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1.发明授权Triggering handdowns and handoffs of mobile stations between bordering cells of cellular wireless communication systems 有权在蜂窝无线通信系统的接口小区之间触发移动台的切换和切换公开(公告)号：US06771963B1
公开(公告)日：2004-08-03
申请号：US09135191
申请日：1998-08-17
申请人： Terry Si-Fong Cheng , Ching Huang , Yuen-Yin L. Koo , Shen-De Lin , Carl Francis Weaver , Wen-Yi Kuo
发明人： Terry Si-Fong Cheng , Ching Huang , Yuen-Yin L. Koo , Shen-De Lin , Carl Francis Weaver , Wen-Yi Kuo
IPC分类号： H04Q720
CPC分类号： H04W52/242 , H04W36/30
摘要： A procedure for triggering a handdown or a handoff a mobile station served by a base station of a cellular wireless communication system. A tolerable path loss for signal links between the base station and a mobile station located within the base station's cell, is initially determined. A control signal is radiated at a known transmit power level from the base station over its cell. A receive power level threshold is determined for the control signal for reception by the mobile station, according to the transmit power level and the tolerable path loss. A handoff of the mobile station is triggered after deriving the received power level of the control signal at the mobile station, and determining that the received power level is less than the receive power level threshold. In one embodiment, a mobile station reports to a serving base station only after the former determines that the received power level of a control signal from the base station is less than a threshold level initially provided to the mobile station by the base station. The procedure is applicable, e.g., to base station cells of a first CDMA cellular system which cells border on cells of an analog (AMPS) or a second CDMA cellular system.
摘要翻译： 用于触发由蜂窝无线通信系统的基站服务的移动台的切换或切换的过程。 最初确定基站和位于基站小区内的移动台之间的信号链路的可容忍路径损耗。 控制信号以已知的发射功率电平从基站在其小区上辐射。 根据发射功率电平和容许路径损耗，确定移动台接收控制信号的接收功率电平门限。 在移动站获得控制信号的接收功率电平之后触发移动台的越区切换，并确定接收功率电平小于接收功率电平门限。 在一个实施例中，移动台仅在前者确定来自基站的控制信号的接收功率电平小于由基站最初提供给移动台的阈值电平之前才向服务基站报告。 该过程例如适用于第一CDMA蜂窝系统的基站小区，该小区在模拟（AMPS）或第二CDMA蜂窝系统的小区上边界。
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2.发明授权公开(公告)号：US06381235B1
公开(公告)日：2002-04-30
申请号：US09086485
申请日：1998-05-29
IPC分类号： H04B7216
CPC分类号： H04W56/00 , H04J13/0048 , H04J13/18 , H04W8/20 , H04W28/06 , H04W36/18 , H04W48/08 , H04W72/00 , H04W74/0866
摘要： The wireless CDMA system includes a base station which generates a configuration channel as one of the forward control channels. The message slots in the configuration channel only include overhead messages. The base station also generates at least one other forward control channel, but these other forward control channels do not need to include overhead messages in any of their message slots. The mobiles in the system determine the location of the configuration channel from information in a sync channel generated by the base station. By camping onto the configuration channel, a mobile can quickly obtain the overhead parameters in the overhead messages. Because obtaining overhead parameters and keeping an updated version of the overhead parameters is an important factor in overall performance, the significant decrease in overhead message access time provided by the provision of the configuration channel greatly improves performance.
