公开(公告)号：US20020163894A1

公开(公告)日：2002-11-07

申请号：US09847860

申请日：2001-05-02

Applicant: Tantivy Communications, Inc.

Inventor： Pertti Olavi Alapuranen ,  Kevin P. Johnson ,  Kevin L. Farley

IPC: H04B007/216

CPC classification number: H04W72/042 ,  H04B7/2628 ,  H04W8/26 ,  H04W68/00 ,  H04W72/0446 ,  H04W72/12 ,  H04W76/10

Abstract: A technique for distributing channel allocation information in a demand access communication system. In a preferred embodiment, for use with Code Division Multiple Access (CDMA) type communication, multiple access codes are used that have a defined code repeat period or code epoch. For each such epoch duration, a central controller, such as located at a base station in the case of operating a forward link, determines a schedule of assignment of traffic channels to active terminals for each epoch. For each terminal designated as active during the epoch, an active terminal unit identifier is assigned. For each terminal designated as active during the epoch, the base station assigns a list of active channels for such terminal unit. Prior to the start of each epoch, a channel set up message is sent on one of the forward link channels, such as a paging channel. The channel set up message indicates the terminal unit identifiers and the lists of active channels for epochs of the associated traffic channel(s) that are to follow. At the remote terminal unit, upon receiving a paging channel message, an active terminal identifier is determined from each paging channel message and compared to a previously assigned terminal identifier. On a predetermined subsequent epoch, the indicated active traffic channel, as indicated from the list of active traffic channels indicated by a received paging channel message, are then processed.

Abstract translation: 一种在需求存取通信系统中分配信道分配信息的技术。 在优选实施例中，为了与码分多址（CDMA）型通信一起使用，使用具有定义的码重复周期或码周期的多个接入码。 对于每个这样的历元持续时间，在操作前向链路的情况下，诸如位于基站的中央控制器确定将业务信道分配给每个历元的活动终端的时间表。 对于在时期期间指定为活动的每个终端，分配活动终端单元标识符。 对于在时期期间被指定为活动的每个终端，基站为这样的终端单元分配活动信道列表。 在每个时期的开始之前，在诸如寻呼信道的前向链路信道之一上发送信道建立消息。 信道建立消息指示终端单元标识符和关联的业务信道的时期的活动信道的列表。 在远程终端单元，在接收到寻呼信道消息时，从每个寻呼信道消息确定活动终端标识符，并将其与先前分配的终端标识符进行比较。 在预定的后续时期，从处理由接收到的寻呼信道消息指示的活动业务信道的列表中指示的所指示的活动业务信道被处理。

公开(公告)号：US20020106991A1

公开(公告)日：2002-08-08

申请号：US09777557

申请日：2001-02-05

Applicant: Tantivy Communications, Inc.

Inventor： Lawrence R. Foore ,  Kevin L. Farley

IPC: H04B001/00

CPC classification number: H04W28/08 ,  H04W24/00 ,  H04W76/10 ,  H04W80/00

Abstract: In a TCP/IP network, congestion control techniques such as slow start and congestion avoidance are employed. Such networks include wired and wireless links. However, normal operation of the wireless links exhibit different latencies than those exhibited over the wired link. The protocols employed in the wired network do not lend themselves well to efficient communication over wireless connections, and can cause slow start to be triggered. Determining when a sender will timeout due to non-receipt of an ACK, and intervening with a suppression message having an advertised window of zero to pause the user, are employed to prevent congestion control mechanisms such as slow start and congestion avoidance from activation

Abstract translation: 在TCP / IP网络中，采用诸如缓慢启动和拥塞避免等拥塞控制技术。 这样的网络包括有线和无线链路。 然而，无线链路的正常操作显示出不同于通过有线链路展现的延迟。 有线网络中使用的协议不利于通过无线连接的有效通信，并且可能导致启动缓慢的启动。 确定由于未接收到ACK而发送方将超时，并且介入具有通告窗口为零的抑制消息以暂停用户，以防止拥塞控制机制，例如缓慢启动和拥塞避免从激活

公开(公告)号：US20020118649A1

公开(公告)日：2002-08-29

申请号：US09777555

申请日：2001-02-05

Applicant: Tantivy Communications, Inc.

Inventor： Kevin L. Farley ,  James A. Proctor JR.

