[go: up one dir, main page]

CN100411327C - Apparatus and method for transferring packets in a multi-hop wireless network - Google Patents

Apparatus and method for transferring packets in a multi-hop wireless network Download PDF

Info

Publication number
CN100411327C
CN100411327C CNB028108736A CN02810873A CN100411327C CN 100411327 C CN100411327 C CN 100411327C CN B028108736 A CNB028108736 A CN B028108736A CN 02810873 A CN02810873 A CN 02810873A CN 100411327 C CN100411327 C CN 100411327C
Authority
CN
China
Prior art keywords
intermediate node
node
data packet
communication path
destination
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CNB028108736A
Other languages
Chinese (zh)
Other versions
CN1541466A (en
Inventor
戈文达拉简·科立什纳莫蒂
伊勒·郭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Inc
Original Assignee
Nokia Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Inc filed Critical Nokia Inc
Publication of CN1541466A publication Critical patent/CN1541466A/en
Application granted granted Critical
Publication of CN100411327C publication Critical patent/CN100411327C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1835—Buffer management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/22—Alternate routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/10—Flow control between communication endpoints
    • H04W28/14—Flow control between communication endpoints using intermediate storage
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Small-Scale Networks (AREA)
  • Communication Control (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)

Abstract

本发明公开了一种系统和方法，用于减少无线网络中由于一个或多个无线链路终端或是中间连接节点故障而引发的数据丢失。无线网络包括至少一个中间节点(15)，所述节点具有一个内部缓存器(71)，用于连续不断地缓存那些从源节点(11)传递到目的地节点(21)的数据，所述无线网络建立一条绕过故障节点的替换路径。响应于指示节点故障的差错消息的接收，或是响应于由于无线链路上的数据中断而产生的重传请求，对丢失的数据分组进行局部重传。而没有这种内部缓存的中间节点则用于将请求和消息向上中继到具有内部缓存的节点。

Figure 02810873

The invention discloses a system and method for reducing data loss caused by failure of one or more wireless link terminals or intermediate connection nodes in a wireless network. The wireless network comprises at least one intermediate node (15) having an internal buffer (71) for continuously buffering the data transferred from the source node (11) to the destination node (21), said wireless The network establishes an alternate path around the failed node. Partial retransmission of lost data packets is performed in response to receipt of an error message indicating a node failure, or in response to a retransmission request due to a data interruption on the wireless link. Intermediate nodes without such an internal cache are used to relay requests and messages up to nodes with an internal cache.

Figure 02810873

Description

用于在多跳无线网络中传递分组的设备和方法 Apparatus and method for transferring packets in a multi-hop wireless network

技术领域 technical field

本发明涉及无线通信系统，尤其涉及一种在出现了链路或节点故障的时候减少数据传输损耗的系统和方法。The present invention relates to a wireless communication system, in particular to a system and method for reducing data transmission loss when link or node failure occurs.

背景技术 Background technique

从特性上讲，无线多跳移动网络缺乏明确的架构，由此将会遭受到节点移动以及无线链路中的干扰所引发的频繁的链路故障。这就在确保这种网络中的服务质量(QoS)方面提出了一个问题。如在相关领域所了解的那样，端到端的重传通常不能满足及时传递分组的限期。特别地，多媒体传送是受到数据分组丢失不利影响的应用实例。举例来说，可以在如下应用中发现多跳无线网络，其中包括用于个人区域连网的应用、军事应用、出租车网络、会议室网络，以及紧急事件应用，包括在涉及搜索和救援任务的团体之间或是经由事故现场的救护车操作员与远程医院的医生之间建立的网络来进行协调的“911呼叫”。Characteristically speaking, the wireless multi-hop mobile network lacks a clear architecture and thus suffers from frequent link failures caused by node movement and interference in the wireless link. This poses a problem in ensuring Quality of Service (QoS) in such networks. As is known in the related art, end-to-end retransmissions often cannot meet deadlines for timely delivery of packets. In particular, multimedia delivery is an example of an application that is adversely affected by data packet loss. For example, multi-hop wireless networks can be found in applications including those used for personal area networking, military applications, taxi networks, conference room networks, and emergency applications, including those involving search and rescue missions. Coordinated "911 calls" between groups or via a network established between an ambulance operator at the scene of an accident and a doctor at a remote hospital.

因此，无线移动多跳网络的网络拓扑结构是随着时间而变化的，其中网络节点是移动的，并且将会建立链路，然后则终止所述链路。与有线网络相比，由于无线电链路对干扰更为敏感，因此在这种无线电链路中更有可能发生瞬时故障。因而在这种网络中，路由选择是一个非常困难的问题并且无法为整个通信会话确保一条从源到目的地的路径。Thus, the network topology of a wireless mobile multi-hop network changes over time, where network nodes are mobile and links will be established and then terminated. Transient failures are more likely in radio links than in wired networks because they are more sensitive to interference. Routing is thus a very difficult problem in such networks and it is not possible to ensure a single path from source to destination for the entire communication session.

目前已经采取了若干研究计划来优化多跳网络中的路由协议。在由于传输干扰而引发的节点移动或链路降级造成了链路故障的情况下，这些路由协议将会对源节点到目的节点的路由进行优化。目前已经提出了许多标准，以便使用这种优化过程来建立通信路径。其中一些标准包括为移动系统和减少拥塞来储备功率。同样，目前已经建议改写TCP/UDP，以便在一个多跳网络中传送分组。Several research programs have been undertaken to optimize routing protocols in multi-hop networks. These routing protocols will optimize the route from the source node to the destination node in case of link failure caused by node movement or link degradation caused by transmission interference. A number of standards have been proposed for establishing communication paths using this optimization process. Some of these criteria include reserve power for mobile systems and reduce congestion. Likewise, it has been proposed to rewrite TCP/UDP to transport packets in a multi-hop network.

在本领域，现有研究计划针对的是路由选择问题，但却并未考虑到分组的局部重传和优先化递送。相关领域论述的协议依靠诸如TCP这种更高的层来处理分组丢失。这种方法依赖于丢失分组的端到端重传，同样不适于确保无线多跳网络中的QoS，其中经常发生链路故障，而这会导致过度的延迟。另外，由于从源流到目的地的分组是以相同方式处理的，因此这种方法并未顾及分组传递中的优先化。在一个流中的不同微流可能具有不同递送限期的时候，这种方法并不是最佳方法。而有线网络中的优先传递在相关领域是已知的，但在无线网络中，由于很高的传输错误概率而无法确保准时的传递。Existing research programs in this field address the routing problem, but do not consider localized retransmission and prioritized delivery of packets. Protocols discussed in the related art rely on higher layers such as TCP to handle packet loss. This approach, which relies on end-to-end retransmission of lost packets, is also not suitable for ensuring QoS in wireless multi-hop networks, where link failures often occur, which cause excessive delays. In addition, this approach does not allow for prioritization in packet delivery since packets are processed in the same manner from source flow to destination. This approach is not optimal when different microflows in a stream may have different delivery deadlines. While priority delivery in wired networks is known in the related art, in wireless networks punctual delivery cannot be ensured due to the high probability of transmission errors.

目前需要一种改进的方法，用于在具有很高服务质量的情况下在移动多跳网络中提供及时的分组传递。There is a need for an improved method for providing timely packet delivery in mobile multi-hop networks with very high quality of service.

发明内容 Contents of the invention

本发明源于这样一种观测，那就是可以使用分层网络来把数据分组缓存到传输路径的中间节点，并且局部重传那些丢失的数据分组，由此缓和无线网络中的数据丢失。无线网络是使用一个或多个中间节点形成的，这些节点具有内部缓存器，用于连续不断地缓存那些从源节点传递到目的节点的数据，所述无线网络建立一条绕过故障节点的替换路径，并且响应于错误信息的接收来重传那些丢失的数据分组。如果连接节点没有内部缓存器，那么错误信息将会向上传送到一个节点，所述节点对数据分组加以缓存并且可以提供那些丢失的数据。The present invention stems from the observation that a layered network can be used to buffer data packets to intermediate nodes of a transmission path and locally retransmit those lost data packets, thereby mitigating data loss in wireless networks. A wireless network is formed using one or more intermediate nodes with internal buffers for continuously buffering data that is passed from a source node to a destination node, said wireless network establishing an alternate path around a failed node , and retransmit those lost data packets in response to receipt of error information. If the connecting node does not have an internal buffer, the error information will be passed up to a node that buffers the data packets and can provide those missing data.

附图说明 Description of drawings

在下文中，本发明的描述引用了附图，其中：In the following, the description of the invention refers to the accompanying drawings, in which:

图1是一个显示连接节点所形成的通信路径的无线网络的图示；Figure 1 is a diagram of a wireless network showing communication paths formed by connected nodes;

图2是一个对使用图1的无线网络所进行的数据传输进行描述的流程图；FIG. 2 is a flowchart describing data transmission using the wireless network of FIG. 1;

图3是一个显示了用于缓存经由节点的数据的内部缓存器的图1连接节点的简图；Figure 3 is a diagram of the connected nodes of Figure 1 showing internal buffers for caching data passing through the nodes;

图4是一个显示了用于缓存经由节点的高、正常、低优先级传输缓存器的图1连接节点的简图；FIG. 4 is a diagram showing the connection nodes of FIG. 1 for caching high, normal, and low priority transfer buffers via nodes;

图5是一个更详细描述图2流程图所示的发送未传递数据分组的处理的流程图；Fig. 5 is a flowchart describing in more detail the process of sending undelivered data packets shown in the flowchart of Fig. 2;

图6是一个包含了不具有内部缓存的连接节点的无线网络的图示；Figure 6 is a diagram of a wireless network comprising connected nodes without internal cache;

图7是包含了一个出现故障的无线链路的无线网络的图示；以及Figure 7 is an illustration of a wireless network including a failed wireless link; and

图8是一个对使用图7的无线网络所进行的数据传输加以描述的流程图。FIG. 8 is a flowchart describing data transmission using the wireless network of FIG. 7. FIG.

