Title:
UPLINK SYNCHRONIZATION PROCESSING
Document Type and Number:
WIPO Patent Application WO/2011/087416
Kind Code:
A3
Abstract:
Uplink synchronization of user equipment, UE, (30, 40, 50) served by a radio base station, RBS, (20) is enabled by triggering (re)start of timing alignment, TA, timer (180) in response to a first TA command. Uplink timing of data received from the UE (30, 40, 50) during a measuring time window (63) constituting a defined sub-interval of a time interval (60) of the TA timer (180) is measured and employed for determining a timing advance for the UE (30, 40, 50). Transmission of a second TA command comprising a notification of the timing advance is co-scheduled together with a scheduled downlink data transmission to the UE (30, 40, 50) during a following scheduling time window (65) constituting a defined sub-interval of the time interval (60). The number of TA commands that are scheduled by themselves are minimized to free radio resources and increase the downlink throughput.
Inventors:
LANGEREIS ALEXANDER (SE)
HUSS FREDRIK (SE)
HUSS FREDRIK (SE)
Application Number:
PCT/SE2010/050038
Publication Date:
July 11, 2013
Filing Date:
January 15, 2010
Export Citation:
Assignee:
ERICSSON TELEFON AB L M (SE)
LANGEREIS ALEXANDER (SE)
HUSS FREDRIK (SE)
LANGEREIS ALEXANDER (SE)
HUSS FREDRIK (SE)
International Classes:
H04W56/00
Foreign References:
| US20090111445A1 | 2009-04-30 | |||
| US20090129330A1 | 2009-05-21 |
Other References:
"Technical Specification, 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA), Medium Access Control (MAC) protocol specification (Release 9)", 3GPP TS 36.321 V9.1.0, December 2009 (2009-12-01), pages 1 - 45, XP050401617
MOTOROLA: "Uplink Synchronization Maintenance and Timing Advance", R1-071329, 3GPP TSG RAN1 #48BIS, 26 March 2007 (2007-03-26) - 30 March 2007 (2007-03-30), ST. JULIAN'S, MALTA, pages 1 - 3, XP050105281
SIEMENS AG: "Description of the Timing Advance Mechanism for TDD", TSGR2#6(99)849 TSG-RAN WORKING GROUP 2, 16 August 1999 (1999-08-16) - 20 August 1999 (1999-08-20), SOPHIA-ANTIPOLIS, pages 1 - 5, XP050113158
MOTOROLA: "Uplink Synchronization Maintenance and Timing Advance", R1-071329, 3GPP TSG RAN1 #48BIS, 26 March 2007 (2007-03-26) - 30 March 2007 (2007-03-30), ST. JULIAN'S, MALTA, pages 1 - 3, XP050105281
SIEMENS AG: "Description of the Timing Advance Mechanism for TDD", TSGR2#6(99)849 TSG-RAN WORKING GROUP 2, 16 August 1999 (1999-08-16) - 20 August 1999 (1999-08-20), SOPHIA-ANTIPOLIS, pages 1 - 5, XP050113158
Attorney, Agent or Firm:
AROS PATENT AB (Uppsala, SE)
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