公开(公告)号：EP2422544A1

公开(公告)日：2012-02-29

申请号：EP10766659.6

申请日：2010-04-23

申请人： MediaTek Inc. ,  Liao, Wan-Jiun

发明人： LIAO, Wan-Jiun ,  LU, Hsiao-Chen ,  TANG, Chih-Hsiang ,  LIN, Sheng-Wei ,  FU, I-Kang ,  CHOU, Chao-Chin

IPC分类号： H04W36/00

CPC分类号： H04W36/0072

摘要： Carrier pre-assignment is applied in multi-carrier handover operation to mitigate the impact to the user experience during handover and to achieve various objectives of call admission control in wireless multi-carrier OFDM networks. With carrier pre-assignment, a mobile station communicates its multi-carrier information to a target base station. The target base station pre-assigns secondary carriers to fulfill the requirements of the mobile station. In a first embodiment, a break-before-entry (BBE) multi-carrier handover procedure with carrier pre-assignment is provided. In a second embodiment, an entry-before-break (EBB) multi- carrier handover procedures for both inter-FA and intra-FA with carrier pre-assignment are provided. The multi-carrier handover procedures with carrier pre-assignment may be applied to 2-to-2 or N-to-N carriers handover situation. Because target secondary carriers are pre- assigned before handoff, the mobile station is ready for data transmission over multiple carriers after handover without additional carrier assignment procedure.

公开(公告)号：EP3407557A1

公开(公告)日：2018-11-28

申请号：EP18178352.3

申请日：2010-12-30

申请人： MediaTek Inc.

发明人： CHOU, Chao-Chin ,  FU, I-Kang

IPC分类号： H04L27/26 ,  H04B17/318 ,  H04W72/08

CPC分类号： H04L27/2601 ,  H04B17/318 ,  H04B17/336 ,  H04B17/373 ,  H04B17/382 ,  H04W72/085

摘要： In a wireless OFDM multi-carrier communication system, a mobile station obtains measurement result of a first received signal strength indication (RSSI) of a first preamble signal transmitted from a base station over a first radio frequency (RF) carrier. The mobile station also obtains signal offset information between the first RF carrier and a second RF carrier of the base station. In response to the measurement result and the signal offset information, the mobile station estimates a second RSSI of a second preamble signal transmitted by the base station over the second RF carrier without performing scanning over the second RF carrier. In one novel aspect, the mobile station identifies a carrier group containing multiple carriers that belong to the same base station. Measurement optimization, initial cell selection and cell reselection optimization, report reduction, and other carrier group based optimization can be achieved in the multi-carrier system based on identified carrier group.

公开(公告)号：EP2583489A1

公开(公告)日：2013-04-24

申请号：EP11795190.5

申请日：2011-06-17

申请人： Mediatek Inc.

发明人： CHOU, Chao-Chin ,  CHEN, Yih-Shen

IPC分类号： H04W24/00

CPC分类号： H04W48/16 ,  H04W84/045

摘要： Various measurement configurations and s-Measure mechanism in multi-carrier OFDMA systems are provided. In one embodiment, a user equipment (UE) measures a first reference signal received power (RSRP) level in a primary serving cell (Pcell) over a primary component carrier (PCC). The UE also measures a second RSRP level in a secondary serving cell (Scell) over a secondary component carrier (SCC). The UE compares the first RSRP level with a first s-Measure value and compares the second RSRP level with a second s-Measure value. The UE then enables s- Measure mechanism and stops measuring neighbor cells over the PCC if the first RSRP level is higher than the first s-Measure value. The UE also enables s-Measure mechanism and stops measuring neighbor cells over the SCC if the second RSRP level is higher than the second s- Measure value. By having independent s-Measure mechanism and independent s-Measure value, maximum flexibility is achieved.

