公开(公告)号：US09504082B2

公开(公告)日：2016-11-22

申请号：US14709479

申请日：2015-05-12

Applicant: MEDIATEK INC.

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

IPC: H04W76/02 ,  H04W36/08 ,  H04W36/24 ,  H04W48/00 ,  H04W40/36 ,  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.

公开(公告)号：US09398532B2

公开(公告)日：2016-07-19

申请号：US14273886

申请日：2014-05-09

Applicant: MEDIATEK INC.

Inventor： Chia-Chun Hsu ,  Per Johan Mikael Johansson

IPC: H04W52/02 ,  H04W68/02 ,  H04W36/00 ,  H04W48/20 ,  H04W76/04

CPC classification number: H04W52/0225 ,  H04W36/0072 ,  H04W48/20 ,  H04W52/0216 ,  H04W68/02 ,  H04W76/28 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/164 ,  Y02D70/21 ,  Y02D70/24

Abstract: An enhanced paging mechanism is provided for UEs waking up from a very long paging cycle to improve paging robustness and flexibility. Enhanced paging includes absolute time paging (ATP) and paging with extended wakeup time. For absolute time paging, a UE receives ATP configuration and uses the actual wall time to calculate paging occasion if a condition is satisfied. In one embodiment, the wall time is acquired from at least one of an internal UE clock, a GPS time, information broadcasted from the network, or information from a higher layer signaling. For paging with extended wakeup time, a UE applies a long paging cycle followed by multiple normal paging cycles after waking up from the long paging cycle. In one embodiment, the long paging cycle is infinite and the UE enters normal paging cycle only upon TAU-triggered paging or uplink traffic.

Abstract translation: 提供了一种增强的寻呼机制，用于从非常长的寻呼周期唤醒的UE，以提高寻呼的鲁棒性和灵活性。 增强的寻呼包括绝对时间寻呼（ATP）和具有延长唤醒时间的寻呼。 对于绝对时间寻呼，UE接收ATP配置，并且如果满足条件，则使用实际的停留时间来计算寻呼时机。 在一个实施例中，从内部UE时钟，GPS时间，从网络广播的信息或来自较高层信令的信息中的至少一个获取壁时间。 对于具有延长的唤醒时间的寻呼，UE在从长寻呼周期唤醒之后应用长寻呼周期，随后是多个正常寻呼周期。 在一个实施例中，长寻呼周期是无限的，并且UE仅在TAU触发的寻呼或上行链路业务时才进入正常寻呼周期。

公开(公告)号：US09374729B2

公开(公告)日：2016-06-21

申请号：US14859624

申请日：2015-09-21

Applicant: MEDIATEK INC.

Inventor： Per Johan Mikael Johansson ,  Yih-Shen Chen

IPC: H04B5/00 ,  H04B7/00 ,  H04W24/08 ,  H04W24/10 ,  H04W36/00 ,  H04W64/00 ,  H04W72/04 ,  H04W76/02 ,  H04W88/02 ,  H04W88/08

CPC classification number: H04W24/08 ,  H04W24/10 ,  H04W36/0005 ,  H04W64/00 ,  H04W72/0406 ,  H04W76/19 ,  H04W88/02 ,  H04W88/08

Abstract: A method of throughput and data volume measurement for minimization of drive test (MDT) is proposed. A base station establishes a radio resource control (RRC) connection with a user equipment (UE) in a mobile communication network. The base station or UE measures transmitted or received data volume during a transmission time of a data burst between the base station and the UE. When the data burst spans multiple measurement periods and the data burst is split at each measurement period boundary. For each measurement period, data volume during the measurement period is measured to generate a measurement result. When throughput measurement is performed by the network, the base station receives location information that is available during the transmission time of the data burst. The data volume measurement is logged with time stamp such that each measurement result can correlated with the location information.

公开(公告)号：US09344234B2

公开(公告)日：2016-05-17

申请号：US14720932

申请日：2015-05-25

Applicant: MEDIATEK INC.