具体实施方式 Detailed ways

图1显示了一个简单的无线网络10，其中包括源节点11(S)和目的地节点21(D)。无线网络10的用户可以经由一连串中间连接节点而在源节点11与目的地节点21之间建立一条初始通信路径，由此发送数据。出于说明目的，初始通信路径可以包括：从源节点11到第一连接节点或中间节点13(N01)的路径段，到第二中间节点15(N02)的路径段，到第三中间节点17(N03)的路径段，到第四中间节点19(N04)的路径段，然后是到目的地节点21的路径段。初始通信路径可以通过以下链路的串行组合来建立：源节点11与第一中间节点13之间的无线链路31，第一中间节点13与第二中间节点15之间的无线链路33，第二中间节点15与第三中间节点17之间的无线链路35，第三中间节点17与第四中间节点19之间的无线链路37，以及第四中间节点19与目的地节点21之间的无线链路39。Figure 1 shows a simple wireless network 10 comprising a source node 11(S) and a destination node 21(D). A user of the wireless network 10 can send data by establishing an initial communication path between the source node 11 and the destination node 21 via a series of intermediate connection nodes. For purposes of illustration, the initial communication path may include: a path segment from source node 11 to a first connecting node or intermediate node 13 (N 01 ), a path segment to a second intermediate node 15 (N 02 ), to a third intermediate A path segment to node 17 (N 03 ), a path segment to a fourth intermediate node 19 (N 04 ), and then a path segment to destination node 21 . The initial communication path may be established by a serial combination of the following links: a wireless link 31 between the source node 11 and the first intermediate node 13, a wireless link 33 between the first intermediate node 13 and the second intermediate node 15 , the wireless link 35 between the second intermediate node 15 and the third intermediate node 17, the wireless link 37 between the third intermediate node 17 and the fourth intermediate node 19, and the fourth intermediate node 19 and the destination node 21 The wireless link 39 between.

在经由初始通信路径进行数据传输的过程中，一个或多个中间节点13-19有可能会出现故障。举例来说，故障有可能是因为停止连接节点(例如设备故障或断电)操作所引起的，也有可能因为移动节点移出相关无线链路范围所引发，还有可能是因为受影响中间节点的不利传播环境(例如大气降水或湍流)所导致的。因此，中间连接节点的故障将会导致一个或多个无线链路31-39丢失，由此造成初始通信路径中断，继而产生数据丢失或差错。在相关领域中，节点故障的检测是众所周知的，举例来说，所述检测可以使用一种超时机制。During data transmission via the initial communication path, one or more intermediate nodes 13-19 may fail. For example, failures may be caused by out-of-operation of connected nodes (e.g., equipment failure or power outage), by mobile nodes moving out of range of the associated wireless link, or by adverse effects of affected intermediate nodes. caused by the propagation environment (such as atmospheric precipitation or turbulence). Thus, failure of an intermediate connecting node will result in the loss of one or more of the wireless links 31-39, thereby disrupting the original communication path and consequently resulting in data loss or errors. The detection of node failures is well known in the related art, which may use, for example, a timeout mechanism.

本发明方法的操作还可以参考图2的流程图来加以描述，其中在步骤51，初始通信路径是以一种相关领域公知的方法建立的，并且配置了一个数据分组流29，以便根据恰当的协议来进行发送。由于将数据分组流29发送到目的地节点21是经由初始通信路径发起的，因此在数据分组流29中，各个相应数据分组依次经过各个中间节点13-19。如在下文更详细描述的那样，对初始通信路径中的至少一个中间节点进行配置，以便在步骤57使用优先级队列来对可能的局部重传进行缓存。如果初始通信路径完整无损并且在判定块59检测到一个节点故障，那么在步骤61，系统将会等待进行下一次传输，并且在步骤53，系统将会在提供数据分组的时候接收这些数据分组。The operation of the method of the present invention can also be described with reference to the flowchart of FIG. 2, wherein at step 51, an initial communication path is established in a manner known in the relevant art, and a data packet flow 29 is configured so that the protocol to send. Since the sending of the data packet flow 29 to the destination node 21 is initiated via the initial communication path, in the data packet flow 29 each respective data packet in turn passes through each intermediate node 13-19. As described in more detail below, at least one intermediate node in the initial communication path is configured to use a priority queue at step 57 to buffer possible partial retransmissions. If the original communication path is intact and a node failure is detected at decision block 59, then at step 61 the system will wait for the next transmission and at step 53 the system will receive data packets as they are provided.

如果中间节点出现故障，从而导致形成初始通信路径的一个或多个无线链路31-39中断，那么在步骤63将会使用一种相关领域已知的方法来建立一条替换的连接路径，在步骤65，将剩余的未传递数据分组发送到目的地节点21，以便结束数据分组流29的传送。举例来说，如图1虚线所示，如果第三中间节点17出现故障，那么无线链路35和37将会丢失，由此初始通信路径将会中断。第二中间节点15将被告知所述故障并且将会发现一条绕过出现故障的第三中间节点17而到达目的地节点21的替换通信路径。举例来说，这种替换的通信路径可以包括一个第一替换连接节点23(N11)以及第二替换连接节点25(N12)。If an intermediate node fails so that one or more of the wireless links 31-39 forming the initial communication path are interrupted, then at step 63 an alternative connection path will be established using a method known in the relevant art, at step 63 65. Send the remaining undelivered data packets to the destination node 21 in order to end the transmission of the stream 29 of data packets. For example, if the third intermediate node 17 fails, as indicated by the dotted line in Figure 1, then the wireless links 35 and 37 will be lost, whereby the original communication path will be interrupted. The second intermediate node 15 will be notified of the failure and will find an alternative communication path to the destination node 21 bypassing the failed third intermediate node 17 . For example, the alternate communication path may include a first alternate connection node 23 (N 11 ) and a second alternate connection node 25 (N 12 ).

在第二中间节点15与第一替换连接节点23之间可以形成一条新的无线链路41，在第一替换连接节点23与第二替换连接节点25之间可以形成另一条新的无线链路43，并且在第二替换连接节点25与第四中间节点19之间可以形成一条新的无线链路45。然后，如下文更详细描述的那样，剩余的未传递数据分组将会在步骤67发送到目的地节点21。如果在图2的判定块61并未结束传输会话，那么所述操作将会恢复到步骤53，其中将会配置数据分组流29的下一个部分以供发送。A new wireless link 41 can be formed between the second intermediate node 15 and the first replacement connection node 23, and another new wireless link can be formed between the first replacement connection node 23 and the second replacement connection node 25 43, and a new wireless link 45 may be formed between the second replacement connection node 25 and the fourth intermediate node 19. The remaining undelivered data packets will then be sent to the destination node 21 at step 67, as described in more detail below. If the transmission session is not ended at decision block 61 of Figure 2, then the operation will revert to step 53 where the next portion of the data packet stream 29 will be configured for transmission.

在一个优选实施例中，一个或多个中间节点13-19各自包含了至少一个内部缓存器，以便连续不断地缓存那些经过相应连接节点的数据分组。如图3中更详细显示的第二中间节点15所例示的那样，其中包含一个用于保存多个数据分组的内部缓存器71。缓存器71的大小取决于第二中间节点15中可用于此功能的备用存储器数量，并且所述缓存器是由一个或多个因素决定的，其中包括应用的带宽和移动速率。如果有足够的存储器可用，则可以增加缓存器71的大小，以便处理那些经由相应连接节点并且速率相对较高的数据传输，以及容纳那些在发现替换路径的过程中到达的数据分组。In a preferred embodiment, one or more intermediate nodes 13-19 each comprise at least one internal buffer for continuously buffering data packets passing through the corresponding connecting node. As exemplified by the second intermediate node 15 shown in more detail in Figure 3, an internal buffer 71 for holding a plurality of data packets is contained therein. The size of the buffer 71 depends on the amount of spare memory available for this function in the second intermediate node 15 and is determined by one or more factors, including the bandwidth and movement rate of the application. If sufficient memory is available, the size of the buffer 71 can be increased to handle relatively high rate data transfers via the corresponding connecting nodes, as well as to accommodate data packets arriving during the discovery of alternative paths.