公开(公告)号：EP2749121B1

公开(公告)日：2018-06-27

申请号：EP12834335.7

申请日：2012-09-21

申请人： MediaTek Inc. ,  Liao, Wan-Jiun

发明人： LIAO, Wan-Jiun ,  YEH, Shu-Hao ,  LIN, Kuo-Wei ,  CHIANG, Po-Han ,  CHOU, Chao-Chin

IPC分类号： H04W36/00

CPC分类号： H04W36/0038 ,  H04W28/0263 ,  H04W36/0027 ,  H04W76/22 ,  H04W88/16

摘要： A method to realize IP flow mobility (IFOM) between 3GPP access and non-3GPP access over GTP based interfaces is proposed. A user equipment is connected to a PDN-GW via a 3GPP access network and a non-3GPP access network. The UE transmits an IFOM triggering message to the PDN-GW, which selects IP flows to be moved based on EPS bearer ID and IP flow description. The PDN-GW sends an Update Bearer Request to a WAG or ePDG, and updates its mapping table if the Update Bearer Request is successful. The UE also updates its mapping table upon receiving an IFOM acknowledgement from the WAG or ePDG. The PDN-GW initiates a 3GPP bearer modification procedure to move the selected IP flows.

公开(公告)号：EP3220690A1

公开(公告)日：2017-09-20

申请号：EP17163929.7

申请日：2011-03-14

申请人： MediaTek Inc.

发明人： FU, I-Kang ,  CHOU, Chao-Chin

IPC分类号： H04W48/10 ,  H04W52/02 ,  H04W84/12 ,  H04W88/06 ,  H04W48/16 ,  H04W36/22

CPC分类号： H04W36/22 ,  H04W12/04 ,  H04W12/06 ,  H04W48/08 ,  H04W48/10 ,  H04W48/16 ,  H04W52/0274 ,  H04W84/12 ,  H04W88/06 ,  Y02D70/00 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164

摘要： A method of multi-radio interworking to provide integrated cellular and WLAN access for a multi-radio device is provided. A serving base station in a cellular network first obtains wireless local area network (WLAN) information and then forward the WLAN information to a serving device such that the serving device is capable to connect with both the cellular network and a WLAN. The WLAN information may comprise scanning information, WLAN QoS information, WLAN layer-3 information, or additional WLAN access point information. The WLAN information is forwarded based on triggering events associated with the serving base station information, WLAN coverage information, or the serving device information. Based on the received WLAN information, when entering WLAN coverage, the serving device activates its WLAN access to forward traffic from the cellular access network to the WLAN access network. When leaving WLAN coverage, the serving device deactivates its WLAN access to save power consumption.

摘要翻译： 提供了一种多无线电互通的方法来为多无线电设备提供集成蜂窝和WLAN接入。 蜂窝网络中的服务基站首先获得无线局域网（WLAN）信息，然后将WLAN信息转发到服务设备，使得服务设备能够与蜂窝网络和WLAN两者连接。 WLAN信息可以包括扫描信息，WLAN QoS信息，WLAN第3层信息或附加WLAN接入点信息。 基于与服务基站信息，WLAN覆盖范围信息或服务设备信息相关联的触发事件来转发WLAN信息。 基于接收到的WLAN信息，当进入WLAN覆盖范围时，服务设备激活其WLAN接入以将业务从蜂窝接入网络转发到WLAN接入网络。 当离开WLAN覆盖时，服务设备停用其WLAN访问以节省功耗。

公开(公告)号：EP2596672A1

公开(公告)日：2013-05-29

申请号：EP12807692.4

申请日：2012-07-05

申请人： MediaTek, Inc

发明人： CHEN, Yih-Shen ,  CHOU, Chao-Chin ,  HSU, Chia-Chun

IPC分类号： H04W76/02

CPC分类号： H04W36/26 ,  H04W36/0066 ,  H04W48/02 ,  H04W48/08 ,  H04W76/11 ,  H04W76/19

摘要： A method of providing Local IP Access (LIPA) indication is proposed. In one novel aspect, an enhanced cell selection method is proposed using LIPA capability information. Based on LIPA capability related information, a UE is able to prioritize LIPA-capable cells and establish a corresponding packet data network (PDN) connection accordingly. In one embodiment, LIPA information is informed to the UE via Non Access Stratum (NAS) signaling. The UE stores LIPA capability information when receiving a NAS message from a mobility management entity (MME). Later on, when the UE performs cell selection or reselection in idle mode, the UE can use the stored LIPA capability information to prioritize LIPA-capable cells.

公开(公告)号：EP2491693B1

公开(公告)日：2018-08-08

申请号：EP10840598.6

申请日：2010-12-30

申请人： MediaTek Inc.

