公开(公告)号：WO2016114773A1

公开(公告)日：2016-07-21

申请号：PCT/US2015/011399

申请日：2015-01-14

Applicant: HITACHI, LTD.

Inventor： ACHARYA, Joydeep ,  AKOUM, Salam

IPC: H04W72/00

CPC classification number: H04W24/02 ,  H04W4/70

Abstract: Example implementations of the present disclosure are directed to an Evolved Packet Core (EPC) Control Module by which a cellular operator decides how and when to form new core networks, each dedicated to a specific type(s) of User Equipment (UEs). Example implementations can divide the mobility management entity (MME) of the original EPC into potentially two MMEs, one each for Human to Human (H2H) and Machine Type (MTC) UEs, based on the signal load reduction for MTC UEs. Example implementations can also divide the core network user plane bandwidth into separate user planes, based on the number of UEs in different access class for H2H and MTC UEs.

Abstract translation: 本公开的示例性实现涉及演进的分组核心（EPC）控制模块，蜂窝运营商通过该控制模块决定如何以及何时形成新的核心网络，每个核心网络专用于特定类型的用户设备（UE）。 基于MTC UE的信号负载降低，示例实现可以将原始EPC的移动性管理实体（MME）划分为潜在的两个MME，每个MME分别用于人到人（H2H）和机器类型（MTC）UE。 基于针对H2H和MTC UE的不同接入类别中的UE的数量，示例性实现还可以将核心网络用户平面带宽划分为单独的用户平面。

公开(公告)号：WO2015060880A1

公开(公告)日：2015-04-30

申请号：PCT/US2013/066978

申请日：2013-10-25

Applicant: HITACHI, LTD.

Inventor： ACHARYA, Joydeep ,  AKOUM, Salam ,  GAUR, Sudhanshu

IPC: H04M1/00

CPC classification number: H04B7/0639 ,  H04B7/024 ,  H04B7/0469

Abstract: Example implementations described herein are directed to systems and methods for constructing codebooks for uniform planar array based base stations. The example implementations characterize the spatial correlations of the channel resulting from the uniform planar array arrangement and quantize the correlations for possible values to obtain the codebooks. The codebook utilized in the example implementations may lead to higher throughput than existing codebooks being used in long term evolution systems, for base stations utilizing a uniform planar array.

Abstract translation: 本文描述的示例实现涉及用于构建用于基于均匀的平面阵列的基站的码本的系统和方法。 示例实现表征由均匀平面阵列布置产生的信道的空间相关性，并量化可能值的相关性以获得码本。 在示例实现中使用的码本可以导致比用于长期演进系统的现有码本更高的吞吐量，对于使用均匀平面阵列的基站。

公开(公告)号：WO2017023334A1

公开(公告)日：2017-02-09

申请号：PCT/US2015/044056

申请日：2015-08-06

Applicant: HITACHI, LTD.

Inventor： ACHARYA, Joydeep ,  AKOUM, Salam

IPC: H04W24/02

CPC classification number: H04W24/02 ,  H04W24/04 ,  H04W24/08

Abstract: Example implementations described herein are directed to the network obtaining insight into client side KPIs for video transmission to optimize the improving QoE. In example implementations, there is a framework of test videos placed at various segments of the network and an application running at the client that downloads a subset of these videos and feeds back the KPIs to a central server. Such implementations may improve overall efficiency and QoE of video transmissions over cellular network.

Abstract translation: 这里描述的示例性实现涉及网络，获得洞察用于视频传输的客户端KPI以优化改进的QoE。 在示例实现中，存在放置在网络的各个部分的测试视频的框架以及在客户端上运行的应用程序，该应用程序下载这些视频的一部分并将KPI反馈到中央服务器。 这样的实现可以提高通过蜂窝网络的视频传输的总体效率和QoE。

公开(公告)号：WO2016114768A1

公开(公告)日：2016-07-21

申请号：PCT/US2015/011257

申请日：2015-01-13

Applicant: HITACHI, LTD.

Inventor： ACHARYA, Joydeep ,  AKOUM, Salam

IPC: H04W72/04

CPC classification number: H04W28/08 ,  H04W36/22

Abstract: Example implementations described herein are directed to systems and methods by which Radio Access Network (RAN) level information such as existing base station load and channel conditions can be combined with application information to perform application aware RAN load balancing. This can facilitate the end-to-end quality of service (QoS) of the users.

