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    Power control and scheduling in Ofdm system
    2.
    发明专利
    Power control and scheduling in Ofdm system 有权
    空值

    公开(公告)号：JP5335871B2

    公开(公告)日：2013-11-06

    申请号：JP2011197205

    申请日：2011-09-09

    Applicant: クゥアルコム・インコーポレイテッドQualcomm Incorporated

    Inventor： アイマン・ファウズィ・ナグイブ ,  アブニーシュ・アグラワル ,  アラク・スティボン

    IPC: H04W72/04 ,  G01R31/08 ,  H04B7/005 ,  H04J11/00 ,  H04L20060101 ,  H04L27/26 ,  H04W72/08

    CPC classification number: H04W52/24 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0058 ,  H04L5/006

    Abstract: A system and method for power control and scheduling of sub-carriers in an OFDM communication system. The receiver dynamic range can be minimized by a power control loop that attempts to maintain received power over a noise floor in a predetermined range. If the received power relative to a noise floor in allocated sub-carriers exceeds the predetermined range and the total received power is at the minimum, the scheduling system allocates an additional sub-carrier to the communication link. Additionally, if the received power relative to the noise floor is less than the predetermined range minimum, and the total received power is at a maximum, the scheduling system de-allocates a sub-carrier from the communication link. The scheduling system may also adjust an encoding rate to maintain a relatively constant symbol rate in each sub-carrier.

    Abstract translation: 一种用于OFDM通信系统中的子载波的功率控制和调度的系统和方法。 可以通过功率控制环路来最小化接收器动态范围，该功率控制环路尝试在预定范围内的噪声基底上保持接收功率。 如果所分配的子载波中相对于本底噪声的接收功率超过预定范围并且总接收功率处于最小，则调度系统向通信链路分配附加子载波。 此外，如果相对于本底噪声的接收功率小于预定范围最小值，并且总接收功率处于最大值，则调度系统从通信链路去分配子载波。 调度系统还可以调整编码速率以在每个子载波中维持相对恒定的符号率。

    Multiple-input multiple output system and method
    3.
    发明专利
    Multiple-input multiple output system and method 有权
    多输入多输出系统及方法

    公开(公告)号：JP2013132064A

    公开(公告)日：2013-07-04

    申请号：JP2013021280

    申请日：2013-02-06

    Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

    Inventor： SUN QINFANG ,  CHOI WON-JOON ,  JEFFREY M GILBERT ,  ARDAVAN MALEKI TEHRANI

    IPC: H04J99/00 ,  H04B7/04 ,  H04L20060101 ,  H04Q7/00

    CPC classification number: H04B7/0421 ,  H04B7/0413 ,  H04B7/0613 ,  H04B7/0684 ,  H04L1/0041 ,  H04L1/0054 ,  H04L1/0061 ,  H04L1/06 ,  H04L1/0656 ,  H04L1/1819 ,  H04L1/1829 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0226 ,  H04L27/0014 ,  H04L2025/03426

    Abstract: PROBLEM TO BE SOLVED: To provide a system which is for a legacy device compatible with the IEEE802.11a specification and the 802.11g specification for a wireless LAN (WLAN) and prevents "stomping" of MIMO packets by starting transmission of a subsequent MIMO packet before completing a preceding MIMO packet.SOLUTION: A time-division training pattern for MIMO packets is provided. In this pattern, a first antenna can transmit a short symbol, a first long symbol, and then a SIGNAL symbol in this order. A second antenna can transmit a second long symbol after the transmission of the legacy SIGNAL symbol. The first and second antennas can transmit SIGNAL symbols (associated with MIMO data) substantially simultaneously after transmission of the second long symbol. The invention allows a legacy device to decode the length of a MIMO packet and refrain from the transmission during the period of the MIMO packet.

    Abstract translation: 要解决的问题：提供一种用于与IEEE802.11a规范兼容的传统设备和用于无线LAN（WLAN）的802.11g规范的系统，并通过开始后续MIMO分组的传输来防止MIMO分组的“踩踏” 在完成先前的MIMO分组之前。提供了一种用于MIMO分组的时分训练模式。 在该模式中，第一天线可以按顺序发送短符号，第一长符号，然后发送信号符号。 第二天线可以在传统的SIGNAL符号的传输之后发送第二个长符号。 第一和第二天线可以在发送第二长符号之后基本上同时发送信号符号（与MIMO数据相关联）。 本发明允许传统设备对MIMO分组的长度进行解码，并且避免在MIMO分组期间的传输。

    Exchange of key material
    4.
    发明专利
    Exchange of key material 有权
    关键材料交换

    公开(公告)号：JP2012217207A

    公开(公告)日：2012-11-08

    申请号：JP2012158298

    申请日：2012-07-17

    Applicant: Intellectual Ventures I Llc ,  インタレクチュアル ヴェンチャーズ ファースト エルエルシー

    Inventor： DAN FORSBERG ,  LAURI TARKKALA

    IPC: H04L9/08 ,  H04L20060101 ,  H04L29/06 ,  H04W36/00

    CPC classification number: H04L63/0428 ,  H04L63/04 ,  H04L63/0435 ,  H04L63/06 ,  H04L63/062 ,  H04L2209/80 ,  H04W12/02 ,  H04W12/04 ,  H04W12/06 ,  H04W12/08 ,  H04W36/0016 ,  H04W36/0033 ,  H04W36/02

    Abstract: PROBLEM TO BE SOLVED: To manage key material.SOLUTION: A method for handoff between a first access node and a second access node in a communications network comprises the steps of: receiving a handoff request from a mobile terminal by the second access node; transmitting a session context request by the second access node to the first access node; transmitting session context information from the first access node to the second access node; extracting an encrypted session key from the received session context information by the second access node; decrypting the encrypted session key with a key associated with a security association between the second access node and a security node of the communications network; encrypting at least part of a message with the decrypted session key for transmission of the message to the mobile terminal; and transmitting the message to the mobile terminal.

    Abstract translation: 要解决的问题：管理关键材料。 解决方案：一种用于在通信网络中的第一接入节点和第二接入节点之间进行切换的方法包括以下步骤：由第二接入节点从移动终端接收切换请求; 将所述第二接入节点的会话上下文请求发送到所述第一接入节点; 将会话上下文信息从所述第一接入节点传送到所述第二接入节点; 由所述第二接入节点从所接收的会话上下文信息中提取加密会话密钥; 用与所述第二接入节点和所述通信网络的安全节点之间的安全关联相关联的密钥解密所述加密的会话密钥; 用解密的会话密钥对消息的至少一部分进行加密，以将消息传输到移动终端; 以及将所述消息发送到所述移动终端。 版权所有（C）2013，JPO＆INPIT

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