(19) United States
(12) Patent Application Publication (io) Pub. No.: US 2004/0248575 Al
Rajala et al. (43) Pub. Date: Dec. 9,2004
(54) HANDOVER METHOD
(76) Inventors: Jussi Rajala, Espoo (FI); Mika Forssell, Espoo (FI); Janne Parantainen, Helsinki (FI)
Correspondence Address:
SQUIRE, SANDERS & DEMPSEY L.L.P.
14TH FLOOR
8000 TOWERS CRESCENT
TYSONS CORNER, VA 22182 (US)
(21) Appl. No.: 10/492,915
(22) PCT Filed: Oct. 16, 2002 (86) PCT No.: PCT/IB02/04264
(30) Foreign Application Priority Data
Oct. 17, 2001 (GB) 0124958.0
Publication Classification
(51) Int. CI.7 I104Q 7 20
(52) U.S. CI 455/436
(57) ABSTRACT
The invention provides a method of handing over user equipment from a source cell to a target cell in a cellular communications network. The cellular communications system comprises a plurality of control units. The method comprises the steps of receiving a message indicating if the operation of the radio link control protocol is to be continued or reset when changing cell, resetting the operation of the radio link control protocol if the message indicates that the current radio link control protocol is to be reset, or continuing the operation of said radio link control protocol if the message indicates that the radio link control protocol is to be continued.
Send assigned resources
for new cell to MS
MS moves to
PDCH - new cell
MS decodes downlink blocks