摘要翻译： 无线CDMA系统包括生成作为前向控制信道之一的配置信道的基站。 配置通道中的消息槽只包含开销消息。 基站还生成至少一个其他前向控制信道，但是这些其他前向控制信道不需要在任何消息时隙中包括开销消息。 系统中的移动台根据由基站生成的同步信道中的信息确定配置信道的位置。 通过驻留在配置信道上，移动设备可以快速获取开销消息中的开销参数。 由于获取开销参数并保持开销参数的更新版本是整体性能的重要因素，所以通过提供配置通道提供的开销消息访问时间的显着减少大大提高了性能。
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3.发明授权Method and apparatus for controlling power for variable-rate vocoded communications 有权用于控制可变速率声控通信功率的方法和装置公开(公告)号：US06697343B1
公开(公告)日：2004-02-24
申请号：US09383233
申请日：1999-08-26
IPC分类号： G08C1700
CPC分类号： H04L1/0072 , H04L1/0014 , H04L1/0025 , H04L1/003 , H04L1/0039
摘要： A base station assembles a frame including information bits at a vocoding rate for downlink transmission over a traffic channel as channel bits at a channel rate. The base station places at least one rate-indicating bit at a beginning of the frame for indicating the vocoding rate. The mobile station evaluates the downlink transmission with consideration of the vocoding rate indicated by the at least one rate-indicating bit. The mobile station can determine the vocoding rate by decoding the beginning of the frame to permit power control in less than one frame duration from initial receipt of the frame at the mobile station.
摘要翻译： 一个基站组装一个帧，包括一个声码率的信息比特，用于通过业务信道进行下行链路传输，作为信道速率的信道比特。 基站在帧的开始处放置至少一个速率指示位，用于指示声码率。 考虑到由至少一个速率指示位指示的声码速率，移动站评估下行链路传输。 移动台可以通过解码帧的开始来确定声码速率，从而允许在移动站的初始接收帧的不到一帧的持续时间内进行功率控制。
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公开(公告)号：US07006485B2
公开(公告)日：2006-02-28
申请号：US09990468
申请日：2001-11-21
IPC分类号： H04B7/216
摘要： A method for reducing multiple dominant pilots in a CDMA transmission system comprises linking a transceiver element with a nearby base station for transporting signals between the transceiver element and the nearby base station. Transmitting from the transceiver element forward link signals of a nearby sector associated with the nearby base station. An apparatus is also described.
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公开(公告)号：US07190688B1
公开(公告)日：2007-03-13
申请号：US09157758
申请日：1998-09-21
IPC分类号： H04B7/216
CPC分类号： H04W52/243 , H04W52/50
摘要： A method and apparatus that permits base stations to adaptively set initial power levels in forward link traffic channels (i.e., base station to mobile unit) based on an interference measure, where the interference measure is the difference between the base station transmitted pilot EC/IO and the mobile unit received pilot EC/IO. The interference measure indicates how much interference is present from other base stations in the mobile unit's locale, mobile receiver noise and other similar sources. Call quality and system capacity are optimized since the initial power level is set in accordance with the interference environment. The method of the invention implements the adaptive setting by extracting the mobile unit received pilot EC/IO from the access message transmitted by the mobile unit. The interference measure is then determined and used by the base station to set the initial power level in the forward link traffic channel.
摘要翻译： 一种允许基站基于干扰测量自适应地将前向链路业务信道（即，基站到移动单元）中的初始功率电平设置的方法和装置，其中干扰测量是基站发射导频E
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6.发明授权Method for controlling power for a communications system having multiple traffic channels per subscriber 有权用于每个用户具有多个业务信道的通信系统的电力控制方法公开(公告)号：US06285886B1
公开(公告)日：2001-09-04
申请号：US09349238
申请日：1999-07-08
IPC分类号： H04B700
CPC分类号： H04W52/265 , H04W52/12 , H04W52/146 , H04W52/283
摘要： A power control method of the invention may be applied to downlink power control, uplink power control, or both to support different quality of service levels for multiple channels per a mobile station. The power control method transmits control data between a base station and a multi-channel mobile station on a single communications channel or sub-channel to minimize or reduce overhead traffic from the control data.