IPC: H04J003/24 ,  H04L012/26

CPC classification number: H04W28/0268 ,  H04L1/0015 ,  H04L1/0017 ,  H04L1/18 ,  H04L43/00 ,  H04L43/0829 ,  H04L43/0852 ,  H04L43/087 ,  H04L47/2416 ,  H04L47/2441 ,  H04L65/60 ,  H04L65/80 ,  H04L69/16 ,  H04L69/165 ,  H04L69/18 ,  H04W24/00 ,  H04W28/06 ,  H04W28/18 ,  H04W80/00

Abstract: A packet data system such as a TCP/IP network transmits packets containing a variety of data types along links in the network. Packets are transmitted in a stream between nodes interconnected by the links, which conform to a transport layer protocol such as TCP, UDP, and RSTP, and include wireless links, which transmit packets using a radio frequency (RF) medium. Typical protocols, however, are usually developed to optimize throughput and minimize data error and loss over wired links, and do not lend themselves well to a wireless link. By examining the data in a packet, performance characteristics such as a port number are determined. The performance characteristics indicate the application type, and therefore, the data type, of the packets carried on the connection. Since certain data types, such as streaming audio and video, are more loss tolerant, determination of the data type is used to compute link control parameters for the wireless link that are optimal to the type of data being transmitted over the link.

Abstract translation: 诸如TCP / IP网络的分组数据系统沿着网络中的链路发送包含各种数据类型的分组。 分组在通过链路互连的节点之间的流中传输，所述链路符合诸如TCP，UDP和RSTP之类的传输层协议，并且包括使用射频（RF）介质传输分组的无线链路。 然而，通常开发典型的协议是为了优化吞吐量，并通过有线链路最小化数据错误和损失，并且不适合于无线链路。 通过检查数据包中的数据，确定端口号等性能特征。 性能特征表示连接上携带的分组的应用类型，因此表示数据类型。 由于诸如流音频和视频之类的某些数据类型具有更大的容错能力，所以使用数据类型的确定来计算无线链路的链路控制参数，这些链路控制参数对于通过链路传输的数据类型是最佳的。

公开(公告)号：US20020101839A1

公开(公告)日：2002-08-01

申请号：US09775304

申请日：2001-02-01

Applicant: Tantivy Communications, Inc.

Inventor： Kevin L. Farley ,  James A. Proctor JR.

IPC: H04Q007/00 ,  H04J003/16

CPC classification number: H04L5/0055 ,  H04L1/1854 ,  H04W72/0446 ,  H04W76/10 ,  H04W80/10

Abstract: In an illustrative embodiment of the present invention, a channel is allocated to carry messages from each of multiple subscriber units to a base station. Selected messages generated by a subscriber unit that would otherwise be transmitted over an assigned reverse link traffic channel are instead encoded and transmitted to the base station over a shared reverse link channel. Preferably, the shared reverse link channel is time-slotted and each subscriber unit transmits information to the base station in an assigned time slot so that the base station receiving the messages can identify from which subscriber unit a message is sent. Certain bits in a time slot of the shared channel as set by a subscriber unit can be used to communicate a particular message to the base station. For instance, a single bit that is transmitted in a time slot can be encoded to transmit a substitute message from one of the multiple subscriber units to a base station, where the setting of the bit itself indicates a message type.

Abstract translation: 在本发明的说明性实施例中，分配一个信道以将来自多个用户单元中的每一个的消息传送到基站。 由订户单元生成的否则将通过分配的反向链路业务信道发送的所选择的消息被编码并通过共享反向链路信道发送到基站。 优选地，共享反向链路信道是时隙的，并且每个用户单元在分配的时隙中向基站发送信息，使得接收消息的基站可以从哪个订户单元识别发送消息。 可以使用由用户单元设置的共享信道的时隙中的某些比特来将特定消息传送到基站。 例如，可以编码在时隙中发送的单个比特以将替代消息从多个用户单元之一发送到基站，其中比特本身的设置表示消息类型。

公开(公告)号：US20020183089A1

公开(公告)日：2002-12-05

申请号：US09871154

申请日：2001-05-31

Applicant: TANTIVY COMMUNICATIONS, INC.

Inventor： Howard A. Heller ,  Kevin L. Farley ,  James A. Proctor JR.

