Method of reducing delay

• US 20070123284A1
• Filed: 12/22/2003
• Published: 05/31/2007
• Est. Priority Date: 05/13/2003
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Christoffersson, Jan, Hannu, Hans, Jonsson, Tomas, Schliwa-Bertling, Paul
• Granted Patent: US 7,873,378 B2
• Time in Patent Office: Days
• US Class Current: 455/518
• CPC Class Codes: H04B 17/373 Predicting channel quality or other radio frequency [RF] parameters
• CPC Class Codes: H04W 28/26 Resource reservation
• CPC Class Codes: H04W 4/10 Push-to-Talk [PTT] or Push-On-Call services
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 76/45 for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services

Abstract

The present invention relates to a method of reducing setup delay for an uplink message from a user terminal (UT) in a delay sensitive service in a radio telecommunications system, such as a push to talk service (PoC), by predicting that delay sensitive data is about to be transmitted, sending, as a response to the prediction, a connection setup signal from the terminal to a basestation subsystem (BSS) in order to set up an early uplink radio connection, and transmitting the delay sensitive data via the early uplink connection. There is also provided a user terminal (UT) and a radio telecommunications system.

Claims

1. Method of reducing setup delay for an uplink message from a user terminal (UT) in a delay sensitive service in a radio telecommunications system characterized by

predicting that delay sensitive data is to be transmitted,

sending, in response to the prediction, a connection setup signal from the terminal to a basestation subsystem (BSS) in order to set up an early uplink radio connection, and

transmitting the delay sensitive data over the early uplink connection.

2. Method according to claim 1 characterized in that the delay sensitive service is a push to talk service (PoC), and the delay sensitive data is PoC data.

3. Method according to claim 2 characterized in that the step of predicting comprises recognition that a user takes a first action to send a PoC message to another user or a group of users.

4. Method according to claim 3 characterized in that the first action involves selecting receivers in a PoC contacts list.

5. Method according to claim 2 characterized in that the step of predicting comprises recognition of the reception of a PoC response signal allowing the user to transmit a PoC message.

6. Method according to claim 2 characterized in that the step of predicting comprises recognition of the reception of a PoC request signal indicating that a PoC message is addressed to the terminal.

7. Method according to claim 2 characterized in that the step of predicting comprises estimation of the end of a received PoC message.

8. Method according to claim 2 characterized in that the step of predicting comprises estimation of the probability that the user will reply to a received PoC message in each specific situation, the estimation of the reply probability being based on parameters selected from the group:

originating user, numbers of users in a group message, time of day, other settings in the UT, position, a user activity factor.

9. Method according to claim 2 characterized in that the connection setup signal is a signal that causes minimal load on the telecommunications system.

10. Method according to claim 2 characterized in that the connection setup signal in a GSM/GPRS telecommunications system is a RTCP message.

11. Method according to claim 2 characterized in that the connection setup signal in a GSM/GPRS telecommunications system is a RTP packet.

12. Method according to claim 11 characterized in that the RTP payload table of context field indicates that the RTP packet is a NO_DATA packet.

13. Method according to claim 2 characterized in that the connection setup signal in a GSM/GPRS telecommunications system is a ICMP packet.

14. User terminal (UT) being provided with a push to talk (PoC) function in a radio telecommunications systems, characterized in that the PoC function comprises a setup delay reducing function arranged to predict that delay sensitive PoC data is to be transmitted from the user terminal (UT) and in response to the prediction to trigger the transmission of a connection setup signal from the user terminal to a basestation subsystem (BSS) in order to set up an early uplink radio connection.

15. User terminal according to claim 14 characterized in that the setup delay reducing function is arranged to predict that data is to be transmitted from the user terminal according to the method of claim 2.

16. User terminal according to claim 14 characterized in that the connection setup signal is a signal according to claim 8.

17. A radio telecommunications system comprising a push to talk (PoC) service, and at least one user terminal provided with a push to talk (PoC) function, characterized in that the PoC function comprises a setup delay reducing function arranged to predict that delay sensitive PoC data is to be transmitted from the user terminal, and in response to the prediction to trigger the transmission of a connection setup signal from the user terminal to a basestation subsystem (BSS) in order to set up an early uplink radio connection.