公开(公告)号：WO2015085231A1

公开(公告)日：2015-06-11

申请号：PCT/US2014/068889

申请日：2014-12-05

Applicant: INTEL CORPORATION ,  BIRRITTELLA, Mark S.

Inventor： BIRRITTELLA, Mark S.

IPC: H04L12/70 ,  H04L1/00

CPC classification number: H04L47/36 ,  H04L49/30 ,  H04L69/22

Abstract: Method, apparatus, and systems for Link Transfer, bit error detection and link retry using flit bundles asynchronous to link Fabric Packets. A first type of packet comprising a Fabric Packet is generated and its data content is divided into multiple data units called "flits." The flits are then bundled into a second type of packet comprising Link Transfer Packets (LTPs). The LTPs are then sent over single link segments in a fabric comprising many point-to-point links. Each LTP includes a CRC that is used to ensure that data transmitted over each link segment is error free, and comprises a unit of retransmission. The size of the fabric packets may vary, and they may be larger or smaller than an LTP. The transfer scheme enabled flits from multiple fabric packets to be bundled into a single LTP. Upon receipt at a fabric endpoint, the flits from the LTPs are extracted and reassembled to regenerate the Fabric Packets.

Abstract translation: 链路传输的方法，设备和系统，使用与链路Fabric数据包异步的flit bundle的位错误检测和链接重试。 生成包括Fabric Packet的第一类型的分组，并将其数据内容划分成称为“flits”的多个数据单元。 然后，将这些闪存捆绑成包括链路传输分组（LTP）的第二类型的分组。 然后，LTP通过包括许多点对点链路的结构中的单个链路段发送。 每个LTP包括CRC，用于确保通过每个链路段发送的数据是无错误的，并且包括重传单元。 织物分组的大小可以变化，并且它们可以大于或小于LTP。 传输方案使来自多个Fabric数据包的传输方案捆绑成一个LTP。 在结构端点接收时，提取并重新组合来自LTP的闪烁以重新生成Fabric数据包。

公开(公告)号：WO2015085255A1

公开(公告)日：2015-06-11

申请号：PCT/US2014/068931

申请日：2014-12-05

Applicant: INTEL CORPORATION ,  BIRRITTELLA, Mark S.

Inventor： BIRRITTELLA, Mark S.

IPC: H04L1/00 ,  H04L1/20 ,  H04L29/10

CPC classification number: H04L1/0045 ,  H03M13/09 ,  H04L1/0058 ,  H04L1/0061 ,  H04L1/0071 ,  H04L1/08 ,  H04L1/1607 ,  H04L1/1657 ,  H04L1/1874

Abstract: Method, apparatus, and systems for detecting lane errors and removing errant lanes in multi-lane links. Data comprising link packets is split into a plurality of bitstreams and transmitted over respective lanes of a multi-lane link in parallel. The bitstream data is received at multiple receive lanes of a receiver port and processed to reassemble link packets and to calculate a CRC over the data received on each lane. The link packets include a transmitted CRC that is compared to a received CRC to detect link packet errors. Upon detection of a link packet error, per-lane or per transfer group CRC values are stored, and a retry request is issued to retransmit the bad packet. In conjunction with receipt of the retransmitted packet, per-lane or per transfer group CRC values are recalculated over the received data and compared with the stored per-lane or per transfer group CRC values to detect the lane causing the link packet error.

