WO2005015836A1 - Switching system and switching method based on the switching of service grade - Google Patents
Switching system and switching method based on the switching of service grade Download PDFInfo
- Publication number
- WO2005015836A1 WO2005015836A1 PCT/CN2004/000464 CN2004000464W WO2005015836A1 WO 2005015836 A1 WO2005015836 A1 WO 2005015836A1 CN 2004000464 W CN2004000464 W CN 2004000464W WO 2005015836 A1 WO2005015836 A1 WO 2005015836A1
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- WO
- WIPO (PCT)
- Prior art keywords
- service
- frame
- rpr
- service level
- mac address
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/20—Support for services
- H04L49/205—Quality of Service based
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/25—Routing or path finding in a switch fabric
Definitions
- the present invention relates to data communication technology, and in particular, to a flexible packet ring (RPR) technology of a metropolitan area network, and in particular, it relates to adapting an Ethernet service to three types of service levels in the RPR technology to System and method for scheduling at different service levels.
- RPR flexible packet ring
- Resilient packet ring RPR technology is an emerging technology, the purpose of which is to build a bandwidth with reusable bandwidth, each site has a fair algorithm to ensure the bandwidth occupancy of each site, with ring protection and quality of service (QoS) ) Capable data transmission networks, which are mainly targeted at metropolitan backbone ring networks and city i or access ring networks.
- QoS quality of service
- the services are divided into three categories: people, B, and C, of which A is real-time services; B is divided into two categories: B-CIR (Committed Information Rate) For committed rate class services, B-EIR (Excess Information Rate) is a service that exceeds the committed rate class; Class C is a best effort service.
- B-CIR Committed Information Rate
- B-EIR Excess Information Rate
- Class C is a best effort service.
- the above three types of services are distinguished by the Service Class defined in the frame structure.
- the technical problem to be solved by the present invention is to provide a switching system based on service level switching and A switching method, including a service level-based switching and bridging system between an Ethernet system and an elastic packet ring network, and a service level-based scheduling system, including a service classification method for cooperating Ethernet services into an elastic packet ring network and coexistence
- a switching system based on service level switching includes multiple RPR devices.
- the RPR device includes two RPR ring-side ports and a group of user-side ports.
- the RPR device forms an RPR ring through the RPR ring-side ports.
- the user-side port sends and receives Ethernet service frames; characterized in that the RPR device further includes an RPR frame processing unit, a service classification processing unit, a ring switching unit, and a scheduling unit; the RPR frame processing unit is configured to The RPR frame received by the RPR loop-side port $ ⁇ is processed, and the RPR frame is distributed to the corresponding user-side port or sent to the primary transmission queue or secondary transmission queue according to whether the RPR frame is a downlink service of the site.
- the service classification processing unit is configured to classify an Ethernet service frame input from a user-side port into a service level, and send the service class to a corresponding service queue;
- the ring switching unit is configured to select an output ring of a service frame, and send the service frame to a service queue at a corresponding level of the output ring to wait in a queue;
- the scheduling unit is configured to uniformly schedule the service frames in the primary transmission queue and the secondary transmission queue, and the service frames in the service queues of different levels on the output ring, and output them through the RPR loop-side port.
- the service level switching-based switching system further includes a set of service classification mode configuration registers corresponding to the user-side port of the RPR device; the service classification mode configuration register is used to store the service classification of the corresponding user-side port Mode, providing the service classification processing unit with a classification mode of a service frame input from a corresponding user-side port.
- a switching method based on service level switching includes: Step 1: Determine whether the RPR frame is a loop-down service of the site according to the destination address of the RPR frame input from the RPR loop. If so, distribute the RPR frame to the corresponding user-side port; if not, then Send the RPR frame to the primary sending queue or the secondary sending queue according to the service level of the RPR frame; go to step four;
- Step 2 Classify the service level of the Ethernet service frame input from the user-side port;
- Step 3 Select the output ring of the service frame and send the service frame to the service queue at the corresponding level of the output ring;
- Step 4 The service frames in the primary transmission queue and the secondary transmission queue, and the service frames in the service queues of different levels of the output ring are uniformly scheduled, and output to the corresponding RPR ring.
- the switching system and switching method based on service level switching of the present invention realizes bridging of Ethernet services and RPR loops by classifying services and uniformly scheduling all services, and provides an effective RPR technology Switching system and switching method, the present invention can integrate a variety of service classification technologies, classify end users and perform different processing on different levels of services, thereby providing different services and prices for different levels of users. Multiple strategies.
