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    • 51. 发明申请
    • SYSTEM AND METHOD FOR FACILITATING CO-CHANNEL AND CO-EXISTENCE VIA ENHANCED FRAME PREAMBLES
    • 通过增强框架前缀来促进共通道和共存的系统和方法
    • US20120044829A1
    • 2012-02-23
    • US13285837
    • 2011-10-31
    • Paul W. PigginSrikanth GummadiRon PoratKenneth L. Stanwood
    • Paul W. PigginSrikanth GummadiRon PoratKenneth L. Stanwood
    • H04W72/04H04W84/00H04L12/28H04W28/00H04L12/26H04W24/00
    • H04W16/14H04W8/005H04W48/12H04W76/10H04W92/20
    • Enhanced frame preambles facilitate co-channel co-existence in a wireless communication environment by having at least one preamble characteristic that connotes channel-sharing information regarding the wireless communication environment. In an exemplary embodiment, a downlink subframe is received in one or more wireless communication signals in a wireless communication environment. A preamble is detected in the downlink subframe, and at least one characteristic of the preamble is ascertained. Channel-sharing information for the wireless communication environment is determined based upon the at least one characteristic of the preamble. In another exemplary embodiment, a channel is scanned to detect secondary preambles being transmitted on the channel. A current preamble configuration, including a permutation of preamble location and preamble content corresponding to the secondary preambles, is determined, which connote channel-sharing information. A next available preamble location may be adopted based on the current preamble configuration.
    • 增强帧前同步码可以通过具有至少一个前导码特征来促进无线通信环境中的共信道共存,该前导码特征意味着关于无线通信环境的信道共享信息。 在示例性实施例中,在无线通信环境中的一个或多个无线通信信号中接收下行链路子帧。 在下行链路子帧中检测到前导码,并且确定前导码的至少一个特征。 基于前导码的至少一个特征来确定用于无线通信环境的信道共享信息。 在另一示例性实施例中,扫描信道以检测正在信道上发送的辅助前同步码。 确定包括前导码位置的置换和对应于次要前导码的前导码内容的当前前置码配置,这意味着信道共享信息。 可以基于当前前置码配置来采用下一个可用的前导码位置。
    • 53. 发明申请
    • METHOD AND SYSTEM FOR ADAPTIVELY OBTAINING BANDWIDTH ALLOCATION REQUESTS
    • 用于自适应获取带宽分配请求的方法和系统
    • US20120033633A1
    • 2012-02-09
    • US13272565
    • 2011-10-13
    • Brian SpinarKenneth L. StanwoodSheldon I. GilbertIsrael Jay KleinJames F. Mollenauer
    • Brian SpinarKenneth L. StanwoodSheldon I. GilbertIsrael Jay KleinJames F. Mollenauer
    • H04W72/04
    • H04W28/20H04W28/06H04W28/18H04W72/0413H04W72/042H04W72/0453H04W74/06
    • A method and apparatus for adaptively obtaining bandwidth requests in a broadband wireless communication system. The method and apparatus includes dynamically varying technique combinations enabling a plurality of users to efficiently request bandwidth from a shared base station. A user may “piggyback” a new bandwidth request upon, or set a “poll-me bit” within, presently allocated bandwidth. A base station may poll users, individually or in groups, by allocating unrequested bandwidth for new requests. Polling may respond to a “poll-me bit,” and/or it may be adaptively periodic at a rate based on communication status parameters, such as recent communication activity and connection QoS levels Group polling permits a possibility of collisions. Polling policies may be established for dynamically varying user groups, or may be determined for each user. Dynamic selection of appropriate polling techniques makes use of efficiency benefits associated with each technique.
    • 一种用于在宽带无线通信系统中自适应地获得带宽请求的方法和装置。 该方法和装置包括动态变化的技术组合,使得多个用户能够有效地从共享基站请求带宽。 用户可以在当前分配的带宽内“搭载”新的带宽请求,或设置“轮询我位”。 基站可以通过为新请求分配未请求的带宽来单独或分组地轮询用户。 轮询可以响应“轮询我位”,和/或可以以基于通信状态参数(例如最近的通信活动和连接QoS等级)的速率自适应地周期性组合轮询允许冲突的可能性。 可以为动态变化的用户组建立轮询策略,或者可以为每个用户确定轮询策略。 适当轮询技术的动态选择利用与每种技术相关的效率优势。
    • 56. 发明申请
    • AUTOMATIC RETRANSMISSION AND ERROR RECOVERY FOR PACKET ORIENTED POINT-TO-MULTIPOINT COMMUNICATION
    • 分组点对多点通信的自动恢复和错误恢复
    • US20110305187A1
    • 2011-12-15
    • US13218078
    • 2011-08-25
    • Subir Varma
    • Subir Varma
    • H04W4/06
    • H04L1/08H04L1/0006H04L1/0025H04L1/1607H04L1/1854H04L1/1867H04L1/1883H04L1/1887H04L2001/0093H04W72/1278
    • Point to multipoint wireless communication, including automatic retransmission and error recovery for packet oriented point to multipoint communication, which integrates adaptive and dynamic responsiveness for parameters for automatic retransmission using wireless communication. A wireless communication link is divided into a downstream portion and an upstream portion. Parameters are selected for automatic retransmission independently for the downstream portion and the upstream portion of the wireless communication link. A BSC controls the selection of parameters for automatic retransmission for all CPE within a cell. As part of a TDD frame, in which the BSC and the CPE share communication bandwidth using a TDMA technique, the BSC includes its selection of parameters for automatic retransmission to be used by CPE within a control section of the TDD frame. The BSC dynamically and adaptively determines new selected parameters for automatic retransmission, in response to conditions of a wireless communication link with each independent CPE. The BSC dynamically and adaptively allocates acknowledgement time slots within the upstream portion of the TDD frame, for use by each selected CPE. The BSC allocates some portion of the upstream bandwidth as a shared resource and some portion of the upstream bandwidth as unshared when there are messages received but not yet acknowledged. The BSC dynamically and adaptively response to acknowledgement and non-acknowledgement messages from each selected CPE, to integrate the automatic retransmission protocol with the TDD frame and the TDMA technique used within that frame.
    • 点对多点无线通信,包括针对分组定向的点对多点通信的自动重传和错误恢复,其对使用无线通信的自动重传的参数进行自适应和动态响应。 无线通信链路被分为下游部分和上游部分。 为无线通信链路的下游部分和上游部分独立地选择参数进行自动重传。 BSC控制单元内所有CPE自动重发参数的选择。 作为其中BSC和CPE使用TDMA技术共享通信带宽的TDD帧的一部分,BSC包括其在TDD帧的控制部分内由CPE使用的自动重传参数的选择。 响应于与每个独立CPE的无线通信链路的条件,BSC动态地并且自适应地确定用于自动重传的新的所选择的参数。 BSC动态地并自适应地在TDD帧的上游部分内分配确认时隙,供每个选择的CPE使用。 当接收到消息但尚未确认时,BSC将上行带宽的一部分分配为共享资源,并将上游带宽的一部分分配为非共享。 BSC动态地并且自适应地响应来自每个选择的CPE的确认和非确认消息,以将自动重传协议与该帧中使用的TDD帧和TDMA技术集成。