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公开(公告)号：US20100296438A1
公开(公告)日：2010-11-25
申请号：US12469306
申请日：2009-05-20
IPC分类号： H04W72/00
CPC分类号： H04L27/2662 , H04L5/0051 , H04L25/0224 , H04L27/2675
摘要： A method, a system and a receiver device provide timing and frequency correction in a spatial division multiple access (SDMA) system. A timing and frequency correction (TFC) logic/utility obtains a timing error estimate by using pilot symbols on a slot of six tiles. The TFC logic estimates the timing error based on pilot phase differences between unique pairs of tiles when the frequency separation of the tiles is less than a threshold value. When none of the unique pairs of tiles satisfies the threshold value, the TFC logic estimates timing error based on an exhaustive search for each candidate phase error value. The TFC logic performs timing error correction via a timing error estimate based on pilots from the symbols received on each antenna. The TFC logic performs inexplicit frequency error correction according to phase differences based on relative symbol indices.
摘要翻译： 方法，系统和接收机设备在空分多址（SDMA）系统中提供定时和频率校正。 定时和频率校正（TFC）逻辑/效用通过在六个瓦片的时隙上使用导频符号来获得定时误差估计。 当块的频率分离小于阈值时，TFC逻辑基于独特的瓦片对之间的导频相位差来估计定时误差。 当没有唯一的瓦片对满足阈值时，TFC逻辑基于对每个候选相位误差值的详尽搜索来估计定时误差。 TFC逻辑通过基于在每个天线上接收到的符号的导频的定时误差估计来执行定时误差校正。 TFC逻辑根据相对符号索引的相位差执行奇异性频率误差校正。
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公开(公告)号：US08199845B2
公开(公告)日：2012-06-12
申请号：US12469306
申请日：2009-05-20
IPC分类号： H04B7/02 , H04B1/10 , H04B1/26 , H04B1/38 , H04L1/02 , H04L27/28 , H04L27/06 , H04K1/10 , H04J11/00 , H04W4/00 , H04N7/173
CPC分类号： H04L27/2662 , H04L5/0051 , H04L25/0224 , H04L27/2675
摘要： A method, a system and a receiver device provide timing and frequency correction in a spatial division multiple access (SDMA) system. A timing and frequency correction (TFC) logic/utility obtains a timing error estimate by using pilot symbols on a slot of six tiles. The TFC logic estimates the timing error based on pilot phase differences between unique pairs of tiles when the frequency separation of the tiles is less than a threshold value. When none of the unique pairs of tiles satisfies the threshold value, the TFC logic estimates timing error based on an exhaustive search for each candidate phase error value. The TFC logic performs timing error correction via a timing error estimate based on pilots from the symbols received on each antenna. The TFC logic performs inexplicit frequency error correction according to phase differences based on relative symbol indices.
摘要翻译： 方法，系统和接收机设备在空分多址（SDMA）系统中提供定时和频率校正。 定时和频率校正（TFC）逻辑/效用通过在六个瓦片的时隙上使用导频符号来获得定时误差估计。 当块的频率分离小于阈值时，TFC逻辑基于独特的瓦片对之间的导频相位差来估计定时误差。 当没有唯一的瓦片对满足阈值时，TFC逻辑基于对每个候选相位误差值的详尽搜索来估计定时误差。 TFC逻辑通过基于在每个天线上接收到的符号的导频的定时误差估计来执行定时误差校正。 TFC逻辑根据相对符号索引的相位差执行奇异性频率误差校正。
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公开(公告)号：US08179862B2
公开(公告)日：2012-05-15
申请号：US11866075
申请日：2007-10-02
CPC分类号： H04W16/14
摘要： A method for preventing co-channel operation with a radar system includes the steps of setting a state of a first communication channel to active, connecting to a first wireless access point on the first communication channel, passively scanning at least a second communication channel for communication from a second wireless access point, setting a state of the second channel to active if frames are received on the second channel, determining whether an elapsed time since frames were received on at least one of the first channel and the second channel has exceed a predefined value, and in response to the predefined value being exceeded for at least one of the first channel and the second channel, setting the state of a corresponding one of the first channel and the second channel to passive.
摘要翻译： 一种用于防止与雷达系统的同频道操作的方法包括以下步骤：将第一通信信道的状态设置为有效，连接到第一通信信道上的第一无线接入点，被动扫描至少第二通信信道进行通信 从第二无线接入点，如果在第二信道上接收到帧，则将第二信道的状态设置为有效，确定在第一信道和第二信道中的至少一个上是否接收到帧之后的经过时间是否超过预定义 并且响应于对于所述第一通道和所述第二通道中的至少一个超过了所述预定值，将所述第一通道和所述第二通道中的对应的一个的状态设置为被动。
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公开(公告)号：US07583643B2
公开(公告)日：2009-09-01
申请号：US10674984
申请日：2003-09-30
IPC分类号： H04Q7/24
摘要： The application provides an enhanced passive scanning method for a wireless local area network, including the steps of receiving (405) at least one of a beacon signal (342, 348) or a gratuitous probe response (344), updating (435) a site timing table entry in a site timing table based on the received beacon signal (342, 348) or gratuitous probe response (344), setting (445) a scan start time based on entries in the updated site timing table, and determining (450) a power mode for a wireless communication device based on the scan start time. An enhanced passive scanning system (200, 500, 600) and computer usable medium for enhanced passive scanning is also disclosed.
