Process for transmitting data, in particular GSM data
First Claim
Patent Images
1. A method of transmitting data between a calling subscriber and a called subscriber, using a predetermined frame format, comprising the steps of:
- subdividing a data stream between a first transcoder assigned to the calling subscriber and a second transcoder assigned to the called subscriber into a first data stream with samples for transmission and a second data stream with signal parameters for at least one of reconstructing user data and signaling, wherein the signal parameters are provided for transparent switching; and
simultaneously transmitting the first and second data streams as a function of predetermined operating conditions;
wherein the data is GSM data.
8 Assignments
0 Petitions
Accused Products
Abstract
A data stream between transcoders of a mobile wireless system is subdivided into a first data stream with samples for transmission and a second data stream with signal parameters for reconstruction of user data and/or for signaling. Both data streams are transmitted at the same time permitting an improvement in the quality of transmitted data, e.g. speech data in a GSM network in tandem operation between mobile subscribers.
-
Citations
22 Claims
-
1. A method of transmitting data between a calling subscriber and a called subscriber, using a predetermined frame format, comprising the steps of:
-
subdividing a data stream between a first transcoder assigned to the calling subscriber and a second transcoder assigned to the called subscriber into a first data stream with samples for transmission and a second data stream with signal parameters for at least one of reconstructing user data and signaling, wherein the signal parameters are provided for transparent switching; and
simultaneously transmitting the first and second data streams as a function of predetermined operating conditions;
wherein the data is GSM data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
transmitting only the samples during the handshake phase; and
inserting zero sequences instead of the signal parameters.
-
-
9. The method according to claim 7, further comprising the step of switching the second transcoder assigned to the called subscriber to a tandem-free operation after receiving the identification information from the first transcoder assigned to the calling subscriber.
-
10. The method according to claim 7, further comprising the step of transmitting a periodic idle pattern instead of the samples after switching to a tandem-free operation.
-
11. A method of transmitting data between a calling subscriber and a called subscriber, using a predetermined frame format, comprising the steps of:
-
subdividing a data stream between a first transcoder assigned to the calling subscriber and a second transcoder assigned to the called subscriber into a first data stream with samples for transmission and a second data stream with signal parameters for at least one of reconstructing user data and signaling, wherein the signal parameters are provided for transparent switching;
simultaneously transmitting the first and second data streams as a function of predetermined operating conditions, wherein the data is GSM data; and
transmitting identification information instead of the signal parameters for a predetermined period of time during a handshake phase between the calling subscriber and the called subscriber, wherein the step of transmitting identification information includes, transmitting only samples during the handshake phase, and inserting zero sequences instead of the signal parameters, wherein the zero sequences are inserted before the identification information.
-
-
12. A method of transmitting data between a calling subscriber and a called subscriber, using a predetermined frame format, comprising the steps of:
-
subdividing a data stream between a first transcoder assigned to the calling subscriber and a second transcoder assigned to the called subscriber into a first data stream with samples for transmission and a second data stream with signal parameters for at least one of reconstructing user data and signaling, wherein the signal parameters are provided for transparent switching;
simultaneously transmitting the first and second data streams as a function of predetermined operating conditions, wherein the data is GSM data; and
transmitting identification information instead of the signal parameters for a predetermined period of time during a handshake phase between the calling subscriber and the called subscriber, wherein the signal parameters are transmitted in a transcoding rate adaption unit frame immediately after transmitting the identification information.
-
-
13. A method of transmitting data between a calling subscriber and a called subscriber, using a predetermined frame format, comprising the steps of:
-
subdividing a data stream between a first transcoder assigned to the calling subscriber and a second transcoder assigned to the called subscriber into a first data stream with samples for transmission and a second data stream with signal parameters for at least one of reconstructing user data and signaling, wherein the signal parameters are provided for transparent switching;
simultaneously transmitting the first and second data streams as a function of predetermined operating conditions, wherein the data is GSM data;
transmitting identification information instead of the signal parameters for a predetermined period of time during a handshake phase between the calling subscriber and the called subscriber;
transmitting a periodic idle pattern instead of the samples after switching to a tandem-free operation; and
recording one of a termination of a connection and a transmission error by one of detecting transcoding rate adaption unit frame synchronization information and monitoring the periodic idle pattern. - View Dependent Claims (17, 18, 19)
replacing a faulty transcoding rate adaption unit frame with a previously transmitted transcoding rate adaptation unit frame using a remote station; and
initiating a muting function.