Abstract translation: 本文描述的示例实现涉及可以将诸如现有基站负载和信道条件的无线电接入网络（RAN）级别信息与应用信息组合以执行应用感知RAN负载平衡的系统和方法。 这可以促进用户端到端的服务质量（QoS）。

公开(公告)号：WO2015152931A1

公开(公告)日：2015-10-08

申请号：PCT/US2014/032887

申请日：2014-04-03

Applicant: HITACHI, LTD.

Inventor： AKOUM, Salam ,  ACHARYA, Joydeep ,  MUKHERJEE, Amitav

IPC: H04W88/08

CPC classification number: H04W16/28

Abstract: Example implementations described herein are directed to forming additional sectors in the vertical domain (called vertical sectorization) for a base station (BS). Example implementations may involve various methods of forming and operating vertical sectors. Example implementations may involve a BS configured with a two dimensional active antenna grid such as in a Full Dimensional Multiple Input Multiple Output (FD-MIMO) system. Example implementations may allow a network operator to create vertical sectors, perform initial configuration and optimize the subsequent data rate performance.

Abstract translation: 本文描述的示例性实现涉及在基站（BS）的垂直域（称为垂直扇区化）中形成附加扇区。 示例性实现可以涉及形成和操作垂直扇区的各种方法。 示例性实现可以包括配置有诸如全尺寸多输入多输出（FD-MIMO）系统中的二维有源天线网格的BS。 示例实现可以允许网络运营商创建垂直扇区，执行初始配置并优化随后的数据速率性能。

公开(公告)号：WO2014149062A1

公开(公告)日：2014-09-25

申请号：PCT/US2013/033594

申请日：2013-03-22

Applicant: HITACHI, LTD. ,  GAO, Long ,  GAUR, Sudhanshu ,  ACHARYA, Joydeep

Inventor： GAO, Long ,  GAUR, Sudhanshu ,  ACHARYA, Joydeep

IPC: H04W4/00

CPC classification number: H04L5/0092 ,  H04L5/0051 ,  H04L5/0085 ,  H04L5/14 ,  H04W4/021 ,  H04W4/027

Abstract: Example implementations described herein are directed to systems and methods of using the Demodulation Reference Signal (DMRS) in a manner to reduce the DMRS overhead in the Long Term Evolution (LTE)-Advanced downlink. In example implementations, an enhanced node B (eNodeB) transmits the DMRS only in some of the Resource Blocks (RBs) that are scheduled for a User Equipment (UE). The frequency of which the DMRS is transmitted is determined by the eNodeB based on one or more attributes of the UE and signaled to the UE via Radio Resource Control (RRC) signaling. At the UE receiver, the Physical Downlink Shared Channel (PDSCH) is demodulated based on the received DMRS configuration. Example implementations can thereby reduce the DMRS overhead by avoiding DMRS transmission in some subframes.

Abstract translation: 本文描述的示例实施例涉及以减少长期演进（LTE）高级下行链路中的DMRS开销的方式使用解调参考信号（DMRS）的系统和方法。 在示例实现中，增强节点B（eNodeB）仅在为用户设备（UE）调度的一些资源块（RB）中发送DMRS。 发射DMRS的频率由eNodeB根据UE的一个或多个属性确定，并通过无线电资源控制（RRC）信令向UE发送信号。 在UE接收机处，物理下行链路共享信道（PDSCH）根据所接收的DMRS配置进行解调。 因此，示例性实现可以通过避免某些子帧中的DMRS传输来减少DMRS开销。

公开(公告)号：WO2016114767A1

公开(公告)日：2016-07-21

申请号：PCT/US2015/011254

申请日：2015-01-13

Applicant: HITACHI, LTD.

Inventor： AKOUM, Salam ,  ACHARYA, Joydeep

IPC: H04L1/00

CPC classification number: H04L5/0035 ,  H04L67/2842

Abstract: Example implementations described herein are directed to systems and methods by which cooperative strategies at the Radio Access Network (RAN) are modified to take into account cached content at the enhanced Node Bs in addition to channel quality information. This results in a reduction of the overall network traffic, and improves the Quality of Experience for the user.

Abstract translation: 本文描述的示例性实现涉及系统和方法，通过该系统和方法，修改无线电接入网络（RAN）处的协作策略以除了信道质量信息之外还考虑增强型节点B处的高速缓存的内容。 这导致整体网络流量的减少，并提高用户的体验质量。

公开(公告)号：WO2016010526A1

公开(公告)日：2016-01-21

申请号：PCT/US2014/046726

申请日：2014-07-15

Applicant: HITACHI, LTD.