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

IPC: H04L12/26 ,  H04L5/00 ,  H04W72/08 ,  H04W36/30 ,  H04J11/00 ,  H04W24/02 ,  H04W76/02 ,  H04W36/00

CPC classification number: H04L5/001 ,  H04J11/005 ,  H04L5/006 ,  H04W24/02 ,  H04W36/0083 ,  H04W36/30 ,  H04W72/085 ,  H04W76/15 ,  H04W76/18

Abstract: A method of radio link monitoring (RLM) and radio link failure (RLF) handling over a secondary serving cell (SCELL) is proposed. In a wireless network, a user equipment (UE) establishes a radio resource control (RRC) connection with a base station (eNB). The UE applies carrier aggregation for multiple component carriers (CCs) configured as multiple serving cells. The UE performs radio link monitoring over a primary serving cell (PCELL). The UE also performs radio link monitoring over a secondary serving cell (SCELL). The SCELL belongs to a CC group of one or more CCs, and used as a reference cell for the CC group. When SCELL performance is below pre-defined criteria, the UE and the eNB apply certain actions over the SCELL. The proposed SCELL RLM/RLF handling prevents spurious and uncontrollable uplink SCELL transmission and interference to other UEs.

Abstract translation: 提出了一种在辅助服务小区（SCELL）上的无线电链路监测（RLM）和无线电链路故障（RLF）处理的方法。 在无线网络中，用户设备（UE）建立与基站（eNB）的无线资源控制（RRC）连接。 UE为配置为多个服务小区的多个分量载波（CC）应用载波聚合。 UE在主服务小区（PCELL）上执行无线电链路监视。 UE还在辅助服务小区（SCELL）上执行无线电链路监视。 SCELL属于一个或多个CC的CC组，用作CC组的参考细胞。 当SCELL性能低于预定义标准时，UE和eNB在SCELL上应用某些动作。 所提出的SCELL RLM / RLF处理可防止对其他UE发生杂散和不可控的上行SCELL传输和干扰。

公开(公告)号：US09301186B2

公开(公告)日：2016-03-29

申请号：US14251910

申请日：2014-04-14

Applicant: MEDIATEK INC.

Inventor： Per Johan Mikael Johansson ,  Yih-Shen Chen ,  Chia-Chun Hsu ,  Michael Roberts

IPC: G01R31/08 ,  H04W24/10 ,  H04W24/08

CPC classification number: H04W24/10 ,  H04W24/08 ,  H04W52/14

Abstract: Methods of MDT information logging and reporting are provided. In one embodiment, a method is provided to resolve shortcomings of prior art by correlating UL measurements with QoS information to enable UL performance analysis and accurate detection of coverage problems. In another embodiment, a method is provided to resolve the shortcomings of the prior art by making DL measurements and location information collecting or logging conditional on UL measurements.

Abstract translation: 提供MDT信息记录和报告的方法。 在一个实施例中，提供了一种通过将UL测量与QoS信息相关联来解决现有技术的缺点的方法，以实现UL性能分析和对覆盖问题的准确检测。 在另一个实施例中，提供了一种通过在DL测量中进行DL测量和位置信息收集或记录来解决现有技术的缺点的方法。

公开(公告)号：US09282562B2

公开(公告)日：2016-03-08

申请号：US14621742

申请日：2015-02-13

Applicant: MEDIATEK INC.

Inventor： Chie-Ming Chou ,  Chia-Chun Hsu ,  Yih-Shen Chen ,  Per Johan Mikael Johansson

IPC: H04L12/26 ,  H04W72/04 ,  H04W24/02 ,  H04W24/08 ,  H04W36/26 ,  H04W24/10

CPC classification number: H04W72/0486 ,  H04W24/02 ,  H04W24/08 ,  H04W24/10 ,  H04W36/26

Abstract: A method of collecting and providing traffic statistics in a cellular network in accordance is proposed. A UE establishes an RRC connection with a base station. The UE starts to collect traffic statistics that comprises a CDF curve or a PDF diagram for packet inter-arrival time. The UE may receive a measurement configuration from the base station for the traffic statistics collection. The UE then reports a representation of the traffic statistics to the base station for RRC reconfiguration. The UE may also receive a reporting request from the base station that specifies a representation format. The representation format includes one or more probability values at corresponding inter-arrival time points, at least one slope of the CDF, one or more steep events in the CDF, or a PDF range.

