Wireless transmission system between base stations and a mobile terminal station

• US 5,940,386 A
• Filed: 11/25/1996
• Issued: 08/17/1999
• Est. Priority Date: 11/23/1995
• Status: Expired due to Fees

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Alger-Meunier, Michael, Ammar, Yousif
• Primary Examiner(s): TON, DANG T
• Application Number:
  US08/753,364
• Time in Patent Office: 995 Days
• Field of Search: 370/350, 370/341, 370/328, 370/503, 370/527, 370/529, 370/509, 370/510, 370/512, 370/517, 370/522, 370/524, 370/310, 370/465, 370/466, 370/467, 370/342, 370/441, 370/442 , 370/320, 370/335, 370/479, 370/480, 455/67.1, 455/528, 455/411, 455/15, 455/436, 380/49, 380/48
• US Class Current: 370/350
• CPC Class Codes: H04J 3/0647 Synchronisation among TDM nodes
• CPC Class Codes: H04J 3/0682 by delay compensation, e.g. by compensation of propagation delay or variations thereof, by ranging

Abstract

A transmission system includes a central station, a counterpart station and at least two base stations connected to the central station through at least one interface. The base stations wirelessly exchange signals with at least one mobile terminal station. At least one Uko standard interface is expanded by a device for transmitting and delaying synchronizing signals, in such a way that a transmission of the at least one Uko interface that is synchronized with the other interfaces is attained.

Claims

1. A transmission system, comprising:

a central station;

a counterpart station connected to said central station;

at least one mobile terminal station;

at least one interface connected to said central station;

at least two base stations connected through said at least one interface to said central station, said at least two base stations wirelessly exchanging signals with said at least one mobile terminal station;

said counterpart station outputting signals transmitted through said central station and said base stations to said at least one mobile terminal station;

said at least one mobile terminal station outputting signals transmitted through said base stations and said central station to said counterpart station;

at least one of said interfaces according to the Uko standard connected between said central station and one of said base stations;

a device for transmitting synchronizing signals through said at least one interface according to the Uko standard; and

a device for delaying the synchronizing signals and data streams to be transmitted, for chronologically fixedly coupling at least one of said base stations connected through said at least one interface according to the Uko standard to said the central station in the same way as a remainder of said base stations.

2. The transmission system according to claim 1, wherein said device for transmitting synchronizing signals through said at least one interface according to the Uko standard, is an embedded operating channel of said at least one interface according to the Uko standard, transmitting the synchronizing signals in the form of embedded operating channel reports from said central station to at least one of said base stations connected through said at least one interface according to the Uko standard.

3. The transmission system according to claim 1, wherein said at least one interface according to the Uko standard includes a transmission structure having a superframe with a plurality of subordinate basic frames, and including a reset device resetting said basic and superframes in a defined manner upon an appearance of synchronizing signals.

4. The transmission system according to claim 1, including a transmission system clock from which a master clock is derived for controlling said device for delaying the synchronizing signals.

5. The transmission system according to claim 1, wherein said central station has an integrated services digital network oriented modular interface furnishing the synchronizing signals.

6. The transmission system according to claim 5, wherein the synchronizing signals are monitor commands of said integrated services digital network oriented modular interface, transmitted as embedded operating channel reports to at least one of said base stations connected through said at least one interface according to the Uko standard.

7. The transmission system according to claim 6, wherein said device for delaying the synchronizing signal is a delay device delaying the embedded operating channel reports in accordance with a corresponding monitor command of said integrated services digital network oriented modular interface up to one edge of a master clock.

8. The transmission system according to claim 6, wherein at least one of said base stations has a code conversion device converting reports received through said at least one interface according to the Uko standard, to an integrated services digital network oriented modular standard.