摘要翻译： 该应用提供了一种用于无线局域网的增强的被动扫描方法，包括以下步骤：接收（405）信标信号（342,348）或免费探测响应（344）中的至少一个，更新（435）站点 基于所接收的信标信号（342,348）或免费探测响应（344）在站点定时表中的定时表条目，基于更新站点定时表中的条目设置（445）扫描开始时间，以及确定（450） 基于扫描开始时间的无线通信设备的电源模式。 还公开了一种增强型被动扫描系统（200,500,600）和用于增强被动扫描的计算机可用介质。
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公开(公告)号：US06925309B2
公开(公告)日：2005-08-02
申请号：US10027193
申请日：2001-12-20
CPC分类号： H04W84/08
摘要： To address the need for an apparatus and method for quickly establishing a CDMA dispatch call, the present invention provides for paging mobile stations (e.g., 120-123) to inform them of the call and then starting the dispatch call without waiting for page responses from the call participants. The dispatch call is first transmitted by base sites (e.g., 110-112) of all the service coverage areas (e.g., 101-103) that may have call participants, and then discontinued at those base sites where no page responses are received within a period of time. Thus, the dispatch call is established while “call setup” effectively continues.
摘要翻译： 为了满足用于快速建立CDMA调度呼叫的装置和方法的需要，本发明提供寻呼移动台（例如，120-123）来通知他们该呼叫，然后开始调度呼叫，而不必等待来自 电话参与者。 调度呼叫首先由可能有呼叫参与者的所有服务覆盖区域（例如，101-103）的基站（例如，110-112）发送，然后在那些在 一段的时间。 因此，在“呼叫建立”有效地继续的情况下建立调度呼叫。
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6.发明授权Method and apparatus for selecting communication cells in a wireless communication system 有权用于在无线通信系统中选择通信小区的方法和装置公开(公告)号：US06671515B1
公开(公告)日：2003-12-30
申请号：US09588262
申请日：2000-06-06
IPC分类号： H04Q720
CPC分类号： H04W68/02 , H04W60/04 , H04W72/005
摘要： In a wireless communication system (100) having a plurality of communication cells (115, 117), and a plurality of mobile stations (118) operating within selected ones of the multiple communication cells (115, 117), a method and an apparatus for selecting those communication cells (115, 117). Within each communication cell (115, 117), a base station (112) transmits a message directed to the mobile stations (118), and detects a response indicator in the selected ones of the plurality of communication cells (115, 117). The message may be a broadcast page message transmitted by the base station (112). The response indicator may be an impulse radio-frequency energy transmission generated by the plurality of mobile stations (118) operating within the selected ones of the plurality of communication cells (115, 117). The base station (112) may detect the impulse radio-frequency energy transmission on a control channel or during a predetermined time window period (303, 410, 413, 416) following transmission of the message. The base station (112) directs call traffic to the plurality of mobile stations (118) in the selected ones of the plurality of communication cells (115, 117).
摘要翻译： 在具有多个通信小区（115,117）的无线通信系统（100）和在所述多个通信小区（115,117）的所选择的一个中操作的多个移动站（118）中的方法和装置 选择那些通信单元（115,117）。 在每个通信小区（115,117）内，基站（112）发送指向移动台（118）的消息，并且检测多个通信小区（115,117）中所选择的通信小区中的响应指示符。 消息可以是由基站（112）发送的广播寻呼消息。 响应指示符可以是在多个通信小区（115,117）中选择的多个通信小区中操作的多个移动台（118）产生的脉冲射频能量传输。 基站（112）可以在发送消息之后的预定时间窗周期（303,410,413,416）中检测控制信道上的脉冲射频能量传输。 基站（112）将呼叫业务定向到多个通信小区（115,117）中所选择的一个中的多个移动站（118）。
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7.发明授权Method and apparatus for providing a subscriber record for packet data registration of a mobile station 失效用于提供用于移动台的分组数据注册的用户记录的方法和装置公开(公告)号：US06223035B1
公开(公告)日：2001-04-24
申请号：US08941383
申请日：1997-09-30
IPC分类号： H04Q720
摘要： A communications system for providing packet data service to mobile stations (110) performs registration of the mobile station prior to engaging in packet data service. The registration procedure includes sending a request to register (300) to a DAP (113), transferring (302) subscriber data from a HLR (124) to a D-VLR (126), authenticating (306) the mobile subscriber, selecting a mobile data gateway (116) to service the mobile station, transferring (308) the subscriber data from the D-VLR to the mobile data gateway, and establishing (312) a packet data link between the mobile data gateway and the mobile station.
