公开(公告)号：DE60100981D1

公开(公告)日：2003-11-20

申请号：DE60100981

申请日：2001-06-18

Applicant: LUCENT TECHNOLOGIES INC

Inventor： GOPALAKRISHNAN NANDU ,  KADABA SRINIVAS R ,  ULLAH KHAN FAROOQ ,  NANDA SANJIV ,  SUNAY MEHMET OGUZ ,  SUNDARAM GANAPATHY SUBRAMANIAN

IPC: H04J11/00 ,  H04J13/00 ,  H04L1/00 ,  H04Q7/38

Abstract: Data rate determination is provided in a system where the available power fraction and available Walsh codes in each active leg are dynamically changing over time. This method adapts the rate (modulation and coding) based on the combined resource (power & code space) levels seen at each cell. The method results in maximization of the rate supportable by each cell given their resource constrained situation while meeting the constraints of target packet or frame error rate and orthogonality. Furthermore, improved fast cell selection by the mobile results due to this approach that is based on knowledge of combined resource (power & code space) levels across the cells in the active set.

公开(公告)号：AT343912T

公开(公告)日：2006-11-15

申请号：AT04250917

申请日：2004-02-20

Applicant: LUCENT TECHNOLOGIES INC

Inventor： GOPALAKRISHNAN NANDU ,  RAMAKRISHNA SUDHIR ,  SUNDARAM GANAPATHY SUBRAMANIAN

IPC: H04L29/00 ,  H04B7/005 ,  H04B7/26 ,  H04L1/18 ,  H04W52/16 ,  H04W52/32 ,  H04W52/50 ,  H04Q7/38

Abstract: The capacity of a reverse link is improved by realizing a scheme to effect sharp changes in pilot channel transmit power (PCTP) and data channel to pilot power ratio (DCPR), coordinated with the start of the data channel transmission. The change in pilot power and data channel to pilot power ratio is also applicable to mobiles that use multiple pilots and/or multiple antennas at the transmitter and/or receiver.

公开(公告)号：DE60111189D1

公开(公告)日：2005-07-07

申请号：DE60111189

申请日：2001-11-19

Applicant: LUCENT TECHNOLOGIES INC

Inventor： GOPALAKRISHNAN NANDU ,  KADABA SRINIVAS R ,  RUDRAPATNA ASHOK N ,  SUNDARAM GANAPATHY SUBRAMANIAN

IPC: H04J13/04 ,  H04B7/005 ,  H04W52/26 ,  H04W52/50 ,  H04W72/04 ,  H04W72/12 ,  H04Q7/38

Abstract: Efficient data communication in wireless communication system is provided by using centralized control of data communications, such as packet switched services, over the uplink channel (mobile station (MS) to base station (BS)). A multiple access protocol is used where packet data mobile stations make requests for uplink channel resources. The request messages transmitted by the MSs inform the BS of service parameters. Examples of such service parameters are available transmit power at the MS, the amount of data to transmit and Quality of Service (QoS). The BS then processes the received request messages and performs interference management calculations to determine the portion of the BS's receive power budget that can be allocated to the data user requesting service. These calculations are used to control the amount of interference seen at the base station, to assign a data rate to the user and to aid scheduling algorithms in computing service order priorities. Any scheduling algorithm may be used; for example, scheduling may be based on the amount of data to be transmitted, the age of the data or the service priority associated with the mobile station. The interference control is used to prevent the occurrence of catastrophic levels of interference while maximizing the utilization of resources on the uplink.

公开(公告)号：DE60008701T2

公开(公告)日：2005-02-10

申请号：DE60008701

申请日：2000-12-12

Applicant: LUCENT TECHNOLOGIES INC

Inventor： GOPALAKRISHNAN NANDU ,  RUDRAPATNA ASHOK N ,  SUNDARAM GANAPATHY SUBRAMANIAN

IPC: H04B7/26 ,  H04L1/00 ,  H04L1/08 ,  H04Q7/38

公开(公告)号：AT271286T

公开(公告)日：2004-07-15

申请号：AT03005755

申请日：2001-03-19

Applicant: LUCENT TECHNOLOGIES INC

Inventor： GOPALAKRISHNAN NANDU ,  JOSHI NIRANJAN SUDHIR ,  KADABA SRINIVAS R ,  KOGIANTIS ACHILLES GEORGE ,  RUDRAPATNA ASHOK N ,  SUNAY MEHMET OGUZ ,  SUNDARAM GANAPATHY SUBRAMANIAN ,  VITEBSKY STANLEY