- FIG. 1 is a schematic structural diagram of an exchange system of the present invention
- FIG. 2 is a schematic flowchart of an exchange method according to the present invention.
- the switching system based on service level switching of the present invention includes an RPR ring composed of multiple RPR devices.
- the RPR device includes an RPR frame processing unit, a service classification processing unit, a ring switching unit, a scheduling unit, Two RPR loop-side ports and a set of user-side ports.
- the frames input and output from the RPR loop-side ports are RPR frames, and the RPR frames carry the service level classification identifier, indicating that The service level of the RPR frame is human, B, or C; and the user-side port is generally an Ethernet port.
- the frames input and output from this port are Ethernet frames, and the frame structure does not include A, B, and C service level classifications.
- logo Multiple RPR devices form an RPR ring through the RPR loop-side port.
- the main working modes of the RPR device are switching mode and routing mode. The following embodiments are classified for services in the switching mode, but they are also applicable to the routing mode.
- RPR equipment is classified for services in the switching mode, but they are also
- the RPR frame input from the RPR loop-side port is processed in the RPR frame processing unit, and the RPR frame processing unit judges whether the RPR frame is a loop-down service of the site according to the destination MAC address of the RPR frame. If yes, then According to the extended destination address in the RPR frame structure and the MAC address table of the correspondence between the destination MAC address and the user-side port, the RPR frame is distributed to the corresponding user-side port. If the RPR frame is not a downlink service of the site, the RPR frame is placed in the primary transmission queue PTQ or the secondary transmission queue STQ according to its service level classification identifier.
- the Ethernet service frame input from the user-side port of the RPR device is classified by the service classification processing unit into A / B / C service levels.
- the service frame classified by the service level is output to the ring switching unit, and the ring switching unit selects the output ring of the service frame, and outputs the service frame to the corresponding level service queue of the corresponding output ring, waiting for scheduling.
- the services in the primary transmission queue PTQ and the secondary transmission queue STQ and the services in the output ring A, B, and C three-level service queues are uniformly scheduled by the scheduling unit and output from the RPR loop-side port.
- the service classification processing unit performs classification processing on the Ethernet service frame in two ways. One is to classify the Ethernet service frames directly. Because the Ethernet frame structure does not carry the service level classification identifier of the RPR, it is necessary to classify according to the information of the Ethernet frame header, and put the corresponding service level identifier into the Ethernet. In the control field corresponding to the service frame, the Ethernet service frame is then converted into an RPR frame before scheduling. The other is to convert the Ethernet service frame into an RPR frame before classifying the service level. At this time, the service level identifier in the RPR frame is given a default service level, such as a class C service. Then, a service level classification process is performed, and a service level identifier in the RPR frame is re-assigned.
- a default service level such as a class C service.
- a set of service classification mode configuration registers may also be included, corresponding to each user-side port, and used to store the service-level classification mode of each user-side port.
- the service classification processing unit queries the service classification mode configuration register corresponding to the port, obtains the service classification mode of the service frame input from the port, and then the service classification processing unit Business classification is performed according to the corresponding business classification model.
- FIG. 2 shows a flow chart of a switching method based on service level switching according to the present invention.
- a service frame is input from an RPR loop-side port or a user-side port. If it is input from an RPR loop-side port, then Perform RPR frame processing; if it is a service frame input from a user-side port, perform service classification processing and ring exchange processing; and finally, perform scheduling processing on the above service frame.
- RPR loop-side port a user-side port
- the step of processing the RPR service frame input from the RPR ring-side port includes: determining whether the RPR frame is a ring service of the site according to the destination MAC address of the RPR frame, and for the ring service of the site, Distribute the RPR frame to the corresponding user-side port. For non-loop services on the site, send the RPR frame to the primary transmission queue PTQ or secondary transmission queue STQ according to the service class classification identifier. If it is class A The service is sent to the primary transmission queue PTQ; for the type B and C services, it is placed in the secondary transmission queue STQ.
- Classifying the Ethernet service frames input from the user-side port refers to classifying the A / B / C service levels of the Ethernet service frames corresponding to the RPR ring.