Inventor： GAUR, Sudhanshu ,  MUKHERJEE, Amitav ,  ACHARYA, Joydeep

IPC: H04W74/08

CPC classification number: H04W28/0205

Abstract: The present disclosure is directed to ways in which the mobile core network interacts with the end user to control congestion and bring about traffic management, thus improving the overall end-to-end performance. Example implementations described may involve a core network which constructs a database that stores the traffic characteristics in a given geographical region (such as a train station).The traffic characteristics include the spatio-temporal variation in volume and type of application of the traffic from all users. Based on the database the network determines the congestion that a given user would face for a given type of service flow. This depends on the nature of the flow such as the underlying application and also the priority status of the user.

Abstract translation: 本公开涉及移动核心网与最终用户交互以控制拥塞并带来流量管理的方式，从而提高整体端到端的性能。 所描述的示例实现可以包括构建在给定地理区域（例如火车站）中存储业务特性的数据库的核心网络。业务特征包括来自所有业务的业务的数量和应用类型的时空变化 用户。 基于数据库，网络确定给定用户对于给定类型的服务流将面临的拥塞。 这取决于流的性质，例如底层应用程序以及用户的优先级状态。

公开(公告)号：WO2015167546A1

公开(公告)日：2015-11-05

申请号：PCT/US2014/036207

申请日：2014-04-30

Applicant: HITACHI, LTD.

Inventor： MUKHERJEE, Amitav ,  AKOUM, Salam ,  ACHARYA, Joydeep

IPC: H04L12/26

CPC classification number: H04W80/02 ,  H04L43/0817 ,  H04W28/08 ,  H04W76/12 ,  H04W76/15 ,  H04W92/20

Abstract: Dual connectivity (DC) is a paradigm where a UE is equipped with multiple transmit/receive modules and consumes radio resources from one or more Master eNBs (MeNBs) and Secondary eNBs (SeNBs) simultaneously. In the downlink split bearer DC architecture, the MeNB splits an EPS bearer at the radio level and forwards a portion of the bearer contents to the SeNB which serves it to the UE. Example implementations described herein are directed to how the MeNB performs transmission control and buffer management of the split bearer with minimal coordination from the SeNBs.

Abstract translation: 双连接（DC）是UE配备多个发射/接收模块并同时从一个或多个主eNB（MeNB）和辅助eNB（SeNB）消耗无线电资源的范例。 在下行分组承载DC架构中，MeNB在无线电级别分解EPS承载，并将承载内容的一部分转发给UE所服务的SeNB。 本文描述的示例实现涉及MeNB如何以最小的SeNB的协调来执行分离承载的传输控制和缓冲器管理。

公开(公告)号：WO2015084334A1

公开(公告)日：2015-06-11

申请号：PCT/US2013/072882

申请日：2013-12-03

Applicant: HITACHI, LTD.

Inventor： GAO, Long ,  GAUR, Sudhanshu ,  ACHARYA, Joydeep

IPC: H04B7/00

CPC classification number: H04B7/024 ,  H04L5/00

Abstract: Example implementations are directed to small cell activation systems and methods in a LTE-Advanced network. Each small cell in a cluster turns itself on following a given period and time offset. For a particular small cell, the activation procedure is divided into two stages. In the first stage, the small cell sends a reference signal and broadcasts system information. It collects the traffic information of its associated UEs and sends the information to its neighboring cells via backhaul. The small cell does not serve any UE in this stage. Any UE that is associated to it will be handed over to one of its neighboring active cells when packets arrive. In the second stage, the small cell decides whether to turn itself on based on the collected information and feedbacks from its neighboring cells, and will serve its associated UEs if it decides to turn itself on.

Abstract translation: 示例实现涉及LTE-Advanced网络中的小小区激活系统和方法。 群集中的每个小单元都会按照给定的时间和时间偏移量自行调整。 对于特定的小单元，激活程序分为两个阶段。 在第一阶段，小小区发送参考信号并广播系统信息。 它收集其相关联的UE的业务信息，并通过回程将信息发送到其相邻小区。 在这个阶段，小小区不服务任何UE。 当分组到达时，与其相关联的任何UE将被切换到其相邻活动小区中的一个。 在第二阶段，小单元根据所收集的信息和来自其相邻小区的反馈决定是否自己开启，并且如果它决定开启自身，则将服务于其相关联的UE。