Abstract translation: 用于检测车道错误和消除多车道链路中的错误车道的方法，装置和系统。 包括链路分组的数据被分割成多个比特流并且并行地在多通道链路的各个通道上传输。 比特流数据在接收器端口的多个接收通道处被接收并被处理以重新组合链路分组并且计算在每个通道上接收的数据上的CRC。 链路分组包括与接收到的CRC进行比较的发送CRC，以检测链路分组错误。 在检测到链路分组错误时，存储每通道或每个传输组CRC值，并且发出重试请求以重新发送坏数据包。 结合接收重传的分组，每通道或每个传输组CRC值在接收的数据上重新计算，并与存储的每通道或每个传输组CRC值进行比较，以检测引起链路分组错误的通道。

公开(公告)号：WO2015094918A1

公开(公告)日：2015-06-25

申请号：PCT/US2014/069801

申请日：2014-12-11

Applicant: INTEL CORPORATION ,  LOVETT, Thomas D. ,  CHENG, Albert S. ,  BIRRITTELLA, Mark S. ,  KUNZ, James A. ,  RIMMER, Todd M.

Inventor： LOVETT, Thomas D. ,  CHENG, Albert S. ,  BIRRITTELLA, Mark S. ,  KUNZ, James A. ,  RIMMER, Todd M.

IPC: H04L12/885

CPC classification number: H04L47/821 ,  H04L1/0041 ,  H04L1/0061 ,  H04L1/0071 ,  H04L1/12 ,  H04L25/14 ,  H04L47/2441 ,  H04L47/365 ,  H04L47/621 ,  H04L47/6275

Abstract: Methods, apparatus, and systems for implementing hierarchical and lossless packet preemption and interleaving to reduce latency jitter in flow-controller packet-based networks. Fabric packets are divided into a plurality of data units, with data units for different fabric packets buffered in separate buffers. Data units are pulled from the buffers and added to a transmit stream in which groups of data units are interleaved. Upon receipt by a receiver, the groups of data units are separated out and buffered in separate buffers under which data units for the same fabric packets are grouped together. In one aspect, each buffer is associated with a respective virtual lane (VL), and the fabric packets are effectively transferred over fabric links using virtual lanes. VLs may have different levels of priority under which data units for fabric packets in higher-priority VLs may preempt fabric packets in lower-priority VLs. By transferring data units rather than entire packets, transmission of a packet can be temporarily paused in favor of a higher-priority packet. Multiple levels of preemption and interleaving in a nested manner are supported.

Abstract translation: 用于实现分级和无损数据包抢占和交织以减少流控制器基于分组的网络中的延迟抖动的方法，装置和系统。 结构数据包被划分为多个数据单元，不同结构数据包的数据单元缓冲在单独的缓冲区中。 数据单元被从缓冲器中拉出并且被添加到数据单元组交错的发送流中。 在由接收器接收时，数据单元组被分离出并且在单独的缓冲器中缓冲，在这些缓冲器中，用于相同结构数据包的数据单元被分组在一起。 在一个方面，每个缓冲器与相应的虚拟通道（VL）相关联，并且使用虚拟通道在结构链路上有效地传送结构数据包。 VL可以具有不同的优先级，在该优先级下，较高优先级VL中的结构数据包的数据单元可以优先考虑低优先级VL中的结构数据包。 通过传送数据单元而不是整个分组，可以临时暂停分组的传输，以利于较高优先级的分组。 支持多种级别的抢占和嵌套方式的交错。

公开(公告)号：WO2015119732A1

公开(公告)日：2015-08-13

申请号：PCT/US2015/010304

申请日：2015-01-06

Applicant: INTEL CORPORATION ,  BIRRITTELLA, Mark S. ,  LOVETT, Thomas D. ,  RIMMER, Todd M.

Inventor： BIRRITTELLA, Mark S. ,  LOVETT, Thomas D. ,  RIMMER, Todd M.