公开(公告)号：US09272851B2

公开(公告)日：2016-03-01

申请号：US13670394

申请日：2012-11-06

Applicant: MEDIATEK, INC.

Inventor： Chien-Hwa Hwang ,  Meng-Ying Tsai ,  Per Johan Mikael Johansson

IPC: B65G51/00 ,  H04W24/10 ,  B05C11/10 ,  H04W24/08 ,  H04W24/02

CPC classification number: B65G51/00 ,  B05C11/1042 ,  B05C11/1047 ,  H04W24/02 ,  H04W24/08 ,  H04W24/10

Abstract: A method of using additional uplink measurements for MDT UL coverage is provided. A base station (eNodeB) establishes a radio resource control (RRC) connection with a user equipment (UE) in a mobile communication network. The eNodeB and the UE are configured for Minimization of Drive Test (MDT). The eNodeB receives a Power Headroom Report (PRH) corresponds to a Physical Uplink Shared Channel (PUSCH) from the UE, and forwards the PHR to an MDT server. The eNodeB performs uplink measurement of a Demodulation Reference Signal (DM-RS) allocated in the PUSCH. The uplink measurement also involves measuring an uplink Received Interference Power (RIP) associated with the PUSCH. The eNodeB then reports uplink measurement results to the MDT server. The MDT server is able to determine uplink coverage based on the PHR and the uplink measurement results.

Abstract translation: 提供了一种使用额外的上行链路测量用于MDT UL覆盖的方法。 基站（eNodeB）在移动通信网络中建立与用户设备（UE）的无线电资源控制（RRC）连接。 eNodeB和UE配置为最小化驱动测试（MDT）。 eNodeB从UE接收对应于物理上行链路共享信道（PUSCH）的功率余量报告（PRH），并将PHR转发到MDT服务器。 eNodeB执行在PUSCH中分配的解调参考信号（DM-RS）的上行链路测量。 上行链路测量还涉及测量与PUSCH相关联的上行接收干扰功率（RIP）。 eNodeB然后将上行链路测量结果报告给MDT服务器。 MDT服务器能够基于PHR和上行链路测量结果确定上行链路覆盖。

公开(公告)号：US20160014629A1

公开(公告)日：2016-01-14

申请号：US14859604

申请日：2015-09-21

Applicant: MEDIATEK INC.

Inventor： Per Johan Mikael Johansson ,  Yih-Shen Chen

IPC: H04W24/10 ,  H04W64/00 ,  H04W76/02 ,  H04W72/04

CPC classification number: H04W24/08 ,  H04W24/10 ,  H04W36/0005 ,  H04W64/00 ,  H04W72/0406 ,  H04W76/19 ,  H04W88/02 ,  H04W88/08

Abstract: A method of throughput and data volume measurement for minimization of drive test (MDT) is proposed. A base station establishes a radio resource control (RRC) connection with a user equipment (UE) in a mobile communication network. The base station or UE measures transmitted or received data volume during a transmission time of a data burst between the base station and the UE. When the data burst spans multiple measurement periods and the data burst is split at each measurement period boundary. For each measurement period, data volume during the measurement period is measured to generate a measurement result. When throughput measurement is performed by the network, the base station receives location information that is available during the transmission time of the data burst. The data volume measurement is logged with time stamp such that each measurement result can correlated with the location information.