摘要翻译： 本发明的功率控制方法可以应用于下行链路功率控制，上行链路功率控制或两者，以支持每个移动站的多个信道的不同服务质量水平。 功率控制方法在单个通信信道或子信道上在基站和多信道移动站之间发送控制数据，以最小化或减少来自控制数据的开销流量。
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7.发明授权Method and apparatus for inter-frequency hand-off in wireless communication systems 失效无线通信系统中频间切换的方法和装置公开(公告)号：US06181943B2
公开(公告)日：2001-01-30
申请号：US09050535
申请日：1998-03-30
IPC分类号： H04Q738
CPC分类号： H04W36/30
摘要： An apparatus and method which, in a wireless communication system, improve the quality of inter-frequency hand-offs from an existing call connection frequency to a new frequency by minimizing oscillating inter-frequency hand-offs between the existing call connection frequency and the new frequency, and by minimizing redundant and unnecessary tuning and searching at the new frequency. The present invention accomplishes this improvement by adding specific threshold comparison values (or triggers) within existing messages and through more robust data reporting, from the mobile unit to the base station, when tuning and searching is performed. Particularly, two comparative triggers provided by the present invention avoid unnecessary tuning and searching in the new frequency, thus reducing voice degradation and the risk of dropped calls while pilot searching in the current frequency. Additionally, an alternative embodiment of the present invention compares received power in the new frequency to the received power in the original frequency. If the received power in the new frequency does not exceed the received power in the original frequency by a specified hysteresis threshold value, then a search of the new frequency is unnecessary and the mobile unit “retunes” to the original frequency.
摘要翻译： 一种在无线通信系统中通过最小化现有呼叫连接频率与新的呼叫连接频率之间的振荡频间切换来提高从现有呼叫连接频率到新频率的频率间切换质量的装置和方法 频率，并且通过最小化在新频率下的冗余和不必要的调谐和搜索。 本发明通过在现有消息中添加特定的阈值比较值（或触发）并且通过在执行调谐和搜索时从移动单元到基站的更鲁棒的数据报告来实现这一改进。 特别地，本发明提供的两个比较触发器避免了在新频率中的不必要的调谐和搜索，从而在当前频率的导频搜索的同时降低了语音恶化和掉话的风险。 此外，本发明的替代实施例将新频率中的接收功率与原始频率中的接收功率进行比较。 如果新频率的接收功率不以原始频率的接收功率超过指定的滞后阈值，则不需要搜索新的频率，并且移动单元“重新调谐”到原始频率。
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8.发明授权Apparatus and method for controlling the transmission power of the forward link of a wireless communication system 失效用于控制无线通信系统的前向链路的发送功率的装置和方法公开(公告)号：US06609007B1
公开(公告)日：2003-08-19
申请号：US09395494
申请日：1999-09-14
IPC分类号： H04Q720
CPC分类号： H04W52/226 , H04W52/143
摘要： A method that adjusts the power level of a set of forward-link signals of a base station responsive to the loading of the forward link as determined by a power level measurement of the signal set. One power level measurement is a pilot fraction of the forward link. Other power level measurements, such as the signal set's power level, can be used, alone or in combination, instead of or in addition to the pilot fraction of the forward link to adjust the power level of the signal set. The power level of the signal set can be changed in any manner, including by scaling it by a scaling factor, or by increasing the power level by a fixed or a variable amount. The power level measurement of the signal set is obtained during a current time period. The scaling factor that will be used in the subsequent time period is determined using the power level measurement. In one embodiment of the invention, the scaling factor can be obtained from a look-up table that is based on the power level measurement. If the cell containing the base station includes several sectors, the power level of the signal set in a sector is adjusted when the power level measurement in that sector indicates that the power level should be adjusted.