缓存器71可以作为一个包含了驻留在第二中间节点15上的一部分存储器的“软件”缓存器来执行，也可作为第二中间节点15中的一个硬件部件来提供，例如RAM。软件缓存器可以通过重新配置节点核心来进行缓存而得到实施。也就是说，重新配置的核心作用于缓存器并对分组的优先次序加以区分，此外还对重传请求做出响应。如本领域众所周知的那样，这种请求将会得到解析，一个或多个分组将会位于一个或多个缓存器中，所述一个或多个分组将会调度到一个外部队列中。作为选择，第二中间节点15可以包含一个可选的处理单元79，以便控制缓存器71中数据分组的标识、保存和重传。举例来说，在发送数据分组29a、29b、……、29n到达无线链路33之上并且向外路由到无线链路35的时候，缓存器71还分别缓存存储器位置71a、71c以及71e的最近发送的数据分组29a、29b、……、29n。缓存器71可以遵循一个先入先出协议。作为选择，缓存可以基于各个流来进行，其中特定流的数据分组取代了同一流中预先缓存的数据分组。The cache 71 may be implemented as a "software" cache comprising a portion of memory residing on the second intermediate node 15, or may be provided as a hardware component in the second intermediate node 15, such as RAM. A software cache can be implemented by reconfiguring the node cores for caching. That is, the reconfigured core acts on buffers and prioritizes packets, and also responds to retransmission requests. Such requests will be resolved, one or more packets will be located in one or more buffers, and the one or more packets will be dispatched to an external queue, as is well known in the art. Alternatively, the second intermediate node 15 may comprise an optional processing unit 79 for controlling the identification, storage and retransmission of data packets in the buffer 71 . For example, when transmitted data packets 29a, 29b, ..., 29n arrive over wireless link 33 and are routed out to wireless link 35, buffer 71 also caches the most recent Sent data packets 29a, 29b, ..., 29n. Buffer 71 may follow a first-in-first-out protocol. Alternatively, caching can be done on a per-flow basis, where data packets of a particular flow replace pre-cached data packets in the same flow.

在优选实施例中，中间节点13-19各自包含了三个内部缓存器，如在图4的第四中间节点19的图示中指示的缓存器73-77所例示的那样，缓存器包含一部分可用存储器或是一个分立的内存芯片。在这种结构中，举例来说，通过提供高优先级缓存器73、正常优先级缓存器75以及低优先级缓存器77，可以使用这三个缓存器73-77而将接收数据分组29a、29b、……、29n分离成不同的传输优先级等级。因此，可以对高优先级缓存器73中的数据分组进行排列，以便使用相关领域已知的方法而在发送低优先级缓存器77的数据分组之前发送所述数据分组。In the preferred embodiment, the intermediate nodes 13-19 each contain three internal buffers, as exemplified by the buffers 73-77 indicated in the illustration of the fourth intermediate node 19 in FIG. Available memory or a discrete memory chip. In this configuration, for example, by providing a high-priority buffer 73, a normal-priority buffer 75, and a low-priority buffer 77, the received data packets 29a, 29b, . . . , 29n are separated into different transmission priority classes. Accordingly, the data packets in the high priority buffer 73 may be arranged to be transmitted before the data packets of the low priority buffer 77 using methods known in the relevant art.

图5是一个提供了图2步骤65所执行操作的更详细描述的流程图。从步骤63开始，举例来说，在步骤81使用连接节点15、23、25和19而如图1所示建立了中间节点15与19之间的替换路径。因此，现在沿着替换路径流动的数据分组也被缓存在替换连接节点23和25中。第四中间节点19是在建立了替换传输路径的情况下进行重新配置的。也就是说，最初在第三中间节点17出现故障之前，数据分组是从第三中间节点17发送到端口19a的，作为替换，在第三中间节点17出现故障之后，所述数据分组是从第二替换连接节点25发送到端口19b的。相关领域技术人员可以了解，重新配置的第四中间节点19是新的传输路径中的第一个下游节点，它位于初始通信路径和替换传输路径之上。在步骤83，当第四中间节点19接收到一个关于同一个流(也就是数据分组流29)的路径建立消息时，第四中间节点19认定第三中间节点17出现了故障并且通过向第二中间节点15告知第四中间节点19接收到哪些数据分组来做出响应。这个操作将被进行，以便避免重传重复的数据分组。FIG. 5 is a flowchart providing a more detailed description of the operations performed at step 65 of FIG. 2 . From step 63, for example, an alternate path between intermediate nodes 15 and 19 is established at step 81 as shown in FIG. 1 using connecting nodes 15, 23, 25 and 19. Data packets now flowing along the alternative path are therefore also buffered in the alternative connection nodes 23 and 25 . The fourth intermediate node 19 is reconfigured with the establishment of an alternative transmission path. That is, initially before the failure of the third intermediate node 17, data packets are sent from the third intermediate node 17 to the port 19a, as an alternative, after the failure of the third intermediate node 17, the data packets are sent from the third intermediate node 17 to the port 19a. The second alternate connection node 25 sends to port 19b. Those skilled in the relevant art can understand that the reconfigured fourth intermediate node 19 is the first downstream node in the new transmission path, and it is located on the original communication path and the replacement transmission path. In step 83, when the fourth intermediate node 19 receives a path establishment message about the same flow (that is, the data packet flow 29), the fourth intermediate node 19 considers that the third intermediate node 17 has failed and sends a message to the second intermediate node 19. The intermediate node 15 informs the fourth intermediate node 19 which data packets are received in response. This operation will be done in order to avoid retransmission of duplicate data packets.

举例来说，如图4所述，数据分组29a和29n是在第三中间节点17出现故障之前到达第四中间节点19的。当第四中间节点19认定重新配置的传输路径(也就是说，来自第二中间节点15的数据分组到达端口19b而不是19a)，一个已经接收到数据分组29a和29n的通知将会发送到第二中间节点15。然后，第二中间节点15进行检查，以便判定第四中间节点19未曾接收到哪些发送给第三中间节点17的数据分组并且判定第四中间节点19并未接收到数据分组29b。For example, as shown in FIG. 4, the data packets 29a and 29n arrive at the fourth intermediate node 19 before the failure of the third intermediate node 17 occurs. When the fourth intermediate node 19 determines the reconfigured transmission path (that is, the data packet from the second intermediate node 15 arrives at port 19b instead of 19a), a notification that the data packets 29a and 29n have been received will be sent to the first Two intermediate nodes 15 . The second intermediate node 15 then checks to determine which data packets sent to the third intermediate node 17 have not been received by the fourth intermediate node 19 and to determine that the fourth intermediate node 19 has not received the data packet 29b.

在步骤85，识别为丢失的数据分组是从初始通信路径中最接近的上游节点获取的，其中目标节点具有经过缓存的相应数据。数据分组29b例示了一个丢失的数据分组，然后从第二中间节点15的缓存器71中检索所述数据分组并且在步骤87借助替换路径将其发送到第四中间节点19。第四中间节点19将数据分组29a、29b和29n传送到目的地节点21。如果适当的传输协议需要有序递送数据分组，那么数据分组29n是在传送了数据分组29a之后才传送到目的地节点21的。或者，如果适当的传输协议不需要有序递送，那么，如果将数据分组29b缓存在高优先级缓存器71中，则先于缓存在低优先级缓存器77中的数据分组29a和29n来发送数据分组29b。另外，在步骤87，数据分组流29的剩余部分是经由替换路径发送的。然后，在图2中，所述操作将会返回到步骤61。At step 85, data packets identified as lost are retrieved from the closest upstream node in the original communication path, where the destination node has the corresponding data cached. The data packet 29 b represents a lost data packet, which is then retrieved from the buffer 71 of the second intermediate node 15 and sent in step 87 to the fourth intermediate node 19 by means of an alternative route. The fourth intermediate node 19 transmits the data packets 29a, 29b and 29n to the destination node 21 . If the appropriate transport protocol requires in-order delivery of data packets, data packet 29n is transmitted to destination node 21 after data packet 29a has been transmitted. Alternatively, if the appropriate transport protocol does not require in-order delivery, then, if buffered in high priority buffer 71, data packet 29b is sent ahead of data packets 29a and 29n buffered in low priority buffer 77 Data packet 29b. Additionally, at step 87, the remainder of the stream of data packets 29 is sent via an alternate path. Then, in FIG. 2 , the operation will return to step 61 .

在图6显示的发明方法的一个替换实施例中，无线网络10包括一个没有缓存的中间节点27，其中并未在中间节点27为内部缓存器提供存储器资源。因此，中间节点27无法缓存那些沿着传输路径传递的数据分组。然而，中间节点27能够向上游传递消息并且能在节点或链路出现故障的情况下发现替换路径。如果如上所述，诸如第三中间节点17这样的中间节点出现故障，那么中间节点27将会接收到一个重传消息49。由于中间节点27不能响应于节点故障来提供丢失的数据分组，因此，举例来说，重传消息49将会向上发送到具有内部缓存器的下一个中间节点，例如第一中间节点13。诸如例示所示的数据分组29b这样的一个或多个丢失的数据分组是从任何一个缓存器73-77中获取的，并且将其提供给请求节点，在这里所述节点是通过第四中间节点19来例示的。如果丢失的数据分组29b并不存在于第一中间节点13的任何一个缓存器73-77之中，那么所述消息将会发送到源节点11。在一种网络结构中，故障节点与源节点11之间并不存在中间节点并且源节点11包含内部缓存器，那么如上所述，丢失的数据分组是从源节点11中获取并且发送到请求节点的。In an alternative embodiment of the inventive method shown in FIG. 6, the wireless network 10 includes an intermediate node 27 without buffering, wherein no memory resource is provided at the intermediate node 27 for an internal buffer. Therefore, the intermediate node 27 cannot buffer those data packets passing along the transmission path. However, intermediate nodes 27 are able to pass messages upstream and can discover alternate paths in the event of a node or link failure. If, as mentioned above, an intermediate node such as the third intermediate node 17 fails, then the intermediate node 27 will receive a retransmission message 49 . Since the intermediate node 27 cannot provide missing data packets in response to a node failure, the retransmission message 49 will be sent up to the next intermediate node having an internal buffer, eg the first intermediate node 13, for example. One or more missing data packets, such as the illustrated data packet 29b, are retrieved from any one of the buffers 73-77 and provided to the requesting node, where the node is via a fourth intermediate node 19 to illustrate. If the missing data packet 29b is not present in any of the buffers 73-77 of the first intermediate node 13, then the message will be sent to the source node 11. In a network structure, there is no intermediate node between the faulty node and the source node 11 and the source node 11 contains an internal buffer, then as described above, the lost data packet is retrieved from the source node 11 and sent to the requesting node of.