Abstract translation: 提出了一种用于最小化驱动测试（MDT）的吞吐量和数据量测量方法。 基站在移动通信网络中与用户设备（UE）建立无线资源控制（RRC）连接。 基站或UE在基站和UE之间的数据突发的传输时间期间测量发送或接收的数据量。 当数据脉冲串跨越多个测量周期，并且数据脉冲串在每个测量周期边界处被分离。 对于每个测量周期，测量测量期间的数据量以产生测量结果。 当由网络执行吞吐量测量时，基站接收在数据突发的发送时间期间可用的位置信息。 使用时间戳记录数据量测量，使得每个测量结果可以与位置信息相关联。

公开(公告)号：US09203574B2

公开(公告)日：2015-12-01

申请号：US14479602

申请日：2014-09-08

Applicant: MEDIATEK INC.

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

IPC: H04L5/00 ,  H04W24/10 ,  H04W24/08 ,  H04W36/00

CPC classification number: H04L5/0032 ,  H04L1/20 ,  H04W24/08 ,  H04W24/10 ,  H04W36/0094

Abstract: A method of UE RSRQ measurement precaution for interference coordination is provided. The UE receives radio signals of a neighbor cell under measurement. The neighbor cell applies a TDM silencing pattern for inter-cell interference coordination (TDM ICIC). The UE determines a measurement pattern that includes multiple subframes. The UE performs RSRQ measurements of the cell over multiple subframes and obtains multiple RSRQ measurement samples. The UE derives RSRQ measurement result by estimating the multiple RSRQ samples and applying a weighted average. RSRQ samples estimated to be more applicable are taken into account to more extent (e.g., applied with more weight), and/or RSRQ samples estimated to be less applicable are taken into account to less extent (e.g., applied with less weight, or discarded with zero weight). With UE precaution, a more predictable RSRQ measurement result is produced.

Abstract translation: 提供了一种用于干扰协调的UE RSRQ测量预防措施。 UE接收测量的相邻小区的无线电信号。 相邻小区对小区间干扰协调（TDM ICIC）应用TDM消隐模式。 UE确定包括多个子帧的测量模式。 UE通过多个子帧执行小区的RSRQ测量，并获得多个RSRQ测量样本。 UE通过估计多个RSRQ样本并应用加权平均值来导出RSRQ测量结果。 在更大程度上考虑到更多适用的RSRQ样本（例如，应用更多的权重），和/或估计不太适用的RSRQ样本在较少程度上被考虑（例如，应用较少的权重或丢弃 零重量）。 使用UE预防措施，产生更可预测的RSRQ测量结果。

公开(公告)号：US20150334620A1

公开(公告)日：2015-11-19

申请号：US14753840

申请日：2015-06-29

Applicant: MEDIATEK INC.

Inventor： I-Kang Fu ,  Yih-Shen Chen ,  William Plumb ,  Per Johan Mikael Johansson

IPC: H04W36/20 ,  H04W24/10

CPC classification number: H04W36/20 ,  H04W24/10 ,  H04W88/06

Abstract: A method of implicit signaling to support In-Device coexistence interference avoidance is provided. A UE sends an IDC interference indication to an eNB. The indication indicates that a serving frequency becomes unusable due to a coexistence interference problem. The indication does not explicitly indicate a frequency index or a frequency location of the unusable serving frequency. The eNB determines the serving frequency as unusable in an implicit manner. The eNB also determines an implied unusable frequency region based on the received IDC indication. The implied unusable frequency region is between the serving frequency and the ISM band. In one advantageous aspect, the eNB configures a condition for the UE, such that the UE is refrained from sending IDC interference indications unless the condition is satisfied.

Abstract translation: 提供了一种支持In-Device共存干扰避免的隐式信令的方法。 UE向eNB发送IDC干扰指示。 该指示表示由于共存干扰问题，服务频率变得不可用。 该指示没有明确地指示不可用的服务频率的频率索引或频率位置。 eNB将服务频率以隐含的方式确定为不可用。 eNB还基于接收的IDC指示确定隐含的不可用频率区域。 隐含的不可用频率区域在服务频率和ISM频带之间。 在一个有利的方面，eNB配置UE的条件，使得除非满足条件，否则UE不会发送IDC干扰指示。