-
-
18. The method according to claim 13, further comprising the steps of:
-
setting a counter when terminating the connection;
maintaining the tandem-free operation if new identification information is received from a third transcoder within a predetermined counting period;
transmitting the identification information if the new identification information is not received; and
terminating the tandem-free operation in the absence of a synchronization.
-
-
19. The method according to claim 13, further comprising the steps of:
-
temporarily storing last-transmitted data; and
replacing any defective data with the temporarily stored data for an error masking.
-
-
14. A method of transmitting data between a calling subscriber and a called subscriber, using a predetermined frame format, comprising the steps of:
-
subdividing a data stream between a first transcoder assigned to the calling subscriber and a second transcoder assigned to the called subscriber into a first data stream with samples for transmission and a second data stream with signal parameters for at least one of reconstructing user data and signaling, wherein the signal parameters are provided for transparent switching, and wherein the signal parameters of the second data stream are transcoding rate adaption unit frames for mobile wireless systems;
simultaneously transmitting the first and second data streams as a function of predetermined operating conditions, wherein the data is GSM data; and
recording one of a termination of a connection or a transmission error by one of detecting one of a transcoding rate adaption unit frame synchronization and analyzing a periodic pattern. - View Dependent Claims (15)
-
-
16. A method of transmitting data between a calling subscriber and a called subscriber, using a predetermined frame format, comprising the steps of:
-
subdividing a data stream between a first transcoder assigned to the calling subscriber and a second transcoder assigned to the called subscriber into a first data stream with samples for transmission and a second data stream with signal parameters for at least one of reconstructing user data and signaling, wherein the signal parameters are provided for transparent switching;
simultaneously transmitting the first and second data streams as a function of predetermined operating conditions, wherein the data is GSM data;
transmitting identification information instead of the signal parameters for a predetermined period of time during a handshake phase between the calling subscriber and the called subscriber;
transmitting a periodic idle pattern instead of the samples after switching to a tandem-free operation;
monitoring the second data stream during the handshake phase to determine if non-zero sequences are arriving;
deriving a trigger signal from the monitoring using switching equipment located between the first and second transcoders;
sending the periodic idle pattern using the switching equipment when one of the first transcoder and second transcoder are not busy;
switching a loop in the handshake phase using the switching equipment, between an input and an output of a line to the one of the first transcoder and the second transcoder before the switching equipment switches data through to the one of the first transcoder and the second transcoder; and
compensating with the trigger signal if the switching equipment switches the data through at different rates in an input direction and an output direction.
-
-
20. A method of transmitting data between a calling subscriber and a called subscriber, using a predetermined frame format, comprising the steps of:
-
subdividing a data stream between a first transcoder assigned to the calling subscriber and a second transcoder assigned to the called subscriber into a first data stream with samples for transmission and a second data stream with signal parameters for at least one of reconstructing user data and signaling, wherein the signal parameters are provided for transparent switching;
simultaneously transmitting the first and second data streams as a function of predetermined operating conditions, wherein the data is GSM data; and
transmitting identification information instead of the signal parameters for a predetermined period of time during a handshake phase between the calling subscriber and the called subscriber, wherein the step of transmitting identification information includes transmitting only samples during the handshake phase instead of transmitting both samples and signal parameters simultaneously.
-
-
21. A method of transmitting data between a calling subscriber and a called subscriber, using a predetermined frame format, comprising the steps of:
-
subdividing a data stream between a first transcoder assigned to the calling subscriber and a second transcoder assigned to the called subscriber into a first data stream with samples for transmission and a second data stream with signal parameters for at least one of reconstructing user data and signaling, wherein the signal parameters are provided for transparent switching;
simultaneously transmitting the first and second data streams as a function of predetermined operating conditions, wherein the data is GSM data; and
transmitting identification information instead of the signal parameters for a predetermined period of time during a handshake phase between the calling subscriber and the called subscriber, wherein the signal parameters are transmitted in a transcoding rate adaption unit frame.
-
-
22. A method of transmitting data between a calling subscriber and a called subscriber, using a predetermined frame format, comprising the steps of:
-
subdividing a data stream between a first transcoder assigned to the calling subscriber and a second transcoder assigned to the called subscriber into a first data stream with samples of speech data for transmission and a second data stream with signal parameters for reconstructing the speech data, wherein the signal parameters are provided for transparent switching; and
simultaneously transmitting the first and second data streams as a function of predetermined operating conditions.
-
Specification