在另一个替换实施例中，举例来说，无线网络10中的无线链路37由于图7所示的传输介质干涉而变得降级或不可靠。由此可能已经在第三中间节点17与第四中间节点19之间的分组传输中引入了差错。在这里可以附加参考图8的流程图来描述校正作用，其中在步骤91建立了初始通信路径，并且在步骤93，在中间节点接收那些来自数据分组流29的数据分组，并且在步骤95将其缓存。In another alternative embodiment, for example, wireless link 37 in wireless network 10 becomes degraded or unreliable due to transmission medium interference as shown in FIG. 7 . Errors may thus have been introduced in the packet transmission between the third intermediate node 17 and the fourth intermediate node 19 . The corrective action may be described here with additional reference to the flowchart of FIG. cache.

如果无线链路31-39仍有作用，则在判定块99并未接收到重传消息，并且在步骤101，系统将会等待进行发送。当无线链路37变得不可靠并且产生传输差错时，将会接收到一个重传消息，并且在步骤103，第三中间节点17在内部缓存器73-77中搜索相应的数据分组。在判定块105，如果在其中一个缓存器73-77中发现了数据分组，那么在步骤97，第三中间节点17将会把用于优先级重传的数据分组调度到外部队列中(未示出)。如上所述，这个传输调度是根据数据分组的传输优先级来执行的。If the wireless link 31-39 is still active, then at decision block 99 no retransmission message has been received and at step 101 the system will wait to transmit. When the wireless link 37 becomes unreliable and a transmission error occurs, a retransmission message will be received and in step 103 the third intermediate node 17 searches the internal buffers 73-77 for the corresponding data packet. At decision block 105, if a data packet is found in one of the buffers 73-77, then at step 97, the third intermediate node 17 will schedule the data packet for priority retransmission into an external queue (not shown) out). As mentioned above, this transmission scheduling is performed according to the transmission priority of the data packets.

在判定块105，如果没有在第三中间节点17的内部缓存器73-77中发现所需要的数据分组，那么在步骤107，下一个上游节点将会检查所请求的替换数据。如果在判定块109发现了所请求的数据，则在步骤97发送所述数据。如果在判定块109并未发现所请求的数据，则在判定块111做出一个是否已经达到源节点11的查询。如果并未达到源节点11，则操作进行到判定块105。如果在判定块111已经达到了源节点11并且在判定块113并未包含所需要的数据分组，那么在步骤115，可以将一个可选的错误消息发布给数据传输的始发站，并且在步骤101，操作将会进行到等待下一个传输会话。如果在判定块113，所请求的数据分组是可用的，则在步骤97对数据分组进行调度和优先化，以便将其发送到目的地节点21。At decision block 105, if the required data packet is not found in the internal buffer 73-77 of the third intermediate node 17, then at step 107 the next upstream node will check for the requested replacement data. If at decision block 109 the requested data is found, then at step 97 the data is sent. If at decision block 109 the requested data is not found, then at decision block 111 a query is made as to whether the source node 11 has been reached. If the source node 11 has not been reached, then operation proceeds to decision block 105 . If the source node 11 has been reached at decision block 111 and does not contain the desired data packet at decision block 113, then at step 115 an optional error message can be issued to the originating station of the data transmission, and at step 101, the operation will proceed to waiting for the next transmission session. If at decision block 113 the requested data packet is available, then at step 97 the data packet is scheduled and prioritized for transmission to the destination node 21 .

虽然已经参考特定实施例而对本发明进行了描述，但是应该了解，本发明决不局限于这里公开和/或图中显示的特定结构和方法，而是包含了权利要求范围内的任何修改或等价物。Although the present invention has been described with reference to specific embodiments, it should be understood that the present invention is in no way limited to the specific structures and methods disclosed and/or shown in the drawings, but includes any modifications or equivalents within the scope of the claims .

Claims (26)

