公开(公告)号：US6073021A

公开(公告)日：2000-06-06

申请号：US866759

申请日：1997-05-30

申请人： Sarath Kumar ,  Wen-Yi Kuo ,  Kiran M. Rege

发明人： Sarath Kumar ,  Wen-Yi Kuo ,  Kiran M. Rege

IPC分类号： H04W36/18 ,  H04W72/04 ,  H04Q7/20

CPC分类号： H04W36/18 ,  H04B2201/70702 ,  H04W48/08 ,  H04W72/04

摘要： A method for increasing the success rate for soft handoffs, particularly under rapidly fluctuating fading conditions, using traffic channels of active set base stations. In one embodiment of the present invention, increased success rate for soft handoffs is achieved using a candidate base station, in addition to the active set base stations, to transmit a handoff command message to the mobile-telephone. Specifically, the handoff command message is transmitted by the active set base stations over the traffic channels assigned to mobile-telephone for communicating with the active set base stations, and by the candidate base station over the traffic channel assigned to the mobile-telephone for communicating with a primary base station. Additionally, a pilot signal may be transmitted by the candidate base station to enable the mobile-telephone to coherently demodulate the handoff direction message transmitted by the candidate base station.

摘要翻译： 一种使用有源集合基站的业务信道来增加软切换的成功率的方法，特别是在快速波动的衰落条件下。 在本发明的一个实施例中，除了有源集合基站之外，使用候选基站向移动电话发送切换命令消息来实现软切换的增加的成功率。 具体地说，切换命令消息由主动集合基站通过分配给移动电话的业务信道发送，用于与主动设置基站进行通信，并由候选基站通过分配给移动电话的业务信道进行通信 与一个基地台。 此外，候选基站可以发送导频信号，以使得移动电话能够相干地解调由候选基站发送的切换方向消息。

公开(公告)号：US06507568B2

公开(公告)日：2003-01-14

申请号：US08918996

申请日：1997-08-27

申请人： Sarath Kumar ,  Wen-Yi Kuo ,  Kiran M. Rege

发明人： Sarath Kumar ,  Wen-Yi Kuo ,  Kiran M. Rege

IPC分类号： H04Q700

CPC分类号： H04B7/022 ,  H04B1/7115

摘要： A mobile communications system employs extended channel assignment messaging during the call setup portion of a mobile call. As part of the call setup process, a mobile station sends an access request message to a primary base station that includes a list of alternate base stations. As call setup continues, the mobile station employs diversity reception in monitoring the paging channel of three base stations, each selected as a function of the strength of the signal-to-noise ratios of their respective pilot tones.

摘要翻译： 移动通信系统在移动呼叫的呼叫建立部分期间采用扩展信道分配消息。 作为呼叫建立过程的一部分，移动台向包括备用基站列表的主基站发送接入请求消息。 随着呼叫建立的继续，移动台在监视三个基站的寻呼信道时采用分集接收，每个基站作为它们各自的导频音的信噪比的强度的函数来选择。

公开(公告)号：US6097954A

公开(公告)日：2000-08-01

申请号：US920779

申请日：1997-08-29

申请人： Sarath Kumar ,  Wen-Yi Kuo ,  Kiran M. Rege

发明人： Sarath Kumar ,  Wen-Yi Kuo ,  Kiran M. Rege

IPC分类号： H04W36/18 ,  H09K1/00

CPC分类号： H04W36/18

摘要： The present invention increases the success rate of soft handoffs by enhancing the ability of a mobile-telephone to receive a handoff direction message that identifies the traffic channel being assigned to enable a candidate base station to communicate with the mobile-telephone. Specifically, the aforementioned ability of the mobile-telephone is enhanced by using the candidate base station to transmit the handoff direction message on a communication channel belonging to the candidate base station and being listened to by the mobile-telephone. In situations where signals transmitted from active set base stations have a low signal-to-noise ratio at the mobile-telephone, signals transmitted from the candidate base station may have a higher signal-to-noise ratio at the mobile-telephone. In these situations, the transmission of the HD messages from the candidate base station increases the likelihood that a copy of the handoff direction message will be successfully received by the mobile-telephone, thereby enhancing the success rate of soft handoffs.

