公开(公告)号：US20180332532A1

公开(公告)日：2018-11-15

申请号：US15977096

申请日：2018-05-11

Applicant: MEDIATEK INC.

Inventor： Per Johan Mikael Johansson ,  Li-Chuan Tseng

IPC: H04W52/02 ,  H04W24/10 ,  H04W24/02 ,  H04W36/32 ,  H04W76/28 ,  H04W68/02 ,  H04W76/27 ,  H04W76/30

CPC classification number: H04W52/0209 ,  H04W24/02 ,  H04W24/10 ,  H04W36/32 ,  H04W68/02 ,  H04W76/27 ,  H04W76/28 ,  H04W76/30

Abstract: Novel UE operation modes are proposed to improve the power consumption for potentially less mobile UEs, both for stationary UEs, almost stationary UEs, and limited mobility UEs by optimizing neighbor cell measurements and/or by optimizing UE wakeup sequence. Optimized neighbor cell measurements mean that the procedure can be done less frequently or not at all during certain conditions. Optimized wakeup sequence (with less wakeup time) mainly affect paging performance via UE implementations. It is an object of the current invention to allow UE to be aware of its mobility states, via either explicit configuration or self-estimation, and adjust its wakeup and measurement behaviors accordingly. Also, some UEs are allowed to switch among different mobility states, while other UEs are fixed in a given mobility state.

公开(公告)号：US09854496B2

公开(公告)日：2017-12-26

申请号：US15240083

申请日：2016-08-18

Applicant: MEDIATEK INC.

Inventor： Per Johan Mikael Johansson ,  Li-Chuan Tseng ,  Chia-Chun Hsu

IPC: H04W36/00 ,  H04W36/30 ,  H04W76/04 ,  H04W36/38 ,  H04W36/36

CPC classification number: H04W36/30 ,  H04W36/36 ,  H04W36/38 ,  H04W76/28

Abstract: A novel and efficient connected mode cell reselection procedure is proposed to improve the mobility performance for user equipments (UEs) configured with extended connected mode Discontinuous Reception (DRX) cycle in LTE systems. A UE-centric mobility mechanism with which a UE performs cell reselection in RRC connected mode is proposed. The UE is allowed to select a target cell without handover signaling in the source cell and when needed to initiate signaling with the target cell, for which signal quality is much better. In this way, handover failures due to failed signaling in the source cell can be avoided. More specifically, the proposed mobility mechanism reduces signaling overhead and is inherently robust towards different DRX cycle settings, i.e., longer DRX cycles do not cause more failures, or more overhead, or more battery consumption.

公开(公告)号：US20170238284A1

公开(公告)日：2017-08-17

申请号：US15423982

申请日：2017-02-03

Applicant: MEDIATEK INC.

Inventor： Li-Chuan Tseng ,  Per Johan Mikael Johansson ,  Yih-Shen Chen

IPC: H04W72/04 ,  H04W24/08 ,  H04W76/02 ,  H04W74/08

CPC classification number: H04W72/042 ,  H04L5/001 ,  H04L5/0091 ,  H04L5/0098 ,  H04L67/12 ,  H04W24/08 ,  H04W72/0453 ,  H04W74/0833 ,  H04W74/0866

Abstract: A novel and efficient multi-carrier operation mechanism is proposed to maintain the capacity and reliability for NB-IOT systems. First, the functional separation on anchor NB-IOT carrier and data NB-IOT carriers is defined. Transportation of system broadcast information, including synchronization signal (NB-PSS/NB-SSS) and NB-MIB (NB-PBCH) and paging are on anchor carrier, RACH procedure and Data transmission and reception are on data carrier. Second, UE switching between anchor and data carriers. UE on anchor carrier switches to data carrier via paging, RRC signaling or cross-carrier scheduling. On the other hand, UE on data carrier switches back to anchor carrier after transmission or reception complete (right-after or after time-out).

公开(公告)号：US20170055192A1

公开(公告)日：2017-02-23

申请号：US15240083

申请日：2016-08-18

Applicant: MEDIATEK INC.

Inventor： Per Johan Mikael Johansson ,  Li-Chuan Tseng ,  Chia-Chun Hsu

IPC: H04W36/08 ,  H04W36/36 ,  H04W36/30 ,  H04W36/38 ,  H04W76/04 ,  H04W36/00

CPC classification number: H04W36/30 ,  H04W36/36 ,  H04W36/38 ,  H04W76/28

Abstract: A novel and efficient connected mode cell reselection procedure is proposed to improve the mobility performance for user equipments (UEs) configured with extended connected mode Discontinuous Reception (DRX) cycle in LTE systems. A UE-centric mobility mechanism with which a UE performs cell reselection in RRC connected mode is proposed. The UE is allowed to select a target cell without handover signaling in the source cell and when needed to initiate signaling with the target cell, for which signal quality is much better. In this way, handover failures due to failed signaling in the source cell can be avoided. More specifically, the proposed mobility mechanism reduces signaling overhead and is inherently robust towards different DRX cycle settings, i.e., longer DRX cycles do not cause more failures, or more overhead, or more battery consumption.

Abstract translation: 提出了一种新颖有效的连接模式小区重选过程，以提高在LTE系统中配置有扩展连接模式不连续接收（DRX）周期的用户设备（UE）的移动性能。 提出了以RRC为中心的移动机制，UE以RRC连接方式进行小区重选。 允许UE在源小区中选择没有切换信令的目标小区，并且当需要与目标小区发起信令时，其信号质量好得多。 以这种方式，可以避免源单元中的信令失败导致的切换失败。 更具体地，所提出的移动性机制降低了信令开销，并且对于不同的DRX周期设置固有地是稳健的，即更长的DRX周期不会引起更多的故障或更多的开销或更多的电池消耗。