- Ethernet service frames There are two types of processing methods for Ethernet service frames. One is to directly classify the Ethernet frames, and then convert the Ethernet frames into RPR frames before performing the scheduling operation. One is to convert the Ethernet frame into an RPR frame before classifying the service level. That is, a new RPR frame is created, and the content of the Ethernet frame is filled into the corresponding part of the RPR frame. At this time, the services carried in the RPR frame Wait The level identifier is assigned a default service level identifier value, such as a class C service, and then the service level classification process is performed, and the value is re-assigned.
- a default service level identifier value such as a class C service
- Ethernet service frames There are several methods for classifying Ethernet service frames: port-based service classification methods; virtual LAN identification VLAN ID-based service classification methods; source / destination MAC address group-based service classification methods; and IEEE802. 17 A method for classifying the mapping of the IEEE 802.3 Class of Service (COS) bits and the IEEE 801.7 A, B, and C services formulated in the standard.
- COS Class of Service
- the port-based service classification method refers to classifying services according to the port number of the user-side port of the input service frame. Specifically, a default service category configuration item is set for each user-side port, as shown in Table 1.
- a service frame input from a user-side port is configured with a service level according to a default service category configuration item of the port. If the default service class of the port is 00, the service frame of the port is classified as a class C service; if the default service class of the port is 01, the service frame of the port is classified as a class B service;
- the provincial service category is 10, and the service frame of the port is classified as A1 service; if the default service category of the port is 11, the service frame of the port is classified as AO service.
- Class A services are divided into two sub-categories, A1 and AO. Among them, the class of AO services is higher.
- the VLAN ID-based service classification method refers to classifying according to the virtual LAN identification VLAN ID number carried by the service frame input from the user-side port. Specifically, the mapping table of the VLAN ID number and the service level is set, as shown in Table 1. The service frame input from the user-side port is configured to the corresponding service level according to the mapping of the VLAN ID number and the service level carried by the user frame. If the service frame is marked with 802.1Q and the VLAN ID is valid, the VLAN ID number is used for service classification; if the VLAN ID is invalid, query Table 3 to obtain the default VLAN ID number of the user-side port. And use it as the VLAN ID number of the service frame, and then classify the service.
- the service frame of the port is classified as a class C service; if the VLAN ID is 01, the service frame of the port is classified as a class B service; if the VLAN ID is 10, the port The service frame of the port is classified as a type A1 service; if the VLAN ID number is 11, the service frame of the port is classified as a type of AO service.
- the service classification method based on the source / destination MAC address group is to classify the service frame according to the source MAC address and the destination MAC address carried in the service frame. Specifically, it sets the mapping table between the source / destination MAC address group and service class As shown in Table 4, the source / destination MAC address group can be a MAC-MAC (that is, the source MAC address and the destination MAC address are specific) type MAC address group or MAC-ANY (that is, the source MAC address is specific, However, the destination MAC address is arbitrary) type MAC address group or ANY-MAC (that is, the destination MAC address is specific, but the source MAC address is arbitrary) type MAC address group.
- the service frame input from the user-side port is according to Table 4.
- the mapping table shown below performs service classification.
- the destination MAC address and source MAC address are extracted from the service frame input by the user-side port, and then MAC flow matching is performed.
- MAC-MAC type MAC flow matching is performed. DesMAC + SrcMAC in 4 matches. If the match is successful, the configuration value of the ServiceClas s item corresponding to the entry is used as the service level of the service frame. If the match is not successful, MAC-ANY type MAC flow matching is performed, that is, matching. Whether the source MAC address is equal to SrcMAC and the destination MAC address is equal to DesMAC equal to full F.
- the configuration value of the ServiceClass item corresponding to the entry is used as the service level of the service frame; if the match is not successful, ANY-MAC is performed Type MAC flow matching, that is, whether the source MAC address is equal to SrcMAC is equal to full F, and the destination MAC address is equal to DesMAC. If the match is successful, the configuration value of the ServiceClass item corresponding to the entry is used as the service level of the service frame, otherwise it is considered The service level of this service frame is Class C.
- SrcMAC source MAC address When the value is all F, the MAC address is arbitrary. DesMAC destination MAC address. When the value is full F, the MAC address is arbitrary.
- a method for classifying according to the mapping of IEEE802.3 service level COS bits and IEEE802.17 A, B, and C services includes: determining whether a service frame is marked with 802.1Q, and if a service frame is marked with 802.1Q, then According to the value of the COS bit in the tag, the A / B / C service mapping table of 802.1P-802.17 is searched, and the specific service classification value is obtained as the service level of the service frame; if the service frame does not carry 802 1Q flag, the value of the COS bit is considered to be 0, and then the mapping table is looked up to obtain the service level of the service frame.
