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    DATA ENCRYPTION PROTOCOLS FOR MOBILE SATELLITE COMMUNICATIONS
    1.
    发明申请
    DATA ENCRYPTION PROTOCOLS FOR MOBILE SATELLITE COMMUNICATIONS 审中-公开
    用于移动卫星通信的数据加密协议

    公开(公告)号：WO2014179367A1

    公开(公告)日：2014-11-06

    申请号：PCT/US2014/035964

    申请日：2014-04-29

    Applicant: HUGHES NETWORK SYSTEMS, LLC

    Inventor： RAVISHANKAR, Channasandra ,  ZAKARIA, Gaguk ,  BENAMMAR, Nassir ,  CORRIGAN, John

    IPC: H04W12/04

    CPC classification number: H04L9/14 ,  H04L9/0819 ,  H04L9/0841 ,  H04L63/0428 ,  H04L2209/24 ,  H04L2209/80 ,  H04W12/02 ,  H04W12/04 ,  H04W76/12 ,  H04W84/06

    Abstract: An approach for improved security protocols in a mobile satellite system is provided. A remote terminal performs a key establishment function, including determination of a first encryption key for encrypting data for transmission over the satellite communications channels, and determination of an authentication key for authenticating entities communicating over the communications channels. The remote terminal receives a security mode command including a key indicator, and determines a second encryption key for enhanced session data security over communications channels. The second encryption key is determined based on the key indicator and a key generation algorithm. The remote terminal further determines a key indicator response and transmits a security mode complete command including the key indicator response to a satellite base station subsystem (SBSS). The key indicator response is constructed for the SBSS to determine the second encryption key based on the key indicator response and a key generation algorithm.

    Abstract translation: 提供了一种用于改进移动卫星系统中的安全协议的方法。 远程终端执行密钥建立功能，包括确定用于加密卫星通信信道传输的数据的第一加密密钥，以及用于认证通过通信信道通信的实体的认证密钥的确定。 远程终端接收包括密钥指示符的安全模式命令，并且通过通信信道确定增强的会话数据安全性的第二加密密钥。 第二加密密钥是基于密钥指示符和密钥生成算法确定的。 远程终端还确定密钥指示符响应，并向卫星基站子系统（SBSS）发送包括密钥指示符响应的安全模式完成命令。 构建关键指示符响应，用于SBSS基于密钥指示符响应和密钥生成算法来确定第二加密密钥。

    ENHANCED PAGING IN 4G LTE MOBILE SATELLITE SYSTEMS
    3.
    发明申请
    ENHANCED PAGING IN 4G LTE MOBILE SATELLITE SYSTEMS 审中-公开

    公开(公告)号：WO2018148696A1

    公开(公告)日：2018-08-16

    申请号：PCT/US2018/017888

    申请日：2018-02-12

    Applicant: HUGHES NETWORK SYSTEMS, LLC

    Inventor： ZAKARIA, Gaguk ,  RAVISHANKAR, Channasandra

    IPC: H04W68/00 ,  H04L29/06 ,  H04B7/185

    Abstract: Enhanced paging for an LTE mobile satellite system (MSS-LTE) network, including determining that a user terminal (UT) is in a second state in which the UT has established a Non-Access Stratum (NAS) protocol signaling connection with the network and an active Radio Resource Control protocol (RRC) connection with the network; determining, as a result of the UT being inactive while the UT is in the second state, that the UT is in a third state in which the UT maintains the NAS connection and releases or suspends the RRC connection; receiving a request to establish a multimedia session with the UT; transmitting, in response to receiving the request and the UT being in the third state, an E-RAB SETUP REQUEST including a priority value indicating the session is suitable for a high penetration alerting procedure; receiving the E-RAB SETUP REQUEST; and in response to receiving the E-RAB SETUP REQUEST, transmitting a high penetration alert signal to the UT.

    SYSTEM AND METHOD FOR EFFICIENT USE OF RADIO RESOURCES FOR PUSH-TO-TALK SERVICES IN MOBILE WIRELESS COMMUNICATIONS SYSTEMS
    4.
    发明申请
    SYSTEM AND METHOD FOR EFFICIENT USE OF RADIO RESOURCES FOR PUSH-TO-TALK SERVICES IN MOBILE WIRELESS COMMUNICATIONS SYSTEMS 审中-公开
    无线电资源在移动无线通信系统中有效利用推挽服务的系统和方法

    公开(公告)号：WO2013177562A1

    公开(公告)日：2013-11-28

    申请号：PCT/US2013/042740

    申请日：2013-05-24

    Applicant: HUGHES NETWORK SYSTEMS, LLC

    Inventor： ARUR, Deepak ,  RAVISHANKAR, Channasandra ,  BENAMMAR, Nassir ,  ZAKARIA, Gaguk ,  MIRRA, Steve

    IPC: H04B1/38

    CPC classification number: H04W4/10 ,  H04W76/40

    Abstract: A resource efficient approach for push-to-talk (PTT) services over a mobile communications network is provided. A remote terminal (UT) receives a command for initiating a PTT session. The UT generates a RAB binding create message, including a PTT session identifier and RAB binding information, and transmits the RAB binding create message to a wireless gateway. The UT receives a RAB binding response from the wireless gateway, and performs a protocol signaling process for establishing PDP bearers, and for establishing the PTT session on a PTT server. The UT receives a command for initiation of media transmission for the PTT session, generates talk burst (TB) request message, and transmits the request message to the wireless gateway (the TB request message is transmitted via media access control (MAC) layer control messaging). In response, the UT receives a talk burst grant message from the wireless gateway.

