公开(公告)号：EP1179910B1

公开(公告)日：2009-07-15

申请号：EP01306134.6

申请日：2001-07-17

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Balachandran, Krishna ,  Chang, Kirk K. ,  Ejzak, Richard Paul ,  Luo, Wei ,  Nanda, Sanjiv

IPC: H04L1/18

CPC classification number: H04L1/1838 ,  H04L1/0068 ,  H04L1/1819 ,  H04L1/189

公开(公告)号：EP1758277A3

公开(公告)日：2007-04-18

申请号：EP06023311.1

申请日：2000-11-27

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Balachandran, Krishna ,  Nanda, Sanjiv ,  Samaras, Konstantinos

IPC: H04B7/26 ,  H04Q7/28

CPC classification number: H04W74/08 ,  H04B7/2643 ,  H04W72/0406

Abstract: A method and system for reducing delay in wireless communications by use of a burst based access and assignment system. The method for setting up a communication channel uses short burst(s) (essentially a slot of a time frame). Time is saved by keeping the uplink and downlink channels flexible and independent of each other. Thus less time is used trying to fit all requests and responses into constrained choices as in previous protocols. The result is less delay to the mobile user and greater usage density for the wireless service provider.

Abstract translation: 一种通过使用基于突发的接入和分配系统来减少无线通信中的延迟的方法和系统。 用于建立通信信道的方法使用短脉冲串（基本上是时间帧的时隙）。 通过保持上行链路和下行链路信道的灵活性和彼此独立性来节省时间。 因此，使用更少的时间来尝试将所有请求和响应都纳入先前协议中的受限选择中。 其结果是移动用户的延迟更少，无线服务提供商的使用密度更高。

公开(公告)号：EP1024622A3

公开(公告)日：2006-02-08

申请号：EP00300356.3

申请日：2000-01-19

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Budka, Kenneth Carl ,  Nanda, Sanjiv ,  Schefczik, Hans-Peter

IPC: H04L1/00

CPC classification number: H04L1/0015 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0017

Abstract: In a wireless data network, such as a General Packet Radio Service (GPRS) network, a transmitter uses one of k coding/modulation schemes for transmitting data. The transmitter initially selects a coding/modulation scheme, C , as a function of carrier-to-interference ratio ( C / I ) measurements. The transmitter then calculates the number of blocks, B , required to transmit a number of data packets, D , using the coding/modulation scheme C . In addition, the transmitter calculates the number of blocks required to transmit the number of data packets, D , for each coding/modulation scheme that is stronger than the selected coding/modulation scheme C . The transmitter finally selects that coding/modulation scheme that results in transmitting the number of data packets D in B blocks using the strongest coding/modulation scheme. As a result, each block is transmitted using the strongest coding/modulation scheme available.

公开(公告)号：EP1115217A3

公开(公告)日：2005-04-13

申请号：EP01300036.9

申请日：2001-01-04

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Chang, Kirk K. ,  Valencia, Enrique Hernandez ,  Luo, Wei ,  Nanda, Sanjiv

IPC: H04B7/26

CPC classification number: H04B7/2656

Abstract: A time division multiplexed communications method and system in which time is divided into a number of frames and each frame is divided into N data bursts. The method and system further has a first multiplexer by which a half rate channel is formed as a series of bursts that occur periodically every N bursts once per frame, a second multiplexer in which a full rate channel is formed as two half rate channels on consecutive timeslots, and a transmitter transmitting the full rate channel from a first wireless station to a second wireless station. The full rate channel provided by two half rate channels on consecutive timeslots yields a significantly larger resource pool available for assignment of communication traffic. For full rate channels, the interleaving 0246/1357 method that is used by the system is just as good as the known 0123/4567 method when ideal frequency hopping is used, and the 0246/1357 method performs better when non-ideal frequency hopping or no frequency hopping is used.