摘要翻译： 本发明通过增强移动电话接收切换方向消息的能力来增加软切换的成功率，该切换方向消息标识被分配的业务信道，以使候选基站能够与移动电话进行通信。 具体地，通过使用候选基站在属于候选基站的通信信道上发送切换方向消息并由移动电话收听来提高移动电话的上述能力。 在从有源设置基站发送的信号在移动电话处具有低信噪比的情况下，从候选基站发送的信号可能在移动电话处具有较高的信噪比。 在这些情况下，来自候选基站的HD消息的传输增加了移动电话成功地接收到切换方向消息的副本的可能性，从而提高了软切换的成功率。

公开(公告)号：US06952561B1

公开(公告)日：2005-10-04

申请号：US09651849

申请日：2000-08-31

申请人： Sarath Kumar ,  Pantelis Monogioudis ,  Kiran M Rege ,  Ashwin Sampath

发明人： Sarath Kumar ,  Pantelis Monogioudis ,  Kiran M Rege ,  Ashwin Sampath

IPC分类号： H04B1/00 ,  H04B15/00 ,  H04L25/03

CPC分类号： H04L25/03171

摘要： A universal mobile telecommunications system (UMTS) receiver uses Pilot Symbol Assisted Modulation (PSAM) in demodulating a received Binary Phase Shift Keying (BPSK) signal. The UMTS receiver uses a ratio of the transmitted energy per pilot symbol to the transmitted energy per data symbol as an index into a look-up table to return a value for a scale factor for use in demodulation of the received signal, which provides better performance during periods when the fading distribution is unknown.

摘要翻译： 通用移动电信系统（UMTS）接收机在解调接收的二进制相移键控（BPSK）信号中使用导频符号辅助调制（PSAM）。 UMTS接收机使用每个导频符号的发送能量与每个数据符号的发送能量的比率作为查找表中的索引，以返回用于解调接收信号的比例因子的值，这提供更好的性能 在衰落分布未知的期间。

公开(公告)号：US06507572B1

公开(公告)日：2003-01-14

申请号：US09332274

申请日：1999-06-11

申请人： Sarath Kumar ,  Sanjiv Nanda ,  Harvey Rubin ,  Stanislav Vitebskiy

发明人： Sarath Kumar ,  Sanjiv Nanda ,  Harvey Rubin ,  Stanislav Vitebskiy

IPC分类号： H04Q720

CPC分类号： H04W52/143 ,  H04W36/18 ,  H04W52/146 ,  H04W52/40 ,  H04W52/44 ,  H04W52/50

摘要： A back haul architecture enables efficient primary transfer (i.e., transfer of the designation of primary base station from one base station to another). A frame selection/distribution (FSD) function queues packets of forward-link data—to which sequence numbers have been assigned—for packet-mode transmission over the back haul only to one base station—the current primary base station—where the packets are again queued for over-the-air transmission to the mobile unit. If and when it becomes appropriate to transfer the designation of primary base station to another base station, there may still be packets of data queued at the old primary base station awaiting transmission to the mobile unit. The old primary base station sends a message to the new primary base station indicating a particular sequence number that identifies the remaining packets of forward-link data queued at the old primary base station. The new primary base station then sends a message to the FSD function requesting transmission of those packets of forward-link data corresponding to the particular sequence number. The FSD function then transmits those requested packets of forward-link data to the new primary base station, which queues the requested packets for over-the-air transmission to the mobile unit. In this way, transmission of all of the forward-link data to the mobile unit is enabled without having to transmit the remaining queued packets of forward-link data from the old primary base station to the new primary base station over the back haul, thereby providing an efficient mechanism for primary transfer in wireless communications systems that support forward-link data transmissions only in simplex mode.

摘要翻译： 后向架构使得能够有效地进行一次传送（即将主基站的指定从一个基站传送到另一个基站）。 帧选择/分配（FSD）功能将前向链路数据的分组排队到序列号已经被分配的分组模式 - 用于仅在背行上的分组模式传输到一个基站 - 当前主基站 - 其中分组是 再次排队到空中传输到移动单元。 如果当将主基站的指定传送到另一基站变得适当时，仍然可能在旧的主基站处排队等待传输到移动单元的数据分组。 旧的主基站向新的主基站发送消息，指示表示在旧主基站排队的前向链路数据的剩余分组的特定序列号。 然后，新的主基站向FSD功能发送一个请求发送与特定序列号对应的前向链路数据的分组的消息。 然后，FSD功能将所请求的前向链路数据分组发送到新的主基站，该主基站将所请求的分组排队到空中传输到移动单元。 以这种方式，可以使得所有前向链路数据向移动单元的传输得以实现，而无需将后续链路数据的剩余排队分组从旧的主基站传输到新的主基站，从而 提供了一种仅在单工模式下支持前向链路数据传输的无线通信系统中的主要传输的有效机制。