1. 一种在无线网络中将数据分组从源节点传送到目的地节点的方法，包括：1. A method of transmitting data packets from a source node to a destination node in a wireless network, comprising: 建立一条从源节点(11)通过多个中间节点到目的地节点(21)的初始通信路径；establishing an initial communication path from the source node (11) to the destination node (21) through a plurality of intermediate nodes; 从所述多个中间节点中的第一中间节点(27)发送数据分组(29a)到目的地节点(21)；sending a data packet (29a) from a first intermediate node (27) of said plurality of intermediate nodes to a destination node (21); 确定所述目的地节点(21)是否接收到所述数据分组(29a)；determining whether said destination node (21) has received said data packet (29a); 响应于确定所述目的地节点(21)没有接收到所述数据分组(29a)，确定所述数据分组(29a)是否缓存在所述第一中间节点(27)中；以及in response to determining that the data packet (29a) has not been received by the destination node (21), determining whether the data packet (29a) is buffered in the first intermediate node (27); and 响应于确定所述数据分组(29a)没有缓存在所述第一中间节点(27)中，请求通过不同于所述初始通信路径的第一替换通信路径从第一中间节点(27)上游的第二中间节点(13)重传所述数据分组(29a)。Responsive to determining that said data packet (29a) is not buffered in said first intermediate node (27), requesting a second communication link upstream from first intermediate node (27) via a first alternate communication path different from said initial communication path Two intermediate nodes (13) retransmit said data packet (29a). 2. 权利要求1的方法，其中所述第二中间节点包括多个缓存器(71)，所述多个缓存器(71)中的每个对应于不同的优先级等级。2. The method of claim 1, wherein said second intermediate node comprises a plurality of buffers (71), each of said plurality of buffers (71) corresponding to a different priority level. 3. 权利要求2的方法，还包括响应于确定所述数据分组(29a)缓存在所述第一中间节点(27)中，从第一中间节点(27)通过第二替换通信路径重传所述数据分组(29a)。3. The method of claim 2, further comprising retransmitting the data packet (29a) from the first intermediate node (27) over a second alternate communication path in response to determining that the data packet (29a) is cached in the first intermediate node (27). The above data packet (29a). 4. 权利要求1的方法，还包括当所述数据分组(29a)在初始通信路径上经过时在第一中间节点的第一缓存器中缓存所述数据分组(29a)。4. The method of claim 1, further comprising buffering said data packet (29a) in a first buffer of a first intermediate node as said data packet (29a) traverses the initial communication path. 5. 权利要求4的方法，其中所述初始通信路径包括第一中间节点(27)下游的第三中间节点(17)。5. The method of claim 4, wherein said initial communication path includes a third intermediate node (17) downstream of the first intermediate node (27). 6. 权利要求5的方法，其中确定所述目的地节点(21)是否接收到所述数据分组(29a)包括检测第三中间节点(17)的故障。6. The method of claim 5, wherein determining whether the data packet (29a) is received by the destination node (21) comprises detecting a failure of a third intermediate node (17). 7. 权利要求3的方法，其中从第一中间节点(27)重传所述数据分组(29a)是根据输出队列中的优先级等级来调度的。7. The method of claim 3, wherein retransmission of said data packets (29a) from the first intermediate node (27) is scheduled according to a priority level in an output queue. 8. 权利要求3的方法，其中从第一中间节点(27)通过第二替换通信路径重传所述数据分组(29a)包括在所述第一中间节点处在发送缓存在比第一缓存器优先级低的第二缓存器中的第二数据分组(29b)之前重传所述数据分组(29a)。8. The method of claim 3, wherein retransmitting the data packet (29a) from the first intermediate node (27) via the second alternative communication path comprises buffering at the first intermediate node at a time when the sending buffer is larger than the first buffer Said data packet (29a) is retransmitted before the second data packet (29b) in the second buffer with lower priority. 9. 权利要求8的方法，其中所述第二替换通信路径不包括第三中间节点(17)。9. The method of claim 8, wherein said second alternative communication path does not include a third intermediate node (17). 10. 权利要求6的方法，其中检测第三中间节点(17)的故障包括接收重传消息。10. The method of claim 6, wherein detecting failure of the third intermediate node (17) includes receiving a retransmission message. 11. 权利要求6的方法，其中所述第一替换通信路径不包括第三中间节点(17)。11. The method of claim 6, wherein said first alternative communication path does not include a third intermediate node (17). 12. 权利要求6的方法，其中所述初始通信路径还包括位于第三中间节点(17)和目的地节点(21)之间的第四中间节点(19)。12. The method of claim 6, wherein said initial communication path further includes a fourth intermediate node (19) located between the third intermediate node (17) and the destination node (21). 13. 权利要求12的方法，还包括在第一中间节点(27)处从第四中间节点(19)接收丢失分组的通知。13. The method of claim 12, further comprising receiving, at the first intermediate node (27), notification of the lost packet from the fourth intermediate node (19). 14. 一种将数据分组从源节点传送到目的地节点的无线通信网络，包括：14. A wireless communication network for transmitting data packets from a source node to a destination node, comprising: 源节点(11)；source node (11); 目的地节点(21)；destination node (21); 多个中间节点，其中，通过多个中间节点中的至少第一中间节点(27)和第二中间节点(13)在源节点(11)和目的地节点(21)之间建立初始通信路径，所述第二中间节点(13)在第一中间节点(27)的上游，a plurality of intermediate nodes, wherein an initial communication path is established between the source node (11) and the destination node (21) through at least a first intermediate node (27) and a second intermediate node (13) of the plurality of intermediate nodes, said second intermediate node (13) is upstream of the first intermediate node (27), 其中，响应于第一中间节点确定通过初始通信路径发送的数据分组(29a)未能到达目的地节点(21)，如果所述数据分组(29a)没有缓存在第一中间节点(27)中，则第一中间节点(27)发送重传请求给第二中间节点(13)，以及Wherein, in response to the first intermediate node determining that a data packet (29a) sent via the initial communication path fails to reach the destination node (21), if said data packet (29a) is not buffered in the first intermediate node (27), Then the first intermediate node (27) sends a retransmission request to the second intermediate node (13), and 其中，第二中间节点(13)从第二中间节点(13)的第一缓存器(73)沿不同于所述初始通信路径的替换通信路径重传所述数据分组(29a)。Wherein the second intermediate node (13) retransmits said data packet (29a) from the first buffer (73) of the second intermediate node (13) along an alternative communication path different from said initial communication path. 15. 权利要求14的通信网络，其中，配置第一中间节点(27)以通过检测多个中间节点中第三中间节点(17)的故障来确定数据分组(29a)是否到达了目的地节点(21)，其中，所述第三中间节点(17)在第一中间节点(27)下游。15. The communication network of claim 14, wherein the first intermediate node (27) is configured to determine whether the data packet (29a) has reached the destination node ( 21) wherein said third intermediate node (17) is downstream of the first intermediate node (27). 16. 权利要求14的通信网络，其中，位于第三中间节点(17)和目的地节点(21)之间的第四中间节点(19)通知所述第一中间节点(27)丢失分组。16. The communication network of claim 14, wherein a fourth intermediate node (19) located between the third intermediate node (17) and the destination node (21) informs the first intermediate node (27) of a lost packet. 17. 权利要求15的通信网络，其中，所述替换通信路径不包括所述第三中间节点(17)。17. The communication network of claim 15, wherein said alternative communication path does not include said third intermediate node (17). 18. 权利要求14的通信网络，其中，所述第二中间节点(13)还包括第二缓存器(75)，其具有与第一缓存器(73)不同的优先级等级。18. The communication network of claim 14, wherein said second intermediate node (13) further comprises a second buffer (75) having a different priority level than the first buffer (73). 19. 权利要求18的通信网络，其中，根据优先级等级来调度所述数据分组(29a)的重传。19. The communication network of claim 18, wherein retransmission of said data packets (29a) is scheduled according to a priority level. 20. 一种在无线网络中将数据分组从源节点传送到目的地节点的方法，包括：20. A method of transmitting data packets from a source node to a destination node in a wireless network, comprising: 在第一中间节点处从上游节点接收数据分组(29a)；receiving a data packet from an upstream node at a first intermediate node (29a); 在第一中间节点处缓存所述数据分组(29a)；caching said data packets (29a) at a first intermediate node; 沿一条初始通信路径将所述数据分组(29a)发送到第二中间节点；sending said data packet (29a) to a second intermediate node along an initial communication path; 从第二中间节点接收重传请求，其中所述重传请求指示所述数据分组(29a)没有缓存在所述第二中间节点中；以及receiving a retransmission request from a second intermediate node, wherein the retransmission request indicates that the data packet (29a) is not buffered in the second intermediate node; and 响应于所述重传请求，通过一条替换通信路径重传所述数据分组(29a)，所述替换通信路径从第一中间节点开始，并且不同于初始通信路径。In response to said retransmission request, said data packet is retransmitted (29a) via an alternate communication path that begins at the first intermediate node and is different from the original communication path. 21. 权利要求20的方法，其中，所述第一中间节点包括多个缓存器，每个缓存器对应于不同的优先级等级。21. The method of claim 20, wherein the first intermediate node includes a plurality of caches, each cache corresponding to a different priority level. 22. 权利要求21的方法，其中，所述数据分组缓存在根据该数据分组的第一优先级等级而从所述多个缓存器中选择的第一缓存器中。22. The method of claim 21 , wherein said data packet is buffered in a first buffer selected from said plurality of buffers according to a first priority level of the data packet. 23. 权利要求20的方法，其中，所述上游节点是源节点(11)。23. The method of claim 20, wherein said upstream node is a source node (11). 24. 权利要求20的方法，其中，缓存所述数据分组(29a)在接收重传请求之前进行。24. The method of claim 20, wherein buffering the data packets (29a) occurs prior to receiving a retransmission request. 25. 权利要求20的方法，其中，所述重传请求对应于位于第二中间节点和目的地节点之间的第三中间节点(17)的故障。25. The method of claim 20, wherein the retransmission request corresponds to a failure of a third intermediate node (17) located between the second intermediate node and the destination node. 26. 权利要求25的方法，其中，所述替换通信路径不包括第三中间节点(17)。26. The method of claim 25, wherein said alternative communication path does not include a third intermediate node (17).
CNB028108736A 2001-06-30 2002-06-26 Apparatus and method for transferring packets in a multi-hop wireless network Expired - Fee Related CN100411327C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US89578501A 2001-06-30 2001-06-30
US09/895,785 2001-06-30

Publications (2)

Publication Number Publication Date
CN1541466A CN1541466A (en) 2004-10-27
CN100411327C true CN100411327C (en) 2008-08-13

Family

ID=25405094

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB028108736A Expired - Fee Related CN100411327C (en) 2001-06-30 2002-06-26 Apparatus and method for transferring packets in a multi-hop wireless network

Country Status (8)

Country Link
EP (1) EP1415424A4 (en)
JP (2) JP2004537206A (en)
CN (1) CN100411327C (en)
AU (1) AU2002311547B2 (en)
CA (1) CA2449532A1 (en)
MX (1) MXPA03010849A (en)
RU (1) RU2298289C2 (en)
WO (1) WO2003005629A1 (en)

