Handoffs and handoff selection in a wireless access network
    21.
    发明授权
    Handoffs and handoff selection in a wireless access network 有权
    无线接入网络中的切换和切换选择

    公开(公告)号:US08909226B2

    公开(公告)日:2014-12-09

    申请号:US11570028

    申请日:2005-06-03

    IPC分类号: H04W36/00 H04W36/30 H04W36/18

    摘要: The present invention facilitates handoffs for a mobile terminal in a wireless access network that is capable of supporting different types of handoffs. The different handoff types may include soft handoffs and fast base station switching (FBSS). In operation, context information associated with supporting wireless communications between the wireless access network and the mobile terminal are determined. Based on whether the context information is shared between base stations involved in the handoff or transferred from one base station to another of the base stations involved in the handoff, a particular handoff type is selected from the different handoff types that are available. Selecting the specific type of handoff to use may also be based on the level of context information that is available, the actual content of the context information, application preferences, channel conditions, base station or mobile terminal capabilities, or any combination thereof.

    摘要翻译: 本发明有助于能够支持不同类型的切换的无线接入网络中的移动终端的切换。 不同的切换类型可以包括软切换和快速基站切换(FBSS)。 在操作中,确定与支持无线接入网络和移动终端之间的无线通信相关联的上下文信息。 基于上下文信息是否在切换中涉及的基站或从一个基站传送到切换中涉及的基站的另一个基站之间共享,从可用的不同切换类型中选择特定切换类型。 选择要使用的特定类型的切换还可以基于可用的上下文信息的级别,上下文信息的实际内容,应用偏好,信道条件,基站或移动终端能力,或其任何组合。

    Methods and systems for orthogonal frequency division multiplexing (OFDM) multiple zone partitioning
    23.
    发明授权
    Methods and systems for orthogonal frequency division multiplexing (OFDM) multiple zone partitioning 有权
    用于正交频分复用(OFDM)多区划分的方法和系统

    公开(公告)号:US08542771B2

    公开(公告)日:2013-09-24

    申请号:US13292643

    申请日:2011-11-09

    IPC分类号: H04L27/00

    摘要: Aspects of the invention include methods and devices for inserting data and pilot symbols into Orthogonal Frequency Division Multiplexing (OFDM) frames having a time domain and a frequency domain. A method involves inserting in at least one zone of a first type a two dimensional array of data and pilot symbols in time and frequency and inserting in at least one zone of a second type a two dimensional array of data and pilot symbols in time and frequency. In some implementations the zone of the first type comprises common pilot symbols that can be detected by all receivers receiving the OFDM frame. In some implementations the zone of the second type comprises dedicated pilot symbols that are only detectable by a receiver that is aware of pre-processing used to encode the dedicated pilot symbols.

    摘要翻译: 本发明的方面包括用于将数据和导频符号插入具有时域和频域的正交频分复用(OFDM)帧的方法和装置。 一种方法包括在时间和频率上插入数据和导频符号的二维阵列的第一类型的至少一个区域,并在第二类型的至少一个区域中插入时间和频率的数据和导频符号的二维阵列 。 在一些实现中,第一类型的区域包括可由接收OFDM帧的所有接收机检测的公共导频符号。 在一些实施方式中,第二类型的区域包括专用导频符号,其仅可以被知道用于对专用导频符号进行编码的预处理的接收机检测。

    SOFT HANDOFF IN OFDMA SYSTEM
    26.
    发明申请
    SOFT HANDOFF IN OFDMA SYSTEM 有权
    OFDMA系统中的软操作

    公开(公告)号:US20110310846A1

    公开(公告)日:2011-12-22

    申请号:US13221535

    申请日:2011-08-30

    IPC分类号: H04W36/00

    摘要: Soft handoff in an OFDMA system is disclosed. If the pilot signal strength for a base station exceeds the defined threshold, the base station is added to an active set list. Subcarriers in a plurality of orthogonal frequency division multiplexing (OFDM) symbols are divided and allocated into subchannels. The OFDM symbols are divided and multiplexed. A soft handoff zone with a first dimension of the subchannels and a second dimension of the divided and multiplexed OFDM symbols is defined. The soft handoff zone has subcarriers with a subchannel definition, for example, an identical permutation.

    摘要翻译: 披露了OFDMA系统中的软切换。 如果基站的导频信号强度超过定义的阈值,则将基站添加到活动集列表中。 多个正交频分复用(OFDM)符号中的子载波被划分并分配给子信道。 OFDM符号被分割和多路复用。 定义了具有子信道的第一维度和分割和多路复用的OFDM符号的第二维度的软切换区域。 软切换区具有子信道定义的子载波,例如相同的置换。

    System and Method for Unbalanced Relay-Based Wireless Communications
    27.
    发明申请
    System and Method for Unbalanced Relay-Based Wireless Communications 有权
    基于中继无线通信的不平衡系统和方法

    公开(公告)号:US20080285499A1

    公开(公告)日:2008-11-20

    申请号:US12092764

    申请日:2006-11-10

    IPC分类号: H04B7/14 H04B7/15 H04Q7/20

    摘要: A method and system for wireless communication with a mobile device in which wireless communication is established with the mobile device. A base station is used to transmit directly to the mobile device in a downlink direction. A relay node is used to transmit to the base station communications received in an uplink direction from the mobile station. The relay node relays at least a portion of the uplink traffic received from the mobile station to the base station.

    摘要翻译: 一种与移动设备进行无线通信的方法和系统,其中与移动设备建立无线通信。 基站用于在下行链路方向上直接发送到移动设备。 中继节点用于向基站发送从移动台沿上行方向接收的通信。 中继节点将从移动站接收的上行链路业务的至少一部分中继到基站。

    Methods and Systems for Ofdm Using Code Division Multiplexing
    28.
    发明申请
    Methods and Systems for Ofdm Using Code Division Multiplexing 有权
    Ofdm使用码分复用的方法和系统

    公开(公告)号:US20080253469A1

    公开(公告)日:2008-10-16

    申请号:US11910091

    申请日:2006-03-30

    IPC分类号: H04L27/28

    摘要: In some embodiments of the invention, OFDM symbols are transmitted as a plurality of clusters. A cluster includes a plurality of OFDM sub-carriers in frequency, over a plurality of OFDM symbol durations in time. Each cluster includes data as well as pilot information as a reference signal for channel estimation. In some embodiments, a plurality of clusters collectively occupy the available sub-carrier set in the frequency domain that is used for transmission. In some embodiments of the invention data and/or pilots are spread within each cluster using code division multiplexing (CDM). In some embodiments pilots and data are separated by distributing data on a particular number of the plurality of OFDM symbol durations and pilots on a remainder of the OFDM symbol durations. CDM spreading can be performed in time and/or frequency directions.

    摘要翻译: 在本发明的一些实施例中,OFDM符号作为多个簇发送。 在多个OFDM符号持续时间内,群集包括频率上的多个OFDM子载波。 每个簇包括数据以及作为信道估计的参考信号的导频信息。 在一些实施例中,多个集群共同地占用用于传输的频域中的可用子载波集合。 在本发明的一些实施例中,使用码分多路复用(CDM)在每个簇内扩展数据和/或导频。 在一些实施例中,通过在OFDM码元持续时间的其余部分上分配关于多个OFDM符号持续时间的特定数目和导频上的数据来分离导频和数据。 可以在时间和/或频率方向上执行CDM扩展。