, electrical components, etc., can solve problems such as cellular network/PCS network interference

Inactive Publication Date: 2000-09-20
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even without this limitation, the local cellular/PCS operator (or regulatory body) would still object to the use of cellular/PCS frequencies f

Method used

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  • Dual-mode satellite/cellular phone architecture with physically separable modes
  • Dual-mode satellite/cellular phone architecture with physically separable modes

Examples

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Embodiment Construction

[0018] Various features of the invention are described below with reference to the drawings, in which like parts are identified by like characters.

[0019] figure 1 To illustrate the basic idea of ​​the present invention, a fully functional cellular / PCS phone 105 and a fully functional, complete stand-alone satellite phone 110 are physically separate from each other. Both the cellular / PCS phone 105 and the standalone satellite phone 110 can work independently. For example, a cellular phone call can be made with a cellular / PCS phone over local cellular service, as shown by cellular base station tower 115 . Likewise, satellite phone 110, represented by satellite 120, can be used to make calls over a satellite communications network.

[0020] figure 1 Also illustrated is a short range low power communication link 125 between the cellular / PCS phone 105 and the satellite phone 110 . When the satellite phone 110 receives a call (that is, when the satellite phone rings), the cel...

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Abstract

In a dual-mode satellite/cellular phone system, a user has the option of placing or receiving calls to and from the satellite network with either the cellular/PCS phone or the fully self-contained, stand-alone satellite phone. If the user places or receives a satellite call with the cellular/PCS phone, the communication signals to and from the cellular/PCS phone will first be received from or transmitted to the sallelite phone over a short-range, low-power communication link. The satellite phone, in turn, communicates directly with the satellite network from a location that is within a short range of the cellular/PCS phone, and from a location that preferably has a direct line-of-sight with the one or more satellites that make up the satellite network.

Description

Background of the invention [0001] The present invention relates to wireless communication systems. More specifically, the present invention relates to wireless communication systems capable of communicating over a local cellular / PCS (Personal Communication System) air interface, or over a satellite air interface. [0002] Dual mode satellite / cellular phones are well known in the art, and they can operate in both cellular / PCS mode and satellite mode. However, compared with ordinary cellular phones, such phones are relatively bulky and relatively heavy. This problem is becoming more and more acute now that cellular technology has made cellular phone handsets about the size and weight of a credit card. [0003] The reason satellite phones and dual-mode cellular / satellite phones are relatively large and heavy compared to standard cellular phones is that the components required to communicate over the satellite air interface are generally smaller than those required to communica...

Claims

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Application Information

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IPC IPC(8): H04B7/185H04W88/06
CPCH04B7/18571H04W88/06H04B7/18563Y02D30/70H04B7/185
Inventor P·D·卡拉比尼斯N·R·C·赖德贝克M·科恩拜
Owner TELEFON AB LM ERICSSON (PUBL)
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