Families Citing this family (179)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6717927B2 (en) 2002-04-05 2004-04-06 Interdigital Technology Corporation System for efficient recovery of node B buffered data following serving high speed downlink shared channel cell change
US7706405B2 (en) 2002-09-12 2010-04-27 Interdigital Technology Corporation System for efficient recovery of Node-B buffered data following MAC layer reset
KR100498932B1 (en) * 2002-12-30 2005-07-04 삼성전자주식회사 Apparatus and method for session establishment in radio network organized mobile nodes
KR20050114654A (en) * 2003-03-13 2005-12-06 소니 가부시끼 가이샤 Radio ad hoc communication system, terminal, processing method in the terminal, and program causing the terminal to execute the method
JP4539231B2 (en) * 2004-08-24 2010-09-08 Ｋｄｄｉ株式会社 Communication method and base station using automatic retransmission control in multi-hop communication
JP2006115354A (en) * 2004-10-15 2006-04-27 Ntt Docomo Inc Mobile terminal, control device, and mobile communication method
TW200614759A (en) * 2004-10-21 2006-05-01 Iwics Inc Implied acknowledgement data transport protocol for a multi-station network
WO2006085270A1 (en) * 2005-02-14 2006-08-17 Koninklijke Philips Electronics N.V. Fault tolerant communication system
JP4520350B2 (en) * 2005-03-31 2010-08-04 株式会社国際電気通信基礎技術研究所 Wireless device
CN1941734A (en) * 2005-09-26 2007-04-04 华为技术有限公司 Method and system for controlling fault based on transfer station
DE102006004025A1 (en) * 2006-01-27 2007-08-09 Siemens Ag Method for transmitting a message, network node and network
JP2007318497A (en) * 2006-05-26 2007-12-06 Oki Electric Ind Co Ltd Wireless access controller and control method, wireless unit, and network
CN101047431B (en) * 2006-06-22 2011-02-02 华为技术有限公司 Method for implementing mixed automatic retransmit in communication system containing repeater station
CN102082651B (en) * 2006-06-22 2013-01-30 华为技术有限公司 Method for Realizing Hybrid Automatic Repeat Transmission in Communication System Containing Relay Station
JP2008072521A (en) * 2006-09-14 2008-03-27 Fujitsu Ltd COMMUNICATION DEVICE, COMMUNICATION METHOD, AND COMMUNICATION PROGRAM
CN100438456C (en) * 2006-10-20 2008-11-26 北京邮电大学 Hop-by-hop transferred distributed flow media transmission performance test method and device
CN101174930B (en) * 2006-11-03 2012-01-04 华为技术有限公司 Method and apparatus for implementing automatic retransmission request in relay system
CN101291430B (en) * 2007-04-19 2012-02-29 株式会社Ntt都科摩 Video transmission method and device in a wireless network
US8201041B2 (en) 2007-07-03 2012-06-12 Industrial Technology Research Institute Transmission control methods and devices for communication systems
CN101340267B (en) * 2007-07-03 2015-05-13 财团法人工业技术研究院 Communication system transmission control method and device
CN101420335B (en) 2007-10-26 2011-09-14 华为技术有限公司 Failure detection/processing method and apparatus for peer-to-peer network node
KR100934856B1 (en) 2007-12-28 2009-12-31 엘에스산전 주식회사 How to Transfer Data Between Nodes in Wireless Network Environment
CN101505211A (en) * 2008-02-04 2009-08-12 华为技术有限公司 Method, system and multicast network for enhancing reliability of multicast
CN101562507B (en) * 2008-04-14 2013-05-01 中兴通讯股份有限公司 Data transmission method
CN102090029A (en) * 2008-05-12 2011-06-08 爱立信电话股份有限公司 Rerouting traffic in communication networks
JP5307898B2 (en) * 2008-10-16 2013-10-02 テレフオンアクチーボラゲット エル エム エリクソン（パブル） Network node
RU2496263C2 (en) * 2009-03-17 2013-10-20 Хуавэй Текнолоджиз Ко., Лтд. Method, apparatus and system for sending data packet
KR101037684B1 (en) * 2009-04-01 2011-05-30 울산대학교 산학협력단 Method for receiving data in wireless communication system and wireless communication system using same
US9282027B1 (en) 2010-03-31 2016-03-08 Amazon Technologies, Inc. Managing use of alternative intermediate destination computing nodes for provided computer networks
RU2461136C2 (en) * 2010-04-30 2012-09-10 Виктор Николаевич Куделя Method for guaranteed delivery of data units in switched lossy network
CN102300234B (en) * 2010-06-25 2014-05-07 上海无线通信研究中心 Novel multi-hop routing transmission method
JP5834365B2 (en) * 2011-08-02 2015-12-16 ▲ホア▼▲ウェイ▼技術有限公司 Method and apparatus for operation of Diameter routing
CN102340391B (en) * 2011-11-14 2014-12-03 电子科技大学 Segmented ARQ (automatic repeat request) automatic retransmission method
CN102447632A (en) * 2011-12-30 2012-05-09 四川川大智胜软件股份有限公司 Network transmission method having data error tolerance capability
US9172507B2 (en) 2012-04-03 2015-10-27 Nevion Europe As Signal protection
US9113347B2 (en) 2012-12-05 2015-08-18 At&T Intellectual Property I, Lp Backhaul link for distributed antenna system
US20150280931A1 (en) * 2013-01-07 2015-10-01 Mitsubishi Electric Corporation Data distribution system, root wireless device, and wireless device
CN103117955B (en) * 2013-01-16 2016-08-03 华为技术有限公司 Method for message transmission and device, system
KR101509627B1 (en) 2013-02-20 2015-04-07 홍익대학교 산학협력단 System for recovering route in wireless ad-hoc networks and route recovering method thereof
US9999038B2 (en) 2013-05-31 2018-06-12 At&T Intellectual Property I, L.P. Remote distributed antenna system
US9525524B2 (en) 2013-05-31 2016-12-20 At&T Intellectual Property I, L.P. Remote distributed antenna system
US9722916B2 (en) * 2013-09-30 2017-08-01 Cisco Technology, Inc. Data-plane driven fast protection mechanism for MPLS pseudowire services
US8897697B1 (en) 2013-11-06 2014-11-25 At&T Intellectual Property I, Lp Millimeter-wave surface-wave communications
CN104038364B (en) 2013-12-31 2015-09-30 华为技术有限公司 The fault-tolerance approach of distributed stream treatment system, node and system
US9768833B2 (en) 2014-09-15 2017-09-19 At&T Intellectual Property I, L.P. Method and apparatus for sensing a condition in a transmission medium of electromagnetic waves
US10063280B2 (en) 2014-09-17 2018-08-28 At&T Intellectual Property I, L.P. Monitoring and mitigating conditions in a communication network
US9615269B2 (en) 2014-10-02 2017-04-04 At&T Intellectual Property I, L.P. Method and apparatus that provides fault tolerance in a communication network
US9685992B2 (en) 2014-10-03 2017-06-20 At&T Intellectual Property I, L.P. Circuit panel network and methods thereof
US9762289B2 (en) 2014-10-14 2017-09-12 At&T Intellectual Property I, L.P. Method and apparatus for transmitting or receiving signals in a transportation system
US9973299B2 (en) 2014-10-14 2018-05-15 At&T Intellectual Property I, L.P. Method and apparatus for adjusting a mode of communication in a communication network
US9769020B2 (en) 2014-10-21 2017-09-19 At&T Intellectual Property I, L.P. Method and apparatus for responding to events affecting communications in a communication network
US9577306B2 (en) 2014-10-21 2017-02-21 At&T Intellectual Property I, L.P. Guided-wave transmission device and methods for use therewith
US9780834B2 (en) 2014-10-21 2017-10-03 At&T Intellectual Property I, L.P. Method and apparatus for transmitting electromagnetic waves
US9520945B2 (en) 2014-10-21 2016-12-13 At&T Intellectual Property I, L.P. Apparatus for providing communication services and methods thereof
US9627768B2 (en) 2014-10-21 2017-04-18 At&T Intellectual Property I, L.P. Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith
US9312919B1 (en) 2014-10-21 2016-04-12 At&T Intellectual Property I, Lp Transmission device with impairment compensation and methods for use therewith
US9653770B2 (en) 2014-10-21 2017-05-16 At&T Intellectual Property I, L.P. Guided wave coupler, coupling module and methods for use therewith
US9544006B2 (en) 2014-11-20 2017-01-10 At&T Intellectual Property I, L.P. Transmission device with mode division multiplexing and methods for use therewith
US10340573B2 (en) 2016-10-26 2019-07-02 At&T Intellectual Property I, L.P. Launcher with cylindrical coupling device and methods for use therewith
US9800327B2 (en) 2014-11-20 2017-10-24 At&T Intellectual Property I, L.P. Apparatus for controlling operations of a communication device and methods thereof
US9461706B1 (en) 2015-07-31 2016-10-04 At&T Intellectual Property I, Lp Method and apparatus for exchanging communication signals
US9997819B2 (en) 2015-06-09 2018-06-12 At&T Intellectual Property I, L.P. Transmission medium and method for facilitating propagation of electromagnetic waves via a core
US9742462B2 (en) 2014-12-04 2017-08-22 At&T Intellectual Property I, L.P. Transmission medium and communication interfaces and methods for use therewith
US9954287B2 (en) 2014-11-20 2018-04-24 At&T Intellectual Property I, L.P. Apparatus for converting wireless signals and electromagnetic waves and methods thereof
US10009067B2 (en) 2014-12-04 2018-06-26 At&T Intellectual Property I, L.P. Method and apparatus for configuring a communication interface
US10243784B2 (en) 2014-11-20 2019-03-26 At&T Intellectual Property I, L.P. System for generating topology information and methods thereof
US10144036B2 (en) 2015-01-30 2018-12-04 At&T Intellectual Property I, L.P. Method and apparatus for mitigating interference affecting a propagation of electromagnetic waves guided by a transmission medium
US9876570B2 (en) 2015-02-20 2018-01-23 At&T Intellectual Property I, Lp Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith
US9749013B2 (en) 2015-03-17 2017-08-29 At&T Intellectual Property I, L.P. Method and apparatus for reducing attenuation of electromagnetic waves guided by a transmission medium
US10224981B2 (en) 2015-04-24 2019-03-05 At&T Intellectual Property I, Lp Passive electrical coupling device and methods for use therewith
US9705561B2 (en) 2015-04-24 2017-07-11 At&T Intellectual Property I, L.P. Directional coupling device and methods for use therewith
US9793954B2 (en) 2015-04-28 2017-10-17 At&T Intellectual Property I, L.P. Magnetic coupling device and methods for use therewith
US9948354B2 (en) 2015-04-28 2018-04-17 At&T Intellectual Property I, L.P. Magnetic coupling device with reflective plate and methods for use therewith
US9871282B2 (en) 2015-05-14 2018-01-16 At&T Intellectual Property I, L.P. At least one transmission medium having a dielectric surface that is covered at least in part by a second dielectric
US9748626B2 (en) 2015-05-14 2017-08-29 At&T Intellectual Property I, L.P. Plurality of cables having different cross-sectional shapes which are bundled together to form a transmission medium
US9490869B1 (en) 2015-05-14 2016-11-08 At&T Intellectual Property I, L.P. Transmission medium having multiple cores and methods for use therewith
US10650940B2 (en) 2015-05-15 2020-05-12 At&T Intellectual Property I, L.P. Transmission medium having a conductive material and methods for use therewith
US9917341B2 (en) 2015-05-27 2018-03-13 At&T Intellectual Property I, L.P. Apparatus and method for launching electromagnetic waves and for modifying radial dimensions of the propagating electromagnetic waves
US9912381B2 (en) 2015-06-03 2018-03-06 At&T Intellectual Property I, Lp Network termination and methods for use therewith
US10103801B2 (en) 2015-06-03 2018-10-16 At&T Intellectual Property I, L.P. Host node device and methods for use therewith
US9866309B2 (en) 2015-06-03 2018-01-09 At&T Intellectual Property I, Lp Host node device and methods for use therewith
US10812174B2 (en) 2015-06-03 2020-10-20 At&T Intellectual Property I, L.P. Client node device and methods for use therewith
US9608692B2 (en) 2015-06-11 2017-03-28 At&T Intellectual Property I, L.P. Repeater and methods for use therewith
US9820146B2 (en) 2015-06-12 2017-11-14 At&T Intellectual Property I, L.P. Method and apparatus for authentication and identity management of communicating devices
US9667317B2 (en) 2015-06-15 2017-05-30 At&T Intellectual Property I, L.P. Method and apparatus for providing security using network traffic adjustments
US9865911B2 (en) 2015-06-25 2018-01-09 At&T Intellectual Property I, L.P. Waveguide system for slot radiating first electromagnetic waves that are combined into a non-fundamental wave mode second electromagnetic wave on a transmission medium
US9509415B1 (en) 2015-06-25 2016-11-29 At&T Intellectual Property I, L.P. Methods and apparatus for inducing a fundamental wave mode on a transmission medium
US9640850B2 (en) 2015-06-25 2017-05-02 At&T Intellectual Property I, L.P. Methods and apparatus for inducing a non-fundamental wave mode on a transmission medium
US10205655B2 (en) 2015-07-14 2019-02-12 At&T Intellectual Property I, L.P. Apparatus and methods for communicating utilizing an antenna array and multiple communication paths
US9853342B2 (en) 2015-07-14 2017-12-26 At&T Intellectual Property I, L.P. Dielectric transmission medium connector and methods for use therewith
US10170840B2 (en) 2015-07-14 2019-01-01 At&T Intellectual Property I, L.P. Apparatus and methods for sending or receiving electromagnetic signals
