Title:
MULTICAST AND BROADCAST SERVICES (MBS) MOBILITY WITH SERVICE CONTINUITY IN CONNECTED STATE
Document Type and Number:
WIPO Patent Application WO/2022/087963
Kind Code:
A1
Abstract:
Techniques are described for improving service continuity for Multicast and Broadcast Services (MBS) communications during handover. Techniques are included for supporting lossless handover and data forwarding during handover for peer-to-multiple (PTM) MBS transmission. Lossless handover may be achieved in part by the user equipment (UE) providing to the target base station an indication of the next packet of the MBS session to be received following an RRC reconfiguration message, and an indication of any MBS packets provided by the source base station prior to the RRC reconfiguration message that were not properly received by the UE. Data forwarding may be performed from the source base station to the target base station if the MBS session was not configured on the target base station prior to the handover. Data forwarding may be omitted if the MBS session was configured on the target base station prior to the handover.
Inventors:
XU FANGLI (CN)
HU HAIJING (CN)
PALLE VENKATA NAVEEN KUMAR R (US)
ROSSBACH RALF (DE)
VANGALA SARMA V (US)
GURUMOORTHY SETHURAMAN (US)
NIMMALA SRINIVASAN (US)
VAMANAN SUDEEP MANITHARA (DE)
CHEN YUQIN (CN)
HU HAIJING (CN)
PALLE VENKATA NAVEEN KUMAR R (US)
ROSSBACH RALF (DE)
VANGALA SARMA V (US)
GURUMOORTHY SETHURAMAN (US)
NIMMALA SRINIVASAN (US)
VAMANAN SUDEEP MANITHARA (DE)
CHEN YUQIN (CN)
Application Number:
PCT/CN2020/124829
Publication Date:
May 05, 2022
Filing Date:
October 29, 2020
Export Citation:
Assignee:
APPLE INC (US)
XU FANGLI (CN)
XU FANGLI (CN)
International Classes:
H04W4/06; H04W36/24
Domestic Patent References:
| WO2011079478A1 | 2011-07-07 |
Foreign References:
| CN101291462A | 2008-10-22 | |||
| CN108781387A | 2018-11-09 |
Other References:
ZTE: "Consideration on lossless handover for NR MBS", 3GPP DRAFT; R3-206532, vol. RAN WG3, no. Online; 20201102 - 20201112, 23 October 2020 (2020-10-23), XP051945929
ZTE, SANECHIPS: "Consideration on lossless handover for NR MBS", 3GPP DRAFT; R2-2009743, vol. RAN WG2, no. electronic; 20201102 - 20201113, 23 October 2020 (2020-10-23), XP051942600
See also references of EP 4218269A4
ZTE, SANECHIPS: "Consideration on lossless handover for NR MBS", 3GPP DRAFT; R2-2009743, vol. RAN WG2, no. electronic; 20201102 - 20201113, 23 October 2020 (2020-10-23), XP051942600
See also references of EP 4218269A4
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (CN)
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