Asynchronous data transmission method and arrangement
First Claim
1. An asynchronous data transmission method for transmitting asynchronous data characters and status information of a terminal interface and possibly other control or synchronization information through a synchronous traffic channel or a set of synchronous traffic channels in a telecommunication system, comprising the steps ofA) at a transmitting end:
- removing a predetermined number of start bits and stop bits from between said asynchronous data characters received from the terminal interface, concatenating said asynchronous data characters lacking said start and stop bits, and said terminal interface status information and possibly other control or synchronization information into a protocol data unit beginning with a start bit and ending with a stop bit, processing the protocol data unit according to an asynchronous-to-synchronous conversion, transmitting the processed protocol data unit to a receiving end through said synchronous traffic channel or set of synchronous traffic channels, B) at the receiving end;
extracting said asynchronous data characters, the terminal interface status information and the possible other control or synchronization information from said protocol data unit, adding start and stop bits to said extracted asynchronous data characters in order to restore said original asynchronous data characters.
2 Assignments
0 Petitions
Accused Products
Abstract
An asynchronous data transmission method and a telecommunication system for transmitting asynchronous data characters and status information of a terminal interface and possibly other control and synchronization information through a synchronous traffic channel or a set of synchronous traffic channels. The system has an arrangement including a transmission protocol utilizing an asynchronous-to-synchronous conversion. The transmission protocol has protocol data units for transmission over the traffic channel or set of traffic channels. Each protocol data unit contains a predetermined number of terminal interface asynchronous data characters without start and stop bits, and the terminal interface status information and possibly other control or synchronization information, concatenated between a common start bit and a common stop bit.
-
Citations
13 Claims
-
1. An asynchronous data transmission method for transmitting asynchronous data characters and status information of a terminal interface and possibly other control or synchronization information through a synchronous traffic channel or a set of synchronous traffic channels in a telecommunication system, comprising the steps of
A) at a transmitting end: -
removing a predetermined number of start bits and stop bits from between said asynchronous data characters received from the terminal interface, concatenating said asynchronous data characters lacking said start and stop bits, and said terminal interface status information and possibly other control or synchronization information into a protocol data unit beginning with a start bit and ending with a stop bit, processing the protocol data unit according to an asynchronous-to-synchronous conversion, transmitting the processed protocol data unit to a receiving end through said synchronous traffic channel or set of synchronous traffic channels, B) at the receiving end;
extracting said asynchronous data characters, the terminal interface status information and the possible other control or synchronization information from said protocol data unit, adding start and stop bits to said extracted asynchronous data characters in order to restore said original asynchronous data characters. - View Dependent Claims (2, 3, 4)
transmitting a plurality of protocol data units between the transmitting and receiving ends through said set of traffic channels in accordance with the steps A and B, transmitting inter-channel synchronization information as said possibly other control or synchronization information, restoring the order of data received through different traffic channels in said protocol data units according to said synchronization information. -
3. The method according to claim 1, wherein the telecommunication system is a mobile system comprising an incompatible radio interface containing said traffic channel or set of traffic channels.
-
4. The method according to any one of the preceding claims, wherein said traffic channel is a traffic channel of a satellite system.
-
- 5. A telecommunication system having an arrangement for transmitting asynchronous data characters and status information of a terminal interface and possibly other control and synchronization information through a synchronous traffic channel or a set of synchronous channels, the arrangement comprising a transmission protocol utilizing an asynchronous-to-synchronous conversion, said transmission protocol comprising protocol data units for transmission over said traffic channel or set of traffic channels, each protocol data unit containing a predetermined number of terminal interface asynchronous data characters without start and stop bits, and said terminal interface status information and possibly other control or synchronization information, concatenated between a common start bit and a common stop bit.
Specification