US10341142B2 (en) 2015-07-14 2019-07-02 At&T Intellectual Property I, L.P. Apparatus and methods for generating non-interfering electromagnetic waves on an uninsulated conductor
US10148016B2 (en) 2015-07-14 2018-12-04 At&T Intellectual Property I, L.P. Apparatus and methods for communicating utilizing an antenna array
US10044409B2 (en) 2015-07-14 2018-08-07 At&T Intellectual Property I, L.P. Transmission medium and methods for use therewith
US9722318B2 (en) 2015-07-14 2017-08-01 At&T Intellectual Property I, L.P. Method and apparatus for coupling an antenna to a device
US9628116B2 (en) 2015-07-14 2017-04-18 At&T Intellectual Property I, L.P. Apparatus and methods for transmitting wireless signals
US10033108B2 (en) 2015-07-14 2018-07-24 At&T Intellectual Property I, L.P. Apparatus and methods for generating an electromagnetic wave having a wave mode that mitigates interference
US9847566B2 (en) 2015-07-14 2017-12-19 At&T Intellectual Property I, L.P. Method and apparatus for adjusting a field of a signal to mitigate interference
US10320586B2 (en) 2015-07-14 2019-06-11 At&T Intellectual Property I, L.P. Apparatus and methods for generating non-interfering electromagnetic waves on an insulated transmission medium
US9882257B2 (en) 2015-07-14 2018-01-30 At&T Intellectual Property I, L.P. Method and apparatus for launching a wave mode that mitigates interference
US9793951B2 (en) 2015-07-15 2017-10-17 At&T Intellectual Property I, L.P. Method and apparatus for launching a wave mode that mitigates interference
US10090606B2 (en) 2015-07-15 2018-10-02 At&T Intellectual Property I, L.P. Antenna system with dielectric array and methods for use therewith
US9608740B2 (en) 2015-07-15 2017-03-28 At&T Intellectual Property I, L.P. Method and apparatus for launching a wave mode that mitigates interference
US9912027B2 (en) 2015-07-23 2018-03-06 At&T Intellectual Property I, L.P. Method and apparatus for exchanging communication signals
US9948333B2 (en) 2015-07-23 2018-04-17 At&T Intellectual Property I, L.P. Method and apparatus for wireless communications to mitigate interference
US9871283B2 (en) 2015-07-23 2018-01-16 At&T Intellectual Property I, Lp Transmission medium having a dielectric core comprised of plural members connected by a ball and socket configuration
US9749053B2 (en) 2015-07-23 2017-08-29 At&T Intellectual Property I, L.P. Node device, repeater and methods for use therewith
US9735833B2 (en) 2015-07-31 2017-08-15 At&T Intellectual Property I, L.P. Method and apparatus for communications management in a neighborhood network
US9967173B2 (en) 2015-07-31 2018-05-08 At&T Intellectual Property I, L.P. Method and apparatus for authentication and identity management of communicating devices
US9904535B2 (en) 2015-09-14 2018-02-27 At&T Intellectual Property I, L.P. Method and apparatus for distributing software
US10009063B2 (en) 2015-09-16 2018-06-26 At&T Intellectual Property I, L.P. Method and apparatus for use with a radio distributed antenna system having an out-of-band reference signal
US10136434B2 (en) 2015-09-16 2018-11-20 At&T Intellectual Property I, L.P. Method and apparatus for use with a radio distributed antenna system having an ultra-wideband control channel
US10079661B2 (en) 2015-09-16 2018-09-18 At&T Intellectual Property I, L.P. Method and apparatus for use with a radio distributed antenna system having a clock reference
US9769128B2 (en) 2015-09-28 2017-09-19 At&T Intellectual Property I, L.P. Method and apparatus for encryption of communications over a network
US9729197B2 (en) 2015-10-01 2017-08-08 At&T Intellectual Property I, L.P. Method and apparatus for communicating network management traffic over a network
US9876264B2 (en) 2015-10-02 2018-01-23 At&T Intellectual Property I, Lp Communication system, guided wave switch and methods for use therewith
US10355367B2 (en) 2015-10-16 2019-07-16 At&T Intellectual Property I, L.P. Antenna structure for exchanging wireless signals
RU2610697C1 (en) * 2015-12-24 2017-02-14 Федеральное государственное унитарное предприятие "18 Центральный научно-исследовательский институт" Министерства обороны Российской Федерации Method and device for retransmitting data via user datagram protocol
US9912419B1 (en) 2016-08-24 2018-03-06 At&T Intellectual Property I, L.P. Method and apparatus for managing a fault in a distributed antenna system
US9860075B1 (en) 2016-08-26 2018-01-02 At&T Intellectual Property I, L.P. Method and communication node for broadband distribution
US10291311B2 (en) 2016-09-09 2019-05-14 At&T Intellectual Property I, L.P. Method and apparatus for mitigating a fault in a distributed antenna system
US11032819B2 (en) 2016-09-15 2021-06-08 At&T Intellectual Property I, L.P. Method and apparatus for use with a radio distributed antenna system having a control channel reference signal
US10340600B2 (en) 2016-10-18 2019-07-02 At&T Intellectual Property I, L.P. Apparatus and methods for launching guided waves via plural waveguide systems
US10135146B2 (en) 2016-10-18 2018-11-20 At&T Intellectual Property I, L.P. Apparatus and methods for launching guided waves via circuits
US10135147B2 (en) 2016-10-18 2018-11-20 At&T Intellectual Property I, L.P. Apparatus and methods for launching guided waves via an antenna
US10811767B2 (en) 2016-10-21 2020-10-20 At&T Intellectual Property I, L.P. System and dielectric antenna with convex dielectric radome
US9876605B1 (en) 2016-10-21 2018-01-23 At&T Intellectual Property I, L.P. Launcher and coupling system to support desired guided wave mode
US10374316B2 (en) 2016-10-21 2019-08-06 At&T Intellectual Property I, L.P. System and dielectric antenna with non-uniform dielectric
US9991580B2 (en) 2016-10-21 2018-06-05 At&T Intellectual Property I, L.P. Launcher and coupling system for guided wave mode cancellation
US10312567B2 (en) 2016-10-26 2019-06-04 At&T Intellectual Property I, L.P. Launcher with planar strip antenna and methods for use therewith
US10291334B2 (en) 2016-11-03 2019-05-14 At&T Intellectual Property I, L.P. System for detecting a fault in a communication system
US10498044B2 (en) 2016-11-03 2019-12-03 At&T Intellectual Property I, L.P. Apparatus for configuring a surface of an antenna
US10224634B2 (en) 2016-11-03 2019-03-05 At&T Intellectual Property I, L.P. Methods and apparatus for adjusting an operational characteristic of an antenna
US10225025B2 (en) 2016-11-03 2019-03-05 At&T Intellectual Property I, L.P. Method and apparatus for detecting a fault in a communication system
US10178445B2 (en) 2016-11-23 2019-01-08 At&T Intellectual Property I, L.P. Methods, devices, and systems for load balancing between a plurality of waveguides
US10340601B2 (en) 2016-11-23 2019-07-02 At&T Intellectual Property I, L.P. Multi-antenna system and methods for use therewith
US10090594B2 (en) 2016-11-23 2018-10-02 At&T Intellectual Property I, L.P. Antenna system having structural configurations for assembly
US10535928B2 (en) 2016-11-23 2020-01-14 At&T Intellectual Property I, L.P. Antenna system and methods for use therewith
US10340603B2 (en) 2016-11-23 2019-07-02 At&T Intellectual Property I, L.P. Antenna system having shielded structural configurations for assembly
US10305190B2 (en) 2016-12-01 2019-05-28 At&T Intellectual Property I, L.P. Reflecting dielectric antenna system and methods for use therewith
US10361489B2 (en) 2016-12-01 2019-07-23 At&T Intellectual Property I, L.P. Dielectric dish antenna system and methods for use therewith
US10382976B2 (en) 2016-12-06 2019-08-13 At&T Intellectual Property I, L.P. Method and apparatus for managing wireless communications based on communication paths and network device positions
US10135145B2 (en) 2016-12-06 2018-11-20 At&T Intellectual Property I, L.P. Apparatus and methods for generating an electromagnetic wave along a transmission medium
US10020844B2 (en) 2016-12-06 2018-07-10 T&T Intellectual Property I, L.P. Method and apparatus for broadcast communication via guided waves
US10637149B2 (en) 2016-12-06 2020-04-28 At&T Intellectual Property I, L.P. Injection molded dielectric antenna and methods for use therewith
US10439675B2 (en) 2016-12-06 2019-10-08 At&T Intellectual Property I, L.P. Method and apparatus for repeating guided wave communication signals
US10819035B2 (en) 2016-12-06 2020-10-27 At&T Intellectual Property I, L.P. Launcher with helical antenna and methods for use therewith
US10694379B2 (en) 2016-12-06 2020-06-23 At&T Intellectual Property I, L.P. Waveguide system with device-based authentication and methods for use therewith
US9927517B1 (en) 2016-12-06 2018-03-27 At&T Intellectual Property I, L.P. Apparatus and methods for sensing rainfall
US10727599B2 (en) 2016-12-06 2020-07-28 At&T Intellectual Property I, L.P. Launcher with slot antenna and methods for use therewith
US10326494B2 (en) 2016-12-06 2019-06-18 At&T Intellectual Property I, L.P. Apparatus for measurement de-embedding and methods for use therewith
US10755542B2 (en) 2016-12-06 2020-08-25 At&T Intellectual Property I, L.P. Method and apparatus for surveillance via guided wave communication
US10139820B2 (en) 2016-12-07 2018-11-27 At&T Intellectual Property I, L.P. Method and apparatus for deploying equipment of a communication system
US10389029B2 (en) 2016-12-07 2019-08-20 At&T Intellectual Property I, L.P. Multi-feed dielectric antenna system with core selection and methods for use therewith
US10547348B2 (en) 2016-12-07 2020-01-28 At&T Intellectual Property I, L.P. Method and apparatus for switching transmission mediums in a communication system
US10027397B2 (en) 2016-12-07 2018-07-17 At&T Intellectual Property I, L.P. Distributed antenna system and methods for use therewith
US10243270B2 (en) 2016-12-07 2019-03-26 At&T Intellectual Property I, L.P. Beam adaptive multi-feed dielectric antenna system and methods for use therewith
US10168695B2 (en) 2016-12-07 2019-01-01 At&T Intellectual Property I, L.P. Method and apparatus for controlling an unmanned aircraft
US10359749B2 (en) 2016-12-07 2019-07-23 At&T Intellectual Property I, L.P. Method and apparatus for utilities management via guided wave communication
US10446936B2 (en) 2016-12-07 2019-10-15 At&T Intellectual Property I, L.P. Multi-feed dielectric antenna system and methods for use therewith
US9893795B1 (en) 2016-12-07 2018-02-13 At&T Intellectual Property I, Lp Method and repeater for broadband distribution
US9911020B1 (en) 2016-12-08 2018-03-06 At&T Intellectual Property I, L.P. Method and apparatus for tracking via a radio frequency identification device
US10601494B2 (en) 2016-12-08 2020-03-24 At&T Intellectual Property I, L.P. Dual-band communication device and method for use therewith
US10916969B2 (en) 2016-12-08 2021-02-09 At&T Intellectual Property I, L.P. Method and apparatus for providing power using an inductive coupling
US10326689B2 (en) 2016-12-08 2019-06-18 At&T Intellectual Property I, L.P. Method and system for providing alternative communication paths
US10777873B2 (en) 2016-12-08 2020-09-15 At&T Intellectual Property I, L.P. Method and apparatus for mounting network devices
US10103422B2 (en) 2016-12-08 2018-10-16 At&T Intellectual Property I, L.P. Method and apparatus for mounting network devices
US10530505B2 (en) 2016-12-08 2020-01-07 At&T Intellectual Property I, L.P. Apparatus and methods for launching electromagnetic waves along a transmission medium
US10069535B2 (en) 2016-12-08 2018-09-04 At&T Intellectual Property I, L.P. Apparatus and methods for launching electromagnetic waves having a certain electric field structure
US10938108B2 (en) 2016-12-08 2021-03-02 At&T Intellectual Property I, L.P. Frequency selective multi-feed dielectric antenna system and methods for use therewith
US10411356B2 (en) 2016-12-08 2019-09-10 At&T Intellectual Property I, L.P. Apparatus and methods for selectively targeting communication devices with an antenna array
US9998870B1 (en) 2016-12-08 2018-06-12 At&T Intellectual Property I, L.P. Method and apparatus for proximity sensing
US10389037B2 (en) 2016-12-08 2019-08-20 At&T Intellectual Property I, L.P. Apparatus and methods for selecting sections of an antenna array and use therewith
US10264586B2 (en) 2016-12-09 2019-04-16 At&T Mobility Ii Llc Cloud-based packet controller and methods for use therewith
US9838896B1 (en) 2016-12-09 2017-12-05 At&T Intellectual Property I, L.P. Method and apparatus for assessing network coverage
US10340983B2 (en) 2016-12-09 2019-07-02 At&T Intellectual Property I, L.P. Method and apparatus for surveying remote sites via guided wave communications
US9973940B1 (en) 2017-02-27 2018-05-15 At&T Intellectual Property I, L.P. Apparatus and methods for dynamic impedance matching of a guided wave launcher
US10298293B2 (en) 2017-03-13 2019-05-21 At&T Intellectual Property I, L.P. Apparatus of communication utilizing wireless network devices
CN114449538B (en) * 2020-11-05 2024-04-23 上海朗帛通信技术有限公司 Method and apparatus for use in relay wireless communication

