公开(公告)号：US09055560B2

公开(公告)日：2015-06-09

申请号：US13743644

申请日：2013-01-17

Applicant: MEDIATEK, INC.

Inventor： Per Johan Mikael Johansson ,  Yih-Shen Chen ,  Tze-Ping Low ,  William Plumb

IPC: H04W76/02 ,  H04W36/08 ,  H04W36/24 ,  H04W36/00

CPC classification number: H04W76/19 ,  H04W36/0033 ,  H04W36/0055 ,  H04W36/0061 ,  H04W36/0072 ,  H04W36/08 ,  H04W36/24 ,  H04W40/36 ,  H04W48/17 ,  H04W76/18

Abstract: An enhanced connection recovery upon lost RRC connection due to radio link failure (RLF) or handover failure (HOF) is proposed. A UE first establishes an RRC connection in a source cell in a mobile communication network. Later on, the UE detects a failure event and starts an RRC reestablishment procedure in a target cell to restore the RRC connection. In a first novel aspect, a fast NAS recovery process is applied to reduce the outage time in the target cell. In a second novel aspect, context fetching is used to reduce the outage time in the target cell. In a third novel aspect, a loss-less reestablishment procedure is proposed to reduce data loss during the connection recovery.

Abstract translation: 提出了由于无线链路故障（RLF）或切换失败（HOF）引起的丢失的RRC连接的增强的连接恢复。 UE首先在移动通信网络中的源小区中建立RRC连接。 之后，UE检测故障事件，并在目标小区中开始RRC重建过程，以恢复RRC连接。 在第一个新颖的方面，应用快速的NAS恢复过程来减少目标小区中的停电时间。 在第二个新颖的方面，使用上下文获取来减少目标小区中的停机时间。 在第三个新颖的方面，提出了一种无损重建过程，以减少连接恢复期间的数据丢失。

公开(公告)号：US20130260745A1

公开(公告)日：2013-10-03

申请号：US13688124

申请日：2012-11-28

Applicant: MEDIATEK, INC.

Inventor： Per Johan Mikael Johansson ,  Shiang-Jiun Lin ,  Yih-Shen Chen ,  William Plumb

IPC: H04W24/02

CPC classification number: H04W24/02 ,  H04L41/0631 ,  H04L41/0686 ,  H04W24/04 ,  H04W36/00 ,  H04W36/14 ,  H04W36/36 ,  H04W76/19

Abstract: A method of inter-RAT failure event report is proposed. A UE detects a failure event in a first cell served by a first base station, and the first cell belongs to a first RAT. The failure event may include a radio link failure or a handover failure. The UE then performs an RRC establishment procedure with a second cell served by a second base station, and the second cell belongs to a second RAT. After the RRC establishment, the UE transmits a failure event report to the wireless network. The failure event can be a radio link failure, or be associated with a mobility command such as a handover command. By providing more reliable information in the failure event report than a network solution could provide, inter-RAT mobility performance can be improved.

Abstract translation: 提出了一种RAT间故障事件报告的方法。 UE检测由第一基站服务的第一小区中的故障事件，并且第一小区属于第一RAT。 故障事件可能包括无线电链路故障或切换失败。 然后，UE由第二基站服务的第二小区执行RRC建立过程，并且第二小区属于第二RAT。 在RRC建立之后，UE向无线网络发送故障事件报告。 故障事件可以是无线电链路故障，或者与诸如切换命令的移动性命令相关联。 通过在故障事件报告中提供比网络解决方案可以提供更可靠的信息，可以提高RAT间移动性能。

公开(公告)号：US20130183974A1

公开(公告)日：2013-07-18

申请号：US13743612

申请日：2013-01-17

Applicant: Mediatek, Inc.

Inventor： Per Johan Mikael Johansson ,  Yih-Shen Chen ,  Tze-Ping Low ,  William Plumb

IPC: H04W36/24

CPC classification number: H04W76/19 ,  H04W36/0033 ,  H04W36/0055 ,  H04W36/0061 ,  H04W36/0072 ,  H04W36/08 ,  H04W36/24 ,  H04W40/36 ,  H04W48/17 ,  H04W76/18

Abstract: An enhanced connection recovery upon lost RRC connection due to radio link failure (RLF) or handover failure (HOF) is proposed. A UE first establishes an RRC connection in a source cell in a mobile communication network. Later on, the UE detects a failure event and starts an RRC reestablishment procedure in a target cell to restore the RRC connection. In a first novel aspect, a fast RLF process is applied to reduce the outage time in the serving cell. In a second novel aspect, an enhanced cell selection mechanism based on cell prioritization information is applied to reduce the outage time in the target cell. In one embodiment, multi-RAT registration is used to steer cell selection.