Frame synchronisation in a radio access network

Details Frame synchronisation in a radio access network Frame synchronisation in a radio access network

2003-11-24

2009-12-01

Pérez-Gutiérrez, Rafael (Department: 2617)

Multiplex communications

Communication over free space

Combining or distributing information via time channels

C455S018000

Reexamination Certificate

active

07626974

ABSTRACT:
A method of optimizing the timing offsets with which data frames are transmitted over the Iur/Iub interfaces of a UMTS Terrestrial Radio Access Network, UTRAN. The method comprises, for a given Iur/Iub interface or set of Iur/Iub interfaces over which identical user plane data is to be sent, defining a duration of a data frame receiving window for use by the receiving node(s), transmitting data frames from a sending node with an initial timing offset sufficient to ensure a likelihood that the frames will be received at the or each receiving node within the defined receiving window, reducing the timing offset at the sending node in a stepwise manner, and adjusting the timing offset at the sending node in response to the receipt of late Time of Arrival error reports at the sending node. In a second embodiment, the frame synchronisation of frames corresponding to speech services and data services is carried out by delaying the frames corresponding to speech services a fixed delay and the frames corresponding to data services a variable delay based on a received time of arrival feedback.

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“Universal Mobile Telecommunications System (UMTS); Synchronisation in UTRAN; Stage 2 (3GPP TS 25.402 version 5.2.0 Release 5); ETSI TS 125 402”, ETSI Standards, European Telecommunications Standards Institute, 'Online!, vol. 3-R3, No. V520, Jun. 2003, XP014008867.
3GPP TS 25.402 v5.2.0, 3rdGeneration Partnership Project; Technical Specification Group Radio Access Network; Synchronisation in UTRAN Stage 2 (Release 5) (Jun. 2003), pp. 1-47.

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