IPC: H04L12/951 ,  H04L12/937

CPC classification number: H04L45/745 ,  H04L5/0055 ,  H04L45/66 ,  H04L45/74 ,  H04L47/17 ,  H04L47/39 ,  H04L49/25 ,  H04L61/3075 ,  H04Q2213/13215

Abstract: Method, apparatus, and systems for reliably transferring Ethernet packet data over a link layer and facilitating fabric-to-Ethernet and Ethernet-to-fabric gateway operations at matching wire speed and packet data rate. Ethernet header and payload data is extracted from Ethernet frames received at the gateway and encapsulated in fabric packets to be forwarded to a fabric endpoint hosting an entity to which the Ethernet packet is addressed. The fabric packets are divided into flits, which are bundled in groups to form link packets that are transferred over the fabric at the Link layer using a reliable transmission scheme employing implicit ACKnowledgements. At the endpoint, the fabric packet is regenerated, and the Ethernet packet data is de-encapsulated. The Ethernet frames received from and transmitted to an Ethernet network are encoded using 64b/66b encoding, having an overhead-to-data bit ratio of 1:32. Meanwhile, the link packets have the same ratio, including one overhead bit per flit and a 14-bit CRC plus a 2-bit credit return field or sideband used for credit-based flow control.

Abstract translation: 用于通过链路层可靠地传输以太网分组数据的方法，装置和系统，并且以匹配的线速度和分组数据速率促进以太网和以太网到网络的网关操作。 从网关接收的以太网帧提取以太网报头和有效载荷数据，并将其封装在结构数据包中，以转发到托管以太网数据包所针对的实体的结构端点。 结构分组被划分成flits，它们被分组成组，以形成通过使用隐式确认的可靠传输方案在链路层上通过结构传送的链路分组。 在端点，重新生成Fabric数据包，并对以太网数据包进行解封装。 从以太网网络接收并发送到以太网的以太网帧使用64b / 66b编码进行编码，具有1:32的开销数据比特率。 同时，链路分组具有相同的比率，包括一个开销比特每个flit和一个14比特CRC加上一个2比特的信用回报字段或用于基于信用的流量控制的边带。

公开(公告)号：WO2015085254A1

公开(公告)日：2015-06-11

申请号：PCT/US2014/068930

申请日：2014-12-05

Applicant: INTEL CORPORATION ,  BIRRITTELLA, Mark, S.

Inventor： BIRRITTELLA, Mark, S.

IPC: H04L1/18 ,  H04L29/10

CPC classification number: H04L1/1657 ,  G06F9/00 ,  H04L1/08 ,  H04L1/1867 ,  H04L1/1874 ,  H04L67/104

Abstract: Methods, apparatus, and systems for implementing a link layer retry protocol utilizing implicit ACKnowledgements (ACKs). Peer link interfaces are configured to facilitate confirmed error-free delivery of link-layer packets through use of implicit ACKs, while also providing retransmission of packets for which errors are detected and guaranteeing the link control data is either successfully received or data transfer over the link is prevented. In conjunction with transmitting packets, reliable packets are copied into sequential slots in a replay buffer. Each link interface tracks the slot at which each reliable packet is buffered, and in response to detection of an error, a retry request is sent to the transmit-side to retransmit the errant packet. The previously buffered copy of the errant packet is retrieved from the replay buffer and retransmitted. Through use of a link roundtrip detection mechanism, absence of a retry request by the time a replay buffer has returned to the slot of a reliable packet (plus a predetermined number of additional transfer cycles, if applicable) provides an implicit ACK that the packet was received without error.

Abstract translation: 用于实现使用隐式确认（ACK）的链路层重试协议的方法，装置和系统。 对等链路接口被配置为通过使用隐式ACK来促进确认的无差错地传送链路层分组，同时还提供重传检测到错误的分组，并且确保链路控制数据被成功接收或通过链路的数据传送 被阻止 结合发送分组，可靠的分组被复制到重播缓冲器中的顺序时隙中。 每个链路接口跟踪缓冲每个可靠分组的时隙，并且响应于检测到错误，重发请求被发送到发送侧以重传错误分组。 从重放缓冲区中检索先前缓存的错误数据包的副本并重发。 通过使用链路往返检测机制，在重播缓冲器已经返回到可靠分组的时隙（加上预定数量的附加传输周期（如果适用）的时候）没有重试请求提供了分组是 收到没有错误。