公开(公告)号：US07193981B1

公开(公告)日：2007-03-20

申请号：US09624765

申请日：2000-07-25

申请人： Walid Ahmed ,  Joe Huang ,  Sarath Kumar ,  Sanjiv Nanda ,  Devesh T. Patel ,  Melanie M. Wang

发明人： Walid Ahmed ,  Joe Huang ,  Sarath Kumar ,  Sanjiv Nanda ,  Devesh T. Patel ,  Melanie M. Wang

IPC分类号： H04Q7/00

CPC分类号： H04W36/18

摘要： In the method of processing soft handoff information at a base station, soft handoff information of a mobile station is received at the base station. The soft handoff information indicates at least a number of base stations in an active list of the mobile station. The active list is a list of base stations involved in a call of the mobile station. The base station applies a rules set to the soft handoff information to determine changes in the active list. The rules set requires more stringent conditions be met to add a base station to the active list when the active list includes a first number of base stations as compared to when the active list includes a second number of base stations; wherein the first number is greater than the second number. The determination results are then sent to the mobile station.

摘要翻译： 在基站处理软越区切换信息的方法中，在基站接收移动台的软越区切换信息。 软切换信息指示移动台的活动列表中的至少多个基站。 活动列表是涉及移动台的呼叫的基站的列表。 基站对软切换信息应用规则集以确定活动列表中的变化。 与主动列表包括第二数量的基站相比，当活动列表包括第一数量的基站时，规则集需要更加严格的条件来将基站添加到活动列表; 其中所述第一数量大于所述第二数量。 然后将确定结果发送到移动台。

公开(公告)号：US06212399B1

公开(公告)日：2001-04-03

申请号：US09036153

申请日：1998-03-06

申请人： Sarath Kumar ,  Sanjiv Nanda ,  Lei Song

发明人： Sarath Kumar ,  Sanjiv Nanda ,  Lei Song

IPC分类号： H04B700

CPC分类号： H04W52/221 ,  H04W52/241 ,  H04W52/362

摘要： A technique for controlling the power with which a wireless terminal transmits is disclosed. One embodiment of the present invention comprises: transmitting a first signal at a first power level; receiving a series of n power control signals, bi−n+1 through bi; setting a step size based on a measure of dispersion of the n power control signals; and transmitting a second signal at a second power level that is based on the first power level and the step size.

摘要翻译： 公开了一种用于控制无线终端发射的功率的技术。 本发明的一个实施例包括：以第一功率电平发送第一信号; 接收一系列n个功率控制信号，bi-n + 1到bi; 基于n个功率控制信号的色散测量设置步长; 以及基于所述第一功率电平和所述步长大小的第二功率电平发送第二信号。

公开(公告)号：US06654422B1

公开(公告)日：2003-11-25

申请号：US09312167

申请日：1999-05-14

申请人： Farooq Ullah Khan ,  Douglas N. Knisely ,  Sarath Kumar ,  Kameswara Rao Medapalli ,  Sanjiv Nanda

发明人： Farooq Ullah Khan ,  Douglas N. Knisely ,  Sarath Kumar ,  Kameswara Rao Medapalli ,  Sanjiv Nanda

IPC分类号： H04L2700

CPC分类号： H04L1/1825 ,  H04L1/0023 ,  H04L1/165 ,  H04L1/1671 ,  H04L1/1809

摘要： A variable length sequence number is used to identify data units in a communication channel. The sequence number associated with the most recent data that has been received successfully and the sequence number expected with the next new data message to be received are examined to determine the minimum size sequence number necessary to unambiguously identify to the transmitter incorrectly received data that must be retransmitted in a later message. The receiver provides the transmitter with the sequence number associated with the last successfully received byte of data and the sequence number associated with the next expected byte of data. The receiver communicates this information to the transmitter using a NAK control message. The transmitter then uses the sequence number of the next byte of data to be transmitted and the information received in the control message from the receiver to determine the smallest number of bits necessary to represent the sequence numbers for both data transmissions and the retransmission of data that was not received properly by the receiver.