IPC: H04Q007/20

CPC classification number: H04W99/00 ,  H04W8/18 ,  H04W76/10

Abstract: An improved arrangement is described for signaling enhanced capabilities of a wireless data communication system to a dual-mode wireless handset seeking access to such capabilities and normally operating in a first (non-enhanced) mode. The arrangement, which is especially advantageous for ascertaining operating mode capabilities of a new cellsite to which the handset is being handed off from an existing cellsite, includes a separate capabilities server that is associated with the system and contains a data base populated with information indicative of such capabilities. The handset generates a suitable query message which is transmitted to the data base in the first mode after the handoff to retrieve the capability information for the new cellsite location. The handset is switched from the first mode to the second (enhanced) mode for post-handoff operation if the retrieved capability information indicates that the new cellsite is capable of operation in the enhanced mode.

Abstract translation: 描述了一种改进的布置，用于将无线数据通信系统的增强能力信令发送到寻求接入这种能力并且通常以第一（非增强）模式操作的双模式无线手持机。 特别有利于确定手机正在从现有小区迁移的新小区的操作模式能力的安排包括与系统相关联的单独的能力服务器，并且包含填充有指示 这样的能力。 手机产生合适的查询消息，该消息在切换之后以第一模式发送到数据库，以检索新小区位置的能力信息。 如果检索到的能力信息指示新小区能够以增强模式操作，则手机从第一模式切换到第二（增强）模式用于切换后操作。

公开(公告)号：US20020103938A1

公开(公告)日：2002-08-01

申请号：US09774545

申请日：2001-01-31

Applicant: Tantivy Communications, Inc.

Inventor： Leslie M. Brooks ,  Kevin L. Farley

IPC: G06F015/16

CPC classification number: H04L69/04 ,  G11B2220/2562 ,  H03M7/30 ,  H03M7/3088 ,  H04L29/06 ,  H04L69/22

Abstract: Compression efficiency is optimized by filtering protocol-specific header and control information of a protocol data unit (PDU) to determine compressibility of the contents of the protocol data unit. Based on the result of the filtering, the state of data link compression is selected for the protocol data unit in a manner optimizing compression efficiency. A filter performing the filtering may access a table having entries with specific media types deemed compression limited and associate individual PDUs to a specific media type. When associating the individual PDUs, the filter typically determines if a given PDU is associated with a previously filtered PDU and, if so, assigns the same state of data link compression for the given PDU as for the previously filtered PDU. The data link compression is disabled if the filter determines the compressibility of the contents of the PDU is determined to be low.

Abstract translation: 通过过滤协议数据单元（PDU）的协议特定报头和控制信息来优化压缩效率，以确定协议数据单元的内容的可压缩性。 基于滤波的结果，以优化压缩效率的方式为协议数据单元选择数据链路压缩的状态。 执行过滤的过滤可以访问具有被认为是压缩限制的特定媒体类型的条目的表并且将各个PDU关联到特定媒体类型。 当关联各个PDU时，滤波器通常确定给定的PDU是否与先前滤波的PDU相关联，并且如果是，则为给定的PDU分配与先前被过滤的PDU相同的数据链路压缩状态。 如果过滤器确定PDU的内容的可压缩性被确定为低，则禁用数据链路压缩。

公开(公告)号：US20020102985A1

公开(公告)日：2002-08-01

申请号：US09773255

申请日：2001-01-31

Applicant: Tantivy Communications, Inc.

Inventor： Carlo Amalfitano ,  Kevin L. Farley

IPC: H04Q007/20

CPC classification number: H04W72/1231 ,  H04W72/1278

Abstract: A technique for coordinating the operation of subscriber units such as in a wireless communications system so that high-probability-of-interference communications do not take place at the same time in adjacent cell sites. A base station becomes aware of expected periods or time slots of high relatively expected interference from remote units operating in a neighboring cell site, and then schedules only low interference level transmissions for its own remote units during such periods. Expected interference information ca be exchanged by base stations directly, through a centralized base station controller-initiated schedule, or by relaying resource load status messages via remote units located near all boundaries.

Abstract translation: 一种用于协调诸如无线通信系统中的用户单元的操作的技术，使得在相邻小区站点中同时不发生高概率干扰通信。 基站意识到来自在相邻小区站点中操作的远程单元的较高相对预期的干扰的期望周期或时隙，并且然后在这样的周期期间仅调度其本身的远程单元的低干扰电平传输。 预期的干扰信息可以由基站直接通过集中式基站控制器发起的调度或者通过位于所有边界附近的远程单元中继资源负载状态消息来进行交换。