IPC: H04B7/005 ,  H04B7/26 ,  H04W52/22 ,  H04W52/24 ,  H04W52/26 ,  H04W52/34 ,  H04W52/54

Abstract: Disclosed is a method of integrating voice and data services onto a same frequency channel using available transmit power information to determine data rates, wherein the available transmit power information indicates an amount of transmit power available for future data transmissions over one or more data channels. In a "distributed" embodiment, a transmitter or base station transmits, via a forward link, an available power message to a receiver or mobile-telephone indicating an amount of available transmit power at some future time t+z. The mobile-telephone performs signal-to-interference measurements corresponding to the received forward link and received interference, and uses such signal-to-interference measurements and the available power message to determine a data rate that can be supported by the mobile-telephone. Preferably, the determined data rate corresponds to a maximum data rate at which a minimum level of quality of service can be achieved at the mobile-telephone. In a "centralized" embodiment, the mobile-telephone transmits the signal-to-interference measurements to the base station, and the base station determines the data rate based on the available transmit power at future time t+z.

公开(公告)号：AT257988T

公开(公告)日：2004-01-15

申请号：AT01302473

申请日：2001-03-19

Applicant: LUCENT TECHNOLOGIES INC

Inventor： GOPALAKRISHNAN NANDU ,  JOSHI NIRANJAN SUDHIR ,  KADABA SRINIVAS ,  KOGIANTIS ACHILLES GEORGE ,  RUDRAPATNA ASHOK N ,  SUNAY MEHMET OGUZ ,  SUNDARAM GANAPATHY SUBRAMANIAN ,  VITEBSKY STANLEY

IPC: H04B7/005 ,  H04B7/26 ,  H04W52/22 ,  H04W52/24 ,  H04W52/26 ,  H04W52/34 ,  H04W52/54

Abstract: Disclosed is a method of integrating voice and data services onto a same frequency channel using available transmit power information to determine data rates, wherein the available transmit power information indicates an amount of transmit power available for future data transmissions over one or more data channels. In a "distributed" embodiment, a transmitter or base station transmits, via a forward link, an available power message to a receiver or mobile-telephone indicating an amount of available transmit power at some future time t+z. The mobile-telephone performs signal-to-interference measurements corresponding to the received forward link and received interference, and uses such signal-to-interference measurements and the available power message to determine a data rate that can be supported by the mobile-telephone. Preferably, the determined data rate corresponds to a maximum data rate at which a minimum level of quality of service can be achieved at the mobile-telephone. In a "centralized" embodiment, the mobile-telephone transmits the signal-to-interference measurements to the base station, and the base station determines the data rate based on the available transmit power at future time t+z.

公开(公告)号：DE69904525T2

公开(公告)日：2003-09-04

申请号：DE69904525

申请日：1999-02-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： PATEL SARVAR ,  SUNDARAM GANAPATHY SUBRAMANIAN

IPC: G06F7/58 ,  G09C1/00

Abstract: The present invention is a method for outputting larger bit size pseudo-random number zi that is cryptographically secure. Since larger bit size pseudo-random numbers are being outputted, larger bit size segments of messages may be encrypted resulting in a speedier encryption process than encryption processes of the prior art. In one embodiment, the present invention is a pseudo-random number generator defined by a modular exponential function xi = g  <>i-1 mod p. The output of the pseudo-random number generator being a pseudo-random number zi comprising a j-1 bit size segment of xi. The value of j being less than or equal to m-2c (i.e., j≤m-2c). In an embodiment of the present invention, the pseudo-random number zi includes the j least significant bits of xi excluding the least significant bit of xi.

公开(公告)号：CA2357092A1

公开(公告)日：2002-03-11

申请号：CA2357092

申请日：2001-08-30

Applicant: LUCENT TECHNOLOGIES INC

Inventor： SUNAY MEHMET OGUZ ,  JOSHI NIRANJAN SUDHIR ,  SUNDARAM GANAPATHY SUBRAMANIAN ,  RUDRAPATNA ASHOK N ,  VITEBSKY STANLEY ,  KOGIANTIS ACHILLES GEORGE ,  GOPALAKRISHNAN NANDU ,  KADABA SRINIVAS R

IPC: H04B7/005 ,  H04B7/26 ,  H04W52/22 ,  H04W52/24 ,  H04W52/26 ,  H04W52/34 ,  H04W52/54 ,  H04L12/26 ,  H04B17/00 ,  H04L1/20 ,  H04Q7/36

Abstract: Disclosed is a method of integrating voice and data services onto a sam e frequency channel using available transmit power information to determine da ta rates, wherein the available transmit power information indicates an amount of transmit pow er available for future data transmissions over one or more data channels. In a "distributed" embodiment, a transmitter or base station transmits. via a forward link, an available powe r message to a receiver or mobile-telephone indicating an amount of available transmit power at some future time t+z. The mobile-telephone performs signal-to-interference measurements corresponding to the received forward link and received interference, and uses such signal-to- interference measurements and the available power message to determine a data rate that c an be supported by the mobile-telephone. Preferably, the determined data rate corresponds to a maximum data rate at which a minimum level of quality of service can be achieved at the mobile- telephone. In a "centralized" embodiment, the mobile-telephone transmits the signal-to- interference measurements to the base station, and the base station determines the data rate based on the available transmit power at future time t+z.