摘要翻译： 可变长度序列号用于识别通信信道中的数据单元。 检查与已经成功接收的最新数据相关联的序列号以及预期接收到的下一个新数据消息的序列号，以确定明确识别发射机所必需的最小大小序列号，这些数据必须是 在稍后的消息中重传。 接收器向发射机提供与最后成功接收的数据字节相关联的序列号以及与下一个预期数据字节相关联的序列号。 接收机使用NAK控制消息将该信息传送给发射机。 然后，发射机使用要发送的数据的下一字节的序列号和来自接收机的控制消息中接收的信息来确定表示数据传输的序列号所需的最小比特数，并且重传数据的数据， 接收机没有正确接收到。

公开(公告)号：US06418148B1

公开(公告)日：2002-07-09

申请号：US09121149

申请日：1998-07-23

申请人： Sarath Kumar ,  Sanjiv Nanda ,  Stanislav Vitebskiy

发明人： Sarath Kumar ,  Sanjiv Nanda ,  Stanislav Vitebskiy

IPC分类号： H04J316

CPC分类号： H04W72/0413 ,  H04B2201/70703 ,  H04W28/20 ,  H04W72/042 ,  H04W72/0453 ,  H04W74/00 ,  H04W74/04 ,  H04W84/042

摘要： Bursts of additional bandwidth (e.g., one or more supplemental channels or a channel having variable bandwidth) is assigned to users (e.g., high-speed data users) in a cellular telecommunication system. A request for assignment of additional bandwidth may be an initial request, a continuation request for an on-going burst, or a retry request after a previously rejected request. In any case it is determined whether to grant or reject the request. If the request is rejected, instructions are given to submit a retry request after a specified backoff time. The present invention may be implemented using either an asynchronous approach or a synchronous approach. According to the asynchronous approach, all requests are handled asynchronously. According to the synchronous approach, initial requests are handled asynchronously, but continuation requests and retry requests are handled synchronously at epoch times that coincide with specific time slots.

摘要翻译： 附加带宽的突发（例如，一个或多个补充信道或具有可变带宽的信道）被分配给蜂窝电信系统中的用户（例如，高速数据用户）。 分配附加带宽的请求可以是先前拒绝的请求之后的初始请求，持续突发的继续请求或重试请求。 无论如何，确定是否授予或拒绝该请求。 如果请求被拒绝，则在指定的退避时间之后给出指令以提交重试请求。 本发明可以使用异步方法或同步方法来实现。 根据异步方法，所有请求都是异步处理的。 根据同步方法，异步处理初始请求，但是在与特定时隙一致的时代，同步处理继续请求和重试请求。

公开(公告)号：US6069883A

公开(公告)日：2000-05-30

申请号：US841980

申请日：1997-04-08

申请人： Richard Paul Ejzak ,  Subhasis Laha ,  Sarath Kumar ,  Douglas Knisely ,  Sanjiv Nanda ,  Chih-Lin I

发明人： Richard Paul Ejzak ,  Subhasis Laha ,  Sarath Kumar ,  Douglas Knisely ,  Sanjiv Nanda ,  Chih-Lin I

IPC分类号： H04J13/04 ,  H04B7/26 ,  H04L12/28 ,  H04L12/56 ,  H04W16/14 ,  H04W28/22 ,  H04W36/18 ,  H04W72/08 ,  H04W74/00 ,  H04J13/02

CPC分类号： H04W28/22 ,  H04B2201/70703 ,  H04W36/18 ,  H04W72/082

摘要： A code division multiple access system method and apparatus provides for allocation of increased bandwidth to a requesting mobile station. An access controller receives a data burst request (from either a requesting mobile station or from an external network already in connection with the mobile station) requesting a first data rate in excess of the basic data rate B allocated to a mobile station of a first cell. The access controller determines an increased data rate which is to be granted to said mobile station without causing excessive interference at said first cell and at least one adjacent cell and transmits a data burst assignment to a base station of said first cell indicating the increased data rate which has been granted to said mobile station. In another feature, the access controller processes a data burst request received from a mobile station involved in a soft handoff between multiple base stations and negotiates with those base stations for an increased data rate which may be granted to the requesting mobile station. One feature enables additional interactions to further refine the allocation process. A variety of system architectures are also described.

摘要翻译： 码分多址系统方法和装置提供增加带宽的分配给请求移动台。 访问控制器从请求的移动站或已经与移动站连接的外部网络接收请求超过分配给第一小区的移动站的基本数据速率B的第一数据速率的数据突发请求 。 访问控制器确定要被授予所述移动站的增加的数据速率，而不会在所述第一小区和至少一个相邻小区造成过多的干扰，并且向所述第一小区的基站发送指示增加的数据速率的数据突发分配 其被授予所述移动台。 在另一特征中，接入控制器处理从涉及多个基站之间的软切换的移动台接收到的数据突发请求，并与那些基站协商以增加可能被授权给请求移动台的数据速率。 一个功能可以实现其他交互以进一步完善分配过程。 还描述了各种系统架构。