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5058105A (en) * 1990-04-04 1991-10-15 At&T Bell Laboratories Network alternate routing arrangement
US5652751A (en) * 1996-03-26 1997-07-29 Hazeltine Corporation Architecture for mobile radio networks with dynamically changing topology using virtual subnets
WO2000013455A1 (en) * 1998-08-27 2000-03-09 Intel Corporation Method and apparatus for input/output link retry, failure and recovery in a computer network
US6046978A (en) * 1996-10-16 2000-04-04 Philips Electronics North America Corporation Method for configuring and routing data within a wireless multihop network and a wireless network for implementing the same

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5105424A (en) * 1988-06-02 1992-04-14 California Institute Of Technology Inter-computer message routing system with each computer having separate routinng automata for each dimension of the network
US5455865A (en) * 1989-05-09 1995-10-03 Digital Equipment Corporation Robust packet routing over a distributed network containing malicious failures
JPH0752437B2 (en) * 1991-08-07 1995-06-05 インターナショナル・ビジネス・マシーンズ・コーポレイション Multi-node network to track message progress
GB9521831D0 (en) * 1995-10-25 1996-01-03 Newbridge Networks Corp Crankback and loop detection in ATM SVC routing
RU2115162C1 (en) * 1996-07-05 1998-07-10 Научно-конструкторское бюро вычислительных систем Таганрогского государственного радиотехнического университета Message routing network
US6366584B1 (en) * 1999-02-06 2002-04-02 Triton Network Systems, Inc. Commercial network based on point to point radios

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5058105A (en) * 1990-04-04 1991-10-15 At&T Bell Laboratories Network alternate routing arrangement
US5652751A (en) * 1996-03-26 1997-07-29 Hazeltine Corporation Architecture for mobile radio networks with dynamically changing topology using virtual subnets
US6046978A (en) * 1996-10-16 2000-04-04 Philips Electronics North America Corporation Method for configuring and routing data within a wireless multihop network and a wireless network for implementing the same
WO2000013455A1 (en) * 1998-08-27 2000-03-09 Intel Corporation Method and apparatus for input/output link retry, failure and recovery in a computer network

Also Published As

Publication number Publication date
WO2003005629A1 (en) 2003-01-16
JP4392033B2 (en) 2009-12-24
RU2003134626A (en) 2005-04-27
AU2002311547B2 (en) 2006-04-27
CN1541466A (en) 2004-10-27
MXPA03010849A (en) 2004-11-22
EP1415424A1 (en) 2004-05-06
EP1415424A4 (en) 2006-06-07
RU2298289C2 (en) 2007-04-27
JP2007251991A (en) 2007-09-27
JP2004537206A (en) 2004-12-09
CA2449532A1 (en) 2003-01-16

Similar Documents

Publication Publication Date Title
CN100411327C (en) Apparatus and method for transferring packets in a multi-hop wireless network
AU2002311547A1 (en) Apparatus and method for delivery of packets in multi-hop wireless networks
JP5043941B2 (en) Method and system for detecting data obsolescence based on service quality
US6314464B1 (en) Communication control method
US8300653B2 (en) Systems and methods for assured communications with quality of service
US20080049620A1 (en) Systems and methods for energy-conscious communication in wireless ad-hoc networks
US20080137669A1 (en) Network of nodes
JP2008099286A (en) Method and apparatus for supporting data flow control in wireless mesh network
JPH10200598A (en) Communication device
JPH10126446A (en) Data terminal in TCP network
CN103067291A (en) Method and device of up-down link correlation
JPH10243016A (en) Network controller
CN100364295C (en) Method and apparatus for exchanging routing information in a distributed router system
CN1996933A (en) Method for congestion control in the real time multicast service
JP2003101518A (en) Live mobile camera system
CN107968754B (en) Flow table issuing method, receiving method, controller, switch and forwarding system
JP2002314584A (en) Packet relay system
WO2000011841A1 (en) Method and system for prioritised congestion control in a switching hub
CN101399756B (en) Method, system and device for transmitting service data in peer-to-peer P2P network
JPH11177621A (en) Data transmission equipment and data communication system
Cisco Configuring STUN and BSTUN
Cisco Configuring STUN
Cisco Configuring STUN
Cisco Configuring STUN and BSTUN
JP2006197473A (en) node

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20080813

Termination date: 20110626