公开(公告)号：EP1322059A2

公开(公告)日：2003-06-25

申请号：EP03006696.3

申请日：2001-06-11

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Das, Arnab ,  Ullah Khan, Farooq ,  Nanda, Sanjiv

IPC: H04L1/18

CPC classification number: H04L1/0016 ,  H04L1/0002 ,  H04L1/0006 ,  H04L1/0007 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/0066 ,  H04L1/0068 ,  H04L1/0075 ,  H04L1/08 ,  H04L1/1812 ,  H04L1/1819 ,  H04L1/1845

Abstract: Disclosed is a method of sub-packet adaptation based on data rate. Specifically, the size of a sub-packet is adapted to a data rate at which the sub-packet is to be transmitted. In one embodiment, the sub-packet is size adapted to the data rate in a format that would allow such size adapted sub-packet to be soft combined with another sub-packet of a same or different size. The size adapted sub-packet may be transmitted prior to or after the other sub-packet.

公开(公告)号：EP1213868A1

公开(公告)日：2002-06-12

申请号：EP01305279.0

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: H04L1/00 ,  H04Q7/38

CPC classification number: H04L1/0022 ,  H04B2201/70703 ,  H04J13/0048 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0025 ,  H04W28/22 ,  H04W72/042 ,  H04W72/0466

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.

Abstract translation: 在系统中提供数据速率确定，其中每个活动腿中的可用功率分数和可用沃尔什码随时间动态地改变。 该方法基于在每个小区看到的组合资源（功率和代码空间）水平来适应速率（调制和编码）。 该方法在满足目标包或帧错误率和正交性的约束的情况下，给出了其资源受限情况下每个小区可支持的速率的最大化。 此外，由于这种基于活动集中的单元格上的组合资源（功率和代码空间）级别的知识的方法，通过移动结果来改进快速小区选择。

公开(公告)号：EP0899906A3

公开(公告)日：2002-03-06

申请号：EP98306614.3

申请日：1998-08-18

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Balachandran, Krishna ,  Kadaba, Srinivas R. ,  Nanda, Sanjiv ,  Ejzak, Richard Paul

IPC: H04L1/20 ,  H04L1/00

CPC classification number: H04L1/006 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/0026 ,  H04L1/0054 ,  H04L1/12 ,  H04L1/20 ,  H04W36/30 ,  H04W72/08

Abstract: In a system and method to measure channel quality in terms of signal to noise ratio for the transmission of coded signals over fading channels, a Viterbi decoder metric for the Maximum Likelihood path is used as a channel quality measure. This Euclidean distance metric is filtered in order to smooth out short term variations. The filtered or averaged metric is a reliable channel quality measure which remains consistent across different coded modulation schemes and at different mobile speeds. The filtered metric is mapped to the signal to noise ratio per symbol using a threshold based scheme. Use of this implicit signal to noise ratio estimate is used for the mobile assisted handoff and data rate adaptation in the transmitter.

公开(公告)号：EP1056238A3

公开(公告)日：2001-10-24

申请号：EP00304059.9

申请日：2000-05-15

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Cloutier, Joseph E. ,  Knisely, Douglas N. ,  Kumar, Sarath ,  Nanda, Sanjiv

IPC: H04L1/16

CPC classification number: H04L1/0068 ,  H04L1/1642 ,  H04L1/1664 ,  H04L1/1809

Abstract: A method for improving the throughput of a communication system by decreasing the amount of time it takes to retransmit information determined to have been erroneous. Information received by an equipment is decoded and subjected to error detection techniques. The equipment performs a data puncture operation on the received information it is currently transmitting to request a retransmission of such received information.