公开(公告)号：WO2007053302A2

公开(公告)日：2007-05-10

申请号：PCT/US2006040693

申请日：2006-10-16

Applicant: LUCENT TECHNOLOGIES INC ,  PATEL SARVAR ,  RAJKUMAR AJAY ,  SUNDARAM GANAPATHY SUBRAMANIAN

Inventor： PATEL SARVAR ,  RAJKUMAR AJAY ,  SUNDARAM GANAPATHY SUBRAMANIAN

IPC: H04L9/12

CPC classification number: H04L9/12 ,  H04L9/0662 ,  H04L63/0428 ,  H04L2209/80 ,  H04W12/02 ,  H04W80/00

Abstract: The present invention provides a method for encrypting data for transmission over a wireless link. The method includes encrypting at least one block of data, at an air-interface application layer, using an encryption algorithm that receives a cryptosynch as input. The value of the cryptosynch is based on an order of the at least one block of data relative to other blocks of data. The value of the cryptosynch is recoverable by a receiver based on the ordering of the ordering of the blocks of data. The at least one encrypted block of data is transmitted to a receiver that is operable to preserve the order of the at least one block of data relative to the other blocks of data.

Abstract translation: 本发明提供了一种用于加密数据以在无线链路上传输的方法。 该方法包括使用接收密码同步作为输入的加密算法在空中接口应用层处加密至少一个数据块。 密码子的值基于相对于其他数据块的至少一个数据块的顺序。 基于数据块排序的顺序，接收器可以恢复密码同步的值。 所述至少一个加密的数据块被发送到接收机，所述接收机可操作以相对于其他数据块保留所述至少一个数据块的顺序。

公开(公告)号：WO2008002439A3

公开(公告)日：2008-05-02

申请号：PCT/US2007014419

申请日：2007-06-19

Applicant: LUCENT TECHNOLOGIES INC ,  MCCANN PETER JAMES ,  MIZIKOVSKY SEMYON B ,  SUNDARAM GANAPATHY SUBRAMANIAN

Inventor： MCCANN PETER JAMES ,  MIZIKOVSKY SEMYON B ,  SUNDARAM GANAPATHY SUBRAMANIAN

IPC: H04L29/06 ,  H04W80/04

CPC classification number: H04L63/0428 ,  H04L63/061 ,  H04L63/062 ,  H04W12/04 ,  H04W80/04

Abstract: A key distribution scheme is provided, which is useful for establishing, distributing, and maintaining security associations in a Mobile IP network. An authentication server performs an initial validation of a new session and generates a root key which it delivers to the initial access gateway and to the home agent. The initial access gateway and the home agent each independently compute a derivative key available only to themselves. The initial access gateway, acting as proxy for the mobile station, uses the derivative key to sign the Mobile IP registration or binding update transactions, and sends the signed registration or binding update to the home agent for validation. Once the session is established between the mobile station and the home agent, the access gateways act as proxies on behalf of the mobile station to maintain the session mobility. In handoff, the new access gateway acquires the root key as part of the transferred session context. The new access gateway, acting as proxy for the mobile station, computes a new derivative key from the root key and uses it to sign a binding update.

Abstract translation: 提供了一种密钥分发方案，对于在移动IP网络中建立，分发和维护安全关联是有用的。 认证服务器对新会话进行初始验证，并生成一个根密钥，该密钥将传递给初始接入网关和归属代理。 初始接入网关和归属代理各自独立地计算可用于其自身的导数密钥。 作为移动台的代理的初始接入网关使用派生密钥对移动IP注册或绑定更新事务进行签名，并将签名的注册或绑定更新发送到归属代理进行验证。 一旦在移动台和归属代理之间建立会话，接入网关代表移动台充当代理以维持会话移动性。 在切换中，新的接入网关作为传送的会话上下文的一部分获取根密钥。 作为移动台的代理的新的接入网关从根密钥计算新的派生密钥，并使用它来签署绑定更新。