发明人： CHOU, Chao-Chin ,  FU, I-Kang

IPC分类号： H04L27/26 ,  H04B17/318 ,  H04W72/08

CPC分类号： H04L27/2601 ,  H04B17/318 ,  H04B17/336 ,  H04B17/373 ,  H04B17/382 ,  H04W72/085

摘要： In a wireless OFDM multi-carrier communication system, a mobile station obtains measurement result of a first received signal strength indication (RSSI) of a first preamble signal transmitted from a base station over a first radio frequency (RF) carrier. The mobile station also obtains signal offset information between the first RF carrier and a second RF carrier of the base station. In response to the measurement result and the signal offset information, the mobile station estimates a second RSSI of a second preamble signal transmitted by the base station over the second RF carrier without performing scanning over the second RF carrier. In one novel aspect, the mobile station identifies a carrier group containing multiple carriers that belong to the same base station. Measurement optimization, initial cell selection and cell reselection optimization, report reduction, and other carrier group based optimization can be achieved in the multi-carrier system based on identified carrier group.

公开(公告)号：EP2596671A1

公开(公告)日：2013-05-29

申请号：EP12807425.9

申请日：2012-07-05

申请人： MediaTek, Inc

发明人： CHEN, Yih-Shen ,  CHOU, Chao-Chin ,  HSU, Chia-Chun

IPC分类号： H04W76/02

CPC分类号： H04W76/12 ,  H04W8/245 ,  H04W48/12 ,  H04W88/06

摘要： A method of providing Local IP Access (LIPA) indication is proposed. In one novel aspect, an enhanced cell selection method is proposed using LIPA capability information. Based on LIPA capability related information, a UE is able to prioritize LIPA-capable cells and establish a corresponding packet data network (PDN) connection accordingly. In a first embodiment, LIPA information is statically configured in the UE. In a second embodiment, LIPA information is informed to the UE via broadcasting or unicasting Radio Resource Control (RRC) signaling.

公开(公告)号：EP2266366A1

公开(公告)日：2010-12-29

申请号：EP09834101.9

申请日：2009-12-22

申请人： MediaTek, Inc

发明人： FU, I-Kang ,  CHOU, Chao-Chin ,  CHEN, Yih-Shen

IPC分类号： H04W88/00

CPC分类号： H04W24/02 ,  H04W16/32 ,  H04W36/22 ,  H04W36/38 ,  H04W84/045

摘要： A Femto Base Station (FBS) includes a communication functionality and a reliability functionality. A control entity within the reliability functionality detects an FBS reliability compromising event (for example, an unscheduled loss of external power to the FBS). As a result of detecting the FBS reliability compromising event, the control entity sends a message (an "FBS Reliability Compromising Event Compensation Message" or "FBSRCECM") to the communication functionality. The FBSRCECM initiates an action that compensates for the FBS reliability compromising event. In many examples, the action is the initiating of a handover from the FBS to another base station. The reliability functionality typically includes a rechargeable battery that powers the FBS for a time until the handover is completed gracefully. By performing a graceful handover, cellular network reliability is improved as compared to situations in which a conventional FBS simply stops working and connections handled by the conventional FBS are broken.

公开(公告)号：EP2596672B1

公开(公告)日：2018-01-31

申请号：EP12807692.4

申请日：2012-07-05

申请人： MediaTek Inc.

发明人： CHEN, Yih-Shen ,  CHOU, Chao-Chin ,  HSU, Chia-Chun

IPC分类号： H04W36/00 ,  H04W48/08

CPC分类号： H04W36/26 ,  H04W36/0066 ,  H04W48/02 ,  H04W48/08 ,  H04W76/11 ,  H04W76/19

摘要： A method of providing Local IP Access (LIPA) indication is proposed. In one novel aspect, an enhanced cell selection method is proposed using LIPA capability information. Based on LIPA capability related information, a UE is able to prioritize LIPA-capable cells and establish a corresponding packet data network (PDN) connection accordingly. In one embodiment, LIPA information is informed to the UE via Non Access Stratum (NAS) signaling. The UE stores LIPA capability information when receiving a NAS message from a mobility management entity (MME). Later on, when the UE performs cell selection or reselection in idle mode, the UE can use the stored LIPA capability information to prioritize LIPA-capable cells.