公开(公告)号：EP1063863A2

公开(公告)日：2000-12-27

申请号：EP00304768.5

申请日：2000-06-06

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Kumar, Sarath ,  Nanda, Sanjiv ,  Rubin, Harvey ,  Vitebsky, Stanley

IPC: H04Q7/38

CPC classification number: H04W52/12 ,  H04W36/18 ,  H04W52/54

Abstract: A back haul architecture effectively reduces the reactivation times for both forward-link and reverse-link data transmissions over CDMA wireless communications systems, by relying on packet-mode transmissions over the back haul between a frame selection/distribution (FSD) function and the appropriate base stations for both forward-link data and reverse-link data. In particular, for the forward direction, the FSD function transmits forward-link data only to one base station (i.e., the primary base station), which is solely responsible for controlling the forward-link air interface with the corresponding mobile unit. As such, the forward link always operates in simplex mode for data transmissions, independent of how many base stations are operating in soft handoff for the reverse link with the same mobile unit. For the reverse direction, each base station that receives frames of reverse-link data from the mobile unit, assigns a time tag to the frame, divides the frame into one or more data packets, assigns a different sequence number to each data packet, and transmits the data packets to the FSD function over the back haul, all without first synchronizing time with any other base station that is also operating in reverse-link soft hand-off with that mobile unit. The FSD function (or preferably the radio link protocol (RLP) function) is then responsible for selecting packets of reverse-link data for subsequent processing (e.g., transmission to the network end of the connection). By limiting forward-link data transmissions to simplex mode and using packet-mode transmissions for reverse-link data, the need to first synchronize timing between the various base stations is eliminated for both forward-link and reverse-link data transmissions. As a result, reactivation delays are greatly reduced.

Abstract translation: 甲回程结构，通过在帧选择/分配（FSD）功能和适当之间回程依靠分组模式传输有效地减少用于在CDMA无线通信系统中两个前向链路和反向链路数据传输的再激活时间 基站对于两个前向链路数据和反向链路数据。 特别地，对于前进方向，FSD功能发送前向链路数据仅给一个基站（即，主基站），所有这些是用于控制与移动单元对应正向链路空中接口负责。 如测试，前向链路总是工作在用于数据传输的，独立的许多基站是如何在软越区切换操作，用于与同一移动单元的反向链路的单工模式。 对于反向方向中，每个基站没有接收反向链路的数据帧从所述移动单元，时间标签分配给该帧，将帧划分的一个或多个数据分组，分配不同的序列号到每个数据分组，并 发送数据分组到FSD功能通过回程，所有这些都不第一同步时间与任何其它基站做gibt在反向链路操作软越区切换与移动单元一样。 FSD功能（或优选的无线电链路协议（RLP）功能）是则选择反向链路数据分组用于后续处理（例如，发送到连接的网络端）负责。 通过限制前向链路数据传输，以单工模式和使用分组模式传输反向链路数据时，需要首先同步不同的基站之间的定时被消除对于两个前向链路和反向链路数据传输。 其结果是，再激活延迟大大降低。

公开(公告)号：EP0964548A1

公开(公告)日：1999-12-15

申请号：EP99303686.2

申请日：1999-05-12

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Balachandran, Krishna ,  Ejzak, Richard Paul ,  Nanda, Sanjiv ,  Seth, Shiv Mohan ,  Vitebskiy, Stanislav ,  Waung, William

IPC: H04L12/28 ,  H04L29/06

CPC classification number: H04L29/06 ,  H04L1/0003 ,  H04L1/0025 ,  H04L1/1819 ,  H04L69/32 ,  H04L69/324

Abstract: A system and method of implementing a radio link protocol and dynamic partial echo management for a transaction oriented packet data communication system. A data backlog is described with a media access control layer controller and transmitting a BEGIN protocol data unit transmitted to a receiver. A media access control layer transaction is initiated in response to the transmitting of the BEGIN frame.

Abstract translation: 一种系统和实现用于面向事务处理的分组数据通信系统中的无线电链路协议和动态部分回波管理的方法。一种数据积压，描述与媒体访问控制层控制器和发送BEGIN协议数据单元的反式mitted到接收器。 媒体访问控制层事务处理以响应BEGIN所述帧的发送开始。