摘要翻译： 一种响应于由信号组的功率电平测量确定的正向链路的加载来调整基站的一组前向链路信号的功率电平的方法。 一个功率电平测量是前向链路的导频部分。 可以单独或组合地使用诸如信号组的功率电平的其它功率电平测量，而不是前导链路的导频部分或除了前向链路的导频部分之外，以调整信号集的功率电平。 信号组的功率电平可以以任何方式改变，包括通过缩放比例缩放，或通过将功率电平增加固定或可变量。 在当前时间段期间获得信号组的功率电平测量。 将在后续时间段内使用的缩放因子使用功率电平测量来确定。 在本发明的一个实施例中，可以从基于功率电平测量的查找表中获得缩放因子。 如果包含基站的小区包括几个扇区，则当扇区中的功率电平测量指示应调整功率电平时，调整扇区中设置的信号的功率电平。
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9.发明授权Method and system for controlling forward transmit power in a wireless system 有权在无线系统中控制正向传输功率的方法和系统公开(公告)号：US06496531B1
公开(公告)日：2002-12-17
申请号：US09389080
申请日：1999-09-02
IPC分类号： H04B1713
CPC分类号： H04W52/50 , H04W52/12 , H04W52/146 , H04W52/40
摘要： A method and system for controlling down link transmit power during a soft hand-off in a spread-spectrum wireless system supports independent power control of multiple forward channels to reduce fading. For a soft hand-off, a mobile switching center determines if a forward control channel is transmitted from different sectors of base stations than a forward data channel is. The base stations preferably adjust transmit powers of the forward channels grouped into different physical channels by receiving power control data over the allocated reverse power control channels to compensate for fading of the forward channels during a soft hand-off.
摘要翻译： 用于在扩展频谱无线系统中的软切换期间控制下行链路发射功率的方法和系统支持多个前向信道的独立功率控制以减少衰落。 对于软切换，移动交换中心确定前向控制信道是否从正向数据信道的基站的不同扇区发送。 基站优选地通过在分配的反向功率控制信道上接收功率控制数据来调整分组成不同物理信道的前向信道的发射功率，以补偿在软切换期间前向信道的衰落。
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公开(公告)号：US06487415B1
公开(公告)日：2002-11-26
申请号：US09356816
申请日：1999-07-19
IPC分类号： H04B7216
CPC分类号： H04W52/225 , H04W72/085
摘要： A method that initiates call blocking responsive to a call-quality measurement of the forward link. The call-quality measurement is a measurement of how well a mobile terminal is able to receive the forward link. One call-quality measurement is a pilot fraction of the forward link, which is a ratio of the pilot's power level to the power level of a set of forward-link signals of a base station. Call blocking is initiated when an average pilot fraction is below a pilot-fraction blocking threshold. The pilot's power level is obtained for a time period, and the signal set's power level is obtained for the same time period. The pilot fraction is determined for the time period, and then used to determine the average pilot fraction for the time period. The average pilot fraction for the current time period is based on a pilot fraction for the current time period, and an average pilot fraction for a previous time period. When the average pilot fraction is below the pilot-fraction blocking threshold, call blocking is initiated. The pilot-fraction blocking threshold is preferably based on: 1) the pilot fraction when the base station is at full load; 2) the size, shape, and terrain of the cell; and 3) the aggressiveness of the overload control. In the preferred embodiment, the signal set includes all of the signals generated by the base station, alternatively, the signal set can include fewer than all the signals generated by the base station. If the cell includes several sectors, the call blocking is initiated on a sector basis when the average pilot fraction of the sector is below the pilot-fraction blocking threshold. Other call-quality measurements, such as the forward link's frame error rate, the number of dropped calls, or the Power Measurement Report Message (PMRM), can be used, alone or in combination, instead of or in addition to the pilot fraction of the forward link to determine whether call blocking should be initiated. Determining whether call blocking should be initiated using one of the other call-quality measurements is performed in a similar manner as for the pilot fraction. Initiating call blocking using several call-quality measurements involves initiating call blocking when any one of the call-quality measurements indicates that call blocking should be initiated. Alternatively, call blocking can be initiated when several of the call quality measurements indicate that call blocking should be initiated.
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