    Abstract translation: 提供了一种通过移动通信网络进行即按即说（PTT）服务的资源有效方法。 远程终端（UT）接收用于发起PTT会话的命令。 UT生成RAB绑定创建消息，包括PTT会话标识符和RAB绑定信息，并将RAB绑定创建消息发送到无线网关。 UT从无线网关接收RAB绑定响应，并执行用于建立PDP承载的协议信令处理，并在PTT服务器上建立PTT会话。 UT接收到用于PTT会话的媒体发送的启动命令，生成通话突发（TB）请求消息，并将该请求消息发送到无线网关（通过媒体接入控制（MAC）层控制消息传送 ）。 作为响应，UT从无线网关接收到通话突发授权消息。

    SYSTEM AND METHOD OF PAGING IN GEO SATELLITE-BASED 5G NETWORKS
    6.
    发明申请
    SYSTEM AND METHOD OF PAGING IN GEO SATELLITE-BASED 5G NETWORKS 审中-公开

    公开(公告)号：WO2021067803A1

    公开(公告)日：2021-04-08

    申请号：PCT/US2020/054066

    申请日：2020-10-02

    Applicant: HUGHES NETWORK SYSTEMS, LLC

    Inventor： RAVISHANKAR, Channasandra ,  ZAKARIA, Gaguk

    IPC: H04W64/00 ,  H04W84/06

    Abstract: Systems and methods implementing a satellite radio access network (SRAN) receiving a registration request from a user terminal (UT), determining a current tracking area (TA) of the UT, forwarding the registration request and the current TA to an access and mobility management function (AMF), and receiving a registration accept from the AMF that indicates a UT registration area. An implementation receives a UT page command from the AMF and, in response, determines a satellite beam for paging the UT, from among a plurality of satellite beams using the identifier of the current TA, and pages the UT on the satellite beam.

    PLACEMENT OF CALIBRATION EARTH STATIONS FOR GROUND BASED BEAM FORMING IN A SATELLITE SYSTEM
    9.
    发明申请
    PLACEMENT OF CALIBRATION EARTH STATIONS FOR GROUND BASED BEAM FORMING IN A SATELLITE SYSTEM 审中-公开

    公开(公告)号：WO2019023036A1

    公开(公告)日：2019-01-31

    申请号：PCT/US2018/042824

    申请日：2018-07-19

    Applicant: HUGHES NETWORK SYSTEMS, LLC

    Inventor： VASAVADA, Yash ,  RAVISHANKAR, Channasandra ,  CORRIGAN, John ,  ZAKARIA, Gaguk ,  HUANG, Xiaoling

    IPC: H04B7/185 ,  H04B7/204

    Abstract: A system and method for estimating calibration parameters and locating a Calibration Earth Station (CES) is described. The method may be performed offline. The method includes: providing LxM pilot signal measurements in a matrix R from L CESs and the M feed elements, wherein the matrix R comprises a set of channel coefficients c = {c1, c2,..., cM}, and k = {k1, k2,..., kL} perturbations; linking a subset of channel coefficients {c1, c2,..., cM} using each of the L CESs; and estimating a relative estimate of the k = {kl, k2,...,kL} perturbations across the L CESs by using each of the L CESs as a bridging element. In the method, the bridging element provides a strong pilot signal for at least two of the L CESs. A set of criteria for determining locations of CESs have been described. A set of desirable properties for the solution set of L CESs have been disclosed. A combination of inner loop and outer loop methods for determining the final set of optimal locations have been described.

    NETWORK SHARING BY MULTIPLE SERVICE PROVIDERS IN A 3GPP FRAMEWORK USING SINGLE CORE NETWORK
    10.
    发明申请
    NETWORK SHARING BY MULTIPLE SERVICE PROVIDERS IN A 3GPP FRAMEWORK USING SINGLE CORE NETWORK 审中-公开

    公开(公告)号：WO2018165336A1

    公开(公告)日：2018-09-13

    申请号：PCT/US2018/021402

    申请日：2018-03-07

    Applicant: HUGHES NETWORK SYSTEMS, LLC

    Inventor： RAVISHANKAR, Channasandra ,  BENAMMAR, Nassir ,  ZAKARIA, Gaguk

    IPC: H04W88/06 ,  H04L29/02 ,  H04W72/04

    Abstract: A method is provided for network equipment and resource sharing amongst service providers within a communications network. Parameters are determined, each associated with an SP(ID) identifying a respective service provider. The Parameters relate to network parameters of a that are utilized for standard network processes unrelated to service provider identification. A control message is received, including a UT-ID associated with a user terminal (UT). The UT is associated with one service provider. The control message is received as part of configuration of network services for the UT. One of the Parameters is determined that is associated with the UT-ID, and one SP(ID) is determined that is associated with the determined Parameter. Communications channels are provided to the UT for network services. The communications channels are configured based on share parameters defining a share of network resources allocated to the service provider to which the determined SP(ID) corresponds.

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