摘要翻译： 用于向移动台（110）提供分组数据服务的通信系统在参与分组数据服务之前执行移动台的注册。 注册过程包括向DAP（113）发送注册（300）的请求，将（302）用户数据从HLR（124）传送到D-VLR（126），认证（306）移动用户，选择 移动数据网关（116）为移动站服务，将用户数据从D-VLR传送（308）到移动数据网关，并建立（312）移动数据网关与移动台之间的分组数据链路。
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8.发明授权Establishment of multiple low-rate inbound signaling links in CDMA dispatch system 失效在CDMA调度系统中建立多个低速率入站信令链路
公开(公告)号：US6115388A
公开(公告)日：2000-09-05
申请号：US959327
申请日：1997-10-28
CPC分类号： H04W84/08 , H04B7/264 , H04W72/005 , H04W76/02 , Y02B60/50
摘要： A quality dispatch service on a CDMA based wireless system. To achieve spectral efficiency and fast access for follow-up calls, in response to a request by a talkgroup member to have a group call established, the non-requesting (listening-only) members are allowed to establish a low-rate (non-voice) signaling link in the reverse direction (inbound) for the limited purpose of (i) providing forward power control information to the fixed infrastructure; (ii) requesting soft hand-off when required; and (iii) maintaining the correct reverse link power control to allow for fast channel access for a follow-on call. In accordance with the illustrative embodiment, the establishment of low-rate inbound signaling links occurs prior to beginning the voice communications. Because a low-rate signaling link, as contemplated by the present invention, is a non-voice link which signals at a predetermined rate substantially less than that of a full-rate traffic link, proportionately less average power is required for dispatch communications than would otherwise be the case if full-rate traffic links were provided instead to non-talking talkgroup members. The present solution results in less interference to the CDMA system and thus substantially less impact on overall system capacity.
摘要翻译： 基于CDMA的无线系统的质量调度服务。 为了实现频谱效率和对后续呼叫的快速访问，响应于通话组成员要求建立群组呼叫的请求，允许不请求（只听）成员建立低速率（非易失性） 语音）信令链路，用于（i）向固定基础设施提供正向功率控制信息的有限目的（入站）; （ii）在需要时请求软交换; 和（iii）保持正确的反向链路功率控制以允许用于后续呼叫的快速信道接入。 根据说明性实施例，在开始语音通信之前发生低速率入站信令链路的建立。 因为本发明所设想的低速率信令链路是一个非语音链路，它以基本上小于全速率业务链路的预定速率发送信号，相比于调度通信所需的平均功率要小于 否则，如果提供全速率的流量链接，而不是非谈话的谈话组成员。 本解决方案导致对CDMA系统的干扰较少，因此对整个系统容量的影响较小。
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公开(公告)号：US6094429A
公开(公告)日：2000-07-25
申请号：US32885
申请日：1998-03-02
CPC分类号： H04B7/2643
摘要： A communications system (100) has a TDMA signal (110) accessed by one or more mobile stations (104). The TDMA signal carries both circuit switched and packet data service. A packet channel is defined within a packet data frame (208) by assigning time slots not used by other services during the packet data frame to the packet channel. A packet data seed channel (204) is used to anchor the packet channel and steer a mobile station to the packet channel. In the packet data seed channel a dynamic allocation protocol (DCAP) slot (206) appears and carries the packet channel slot assignments for the next occurring packet data frame.
摘要翻译： 通信系统（100）具有由一个或多个移动站（104）访问的TDMA信号（110）。 TDMA信号携带电路交换和分组数据服务。 在分组数据帧（208）中通过将分组数据帧期间其他服务未使用的时隙分配给分组信道来定义分组信道。 分组数据种子信道（204）用于锚定分组信道并将移动台引导到分组信道。 在分组数据种子信道中，动态分配协议（DCAP）时隙（206）出现并且携带用于下一个出现的分组数据帧的分组信道时隙分配。
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10.发明授权Method and apparatus for providing reliable signalling tones in a radio communication system 失效用于在无线电通信系统中提供可靠信令音的方法和装置
公开(公告)号：US5542112A
公开(公告)日：1996-07-30
申请号：US419847
申请日：1995-04-11
摘要： A method of reliably transmitting signalling tones employs a radio communication unit suitable for encoding (303) data packets. The radio has a processor (101) for processing a first signal, which processing is incompatible for use with signalling tones. The radio further includes an input device (110) for providing signals when asserted. In a preferred embodiment, when the processor (101) is enabled to process the first signal, and a user does not assert the input device (110), the radio transmits the processed first signal. On the other hand, when the processor (101) is enabled, and the user asserts the input device (110), the radio transmits (304) repeated data packets, for the duration of the assertion, which identify a particular signalling tone.
摘要翻译： 可靠地发送信令音的方法采用适于编码（303）数据分组的无线电通信单元。 无线电装置具有用于处理第一信号的处理器（101），该处理器与信令音调不兼容。 无线电还包括用于在断言时提供信号的输入设备（110）。 在优选实施例中，当处理器（101）能够处理第一信号并且用户不断言输入设备（110）时，无线电装置发送处理的第一信号。 另一方面，当处理器（101）被使能并且用户断言输入设备（110）时，无线电发送（304）在断言的持续时间内识别特定信令音的重复数据分组。
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