Radio telecommunications system and method of operating the same with reduced delays for data transmission over a radio interface

• US 20040047292A1
• Filed: 06/02/2003
• Published: 03/11/2004
• Est. Priority Date: 04/25/2000
• Status: Active Grant

• Current Assignee: Ericsson AB (Telefonaktiebolaget LM Ericsson)
• Original Assignee: Ericsson AB (Telefonaktiebolaget LM Ericsson)
• Inventors: du Crest, Gilles, Cayla, Stephane
• Granted Patent: US 7,551,580 B2
• Time in Patent Office: Days
• US Class Current: 370/235
• CPC Class Codes: H04L 47/15 in relation to multipoint traffic arrangements for broadcast or multicast in data networks H04L12/18
• CPC Class Codes: H04L 47/70 Admission control; Resource allocation
• CPC Class Codes: H04L 47/72 using reservation actions during connection setup
• CPC Class Codes: H04L 47/788 Autonomous allocation of resources
• CPC Class Codes: H04L 47/808 User-type aware
• CPC Class Codes: H04L 47/824 Applicable to portable or mobile terminals
• CPC Class Codes: H04W 28/26 Resource reservation
• CPC Class Codes: H04W 76/15 Setup of multiple wireless link connections
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]
• CPC Class Codes: H04W 92/10 between terminal device and access point, i.e. wireless air interface

Abstract

A radio telecommunications system and method of operating the same is described which provides a reduce delay for transfer of packet data. Before a data transmission is released in one direction (uplink or downlink) a channel is reserved in the other direction. The channel reservation may be held for a certain period of time, e.g. 5 seconds after which the channel is released. The present invention is particularly useful when there is a large asymmetry in data transfer between uplink and downlink.

Claims

1. A mobile radio telecommunications (RT) network for switching data between user terminals and a data network,

the RT network comprising

a base station system including at least one radio transceiver;

and

at least one data radio traffic channel for communication between the RT network and the user terminals, a data service requiring the setting up of a data traffic channel between a user terminal and the base station system;

wherein when a downlink, respectively an uplink data radio traffic channel is assigned to one of the user terminals;

the RT network is adapted to reserve an uplink, respectively a downlink data radio traffic channel before the release of the assigned downlink, respectively uplink data radio traffic channel, the reserved uplink, respectively downlink radio traffic channel surviving the release of the assigned downlink, respectively uplink traffic channel.

2. The RT network according to claim 1, wherein the one user terminal is adapted to request the reservation of the uplink, respectively downlink data radio traffic channel before the release of the assigned downlink, respectively uplink data radio traffic channel.

3. The RT network according to claim 1 or 2, wherein the at least one data radio traffic channel is capable of accommodating multiple data calls from at least two of the user terminals.

4. The RT network according to claim 1, 2 or 3, wherein a data radio channel request is required to request data service in a transmission direction.

5. The RT network according to any of the claims 2 to 4, wherein the one user terminal is adapted to request reservation of the uplink, respectively downlink data radio channel by in-band signaling.

6. The RT network according to any of claims 3 to 5, wherein accommodating multiple data calls from at least two of the user terminals includes sharing of timeslot in a TDMA system or sharing of a code in a CDMA system.

7. A method of operating a mobile radio telecommunications (RT) network for switching data between user terminals and a data network,

the RT network comprising a base station system including at least one radio transceiver;

and at least one data radio traffic channel for communication between the RT network and the user terminals, a data service requiring the setting up of a data traffic channel between a user terminal and the base station system;

the method comprising the steps of;

assigning a downlink, respectively an uplink data radio traffic channel to one of the user terminals; and

reserving an uplink, respectively a downlink data radio traffic channel before the release of the assigned downlink, respectively uplink data radio traffic channel, the reserved uplink, respectively downlink data radio traffic channel surviving the release of the assigned downlink, respectively uplink data radio traffic channel.

8. The method according to claim 7, wherein the one user terminal requests the reservation of the uplink, respectively downlink data radio traffic channel before the release of the assigned downlink, respectively uplink data radio traffic channel.

9. The method according to claim 7, wherein the RT network automatically reserves the downlink data radio traffic channel, before the release of the assigned uplink data radio traffic channel.

10. The method according to claim 7, 8 or 9, wherein the at least one data radio traffic channel is capable of accommodating multiple data calls from at least two of the user terminals.

11. The method according to any of claims 7 to 10, wherein a data radio channel request is required to request data service in a transmission direction.

12. The method according to any of the claims 7 to 11, wherein the one user terminal is requests reservation of the uplink, respectively downlink data radio channel by in-band signaling.

13. The method according to any of claims 10 to 12, wherein accommodating multiple data calls from at least two of the user terminals includes sharing of timeslot in a TDMA system or sharing of a code in a CDMA system.

14. A network element for use in a mobile radio telecommunications (RT) network for switching data between user terminals and a data network, the RT network comprising:

a base station system including at least one radio transceiver; and

at least one data radio traffic channel for communication between the RT network and the user terminals, a data service requiring the setting up of a data traffic channel between a user terminal and the base station system;

wherein when an uplink, respectively a downlink data radio traffic channel is assigned to one of the user terminals;

the network element is adapted to initiate reservation of a downlink, respectively an uplink data radio channel for the one user terminal before the release of the assigned uplink, respectively downlink data radio traffic channel.

15. The network element according to claim 14, wherein the element is a packet control unit.

16. The network element according to claim 15, wherein the packet control unit is associated with the base station system.

17. A user terminal for use in a mobile radio telecommunications RT) network for switching data between user terminals and a data network,

the RT network comprising

a base station system including at least one radio transceiver;

at least one data radio traffic channel for communication between the RT network and the user terminals, a data service requiring the setting up of a data traffic channel between a user terminal and the base station system; and

wherein when a downlink, respectively an uplink data radio traffic channel is assigned to one of the user terminals;

the one user terminal is adapted to request reservation of an uplink, respectively a downlink data radio channel before the release of the assigned downlink, respectively uplink data radio traffic channel.

18. The user terminal according to claim 17, wherein the user terminal is a mobile terminal.

19. The user terminal according to claim 17 or 18, wherein the user terminal is adapted to request reservation of the uplink, respectively downlink traffic channel by in-band signaling.