- the mapping table of the 802. IP- 802. 17 A / B / C service records the correspondence between the 802.3 COS bit and the 802. 17 A / B / C service.
- the present invention also provides a preferred method based on ports, because all services enter RPR through a certain user-side port. Ring, so you can control the service classification method at the user-side port.
- a port-based service classification mode configuration register is set on each port. As shown in Table 5, when a service frame enters from a user-side port, the service classification mode configuration register of the user-side port is first queried, and then according to For the specific service classification mode, the corresponding method is used for service classification.
- the ring exchange processing is performed, including: selecting an output ring of the service frame according to the shortest path principle to the destination site, and sending the service frame to the corresponding output ring respectively.
- a / B / C service queues are waiting in the queue.
- the scheduling processing steps are for the non-local service frames entering from the RPR loop, that is, the service frames in the primary transmission queue PTQ and the secondary transmission queue STQ, and the A / B / C service queues entering from the user-side port.
- the service frames are uniformly scheduled, and the service frames are output from the corresponding output loop in the order of PTQ / STQ / A / B / C.
- service classification processing is performed first.
- the service frame is marked with 802.1Q, determine whether the VLAN ID in the tag is valid, and if it is valid, search for a VLAN ID-based service category configuration according to the VLAN ID value, and obtain a corresponding service category value as the service The service level of the frame; if it is invalid, the default VLAN ID value of the port is taken as the VLAN ID of the service frame, and a search is performed to obtain the service level of the service frame; then, go to step 7).
- the service type configuration is searched according to the source MAC address and the destination MAC address of the service frame. If a matching item is found, the service class value corresponding to the item is used as the service level of the service. Otherwise, the default service is used. Category value-category C. Then go to step 7).
- the ring selection table provides the correspondence between the destination MAC address and the RPR ring selection obtained based on the shortest path principle for the MAC address of the current RPR site of the user. Get the output RPR loop j of the service frame by looking up the table.
- the service level obtained by the service classification process is sent to the A / B / C service queue of the RPR loop j.
- step 1 1) Check which loop of the RPR the service frame enters, assuming loop k; 2) Determine whether the destination MAC address of the RPR frame of the service belongs to this site, and if yes, go to step 3), otherwise go to step 5).
- the lower ring MAC address table contains the correspondence between the MAC address and the local port, and obtain the local port number that the service frame needs to output. m.
- 802.3 frames are stripped from the RPR frame and output from the local port m. The process ends.
- the RPR frame is placed in the primary transmission queue PTQ and the secondary transmission queue STQ according to the service level in the RPR frame, of which the Class A service is placed in the PTQ, and the other services are placed in the STQ. Then the scheduling process is performed.
- Service frames of 5 queues of PTQ / STQ / A / B / C are scheduled in turn, and output from the corresponding output loop. This scheduling process follows the definition of IEEE802.17.
- the system and method of the present invention is an effective switching system for RPR technology.
- the method can integrate multiple service classification technologies, classify services to end users, and perform different processing for different levels of services, thereby different levels of services. Of users provide different services and prices bring multiple strategies.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Small-Scale Networks (AREA)
Description
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Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN03140106.6 | 2003-08-06 | ||
| CNB031401066A CN1299469C (zh) | 2003-08-06 | 2003-08-06 | 一种基于业务等级交换的交换系统及其交换方法 |
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| Publication Number | Publication Date |
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| WO2005015836A1 true WO2005015836A1 (en) | 2005-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/CN2004/000464 Ceased WO2005015836A1 (en) | 2003-08-06 | 2004-05-10 | Switching system and switching method based on the switching of service grade |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN1299469C (zh) |
| RU (1) | RU2354058C2 (zh) |
| WO (1) | WO2005015836A1 (zh) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8189471B2 (en) | 2006-01-18 | 2012-05-29 | Huawei Technologies Co., Ltd. | Method, system and optical network terminal for mapping a service flow into a service transmission channel |
| CN109952764A (zh) * | 2016-11-09 | 2019-06-28 | 瑞萨电子株式会社 | 通讯网络控制器模块 |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006099786A1 (en) * | 2005-03-25 | 2006-09-28 | Hangzhou H3C Technologies Co., Ltd. | A method for implementing on-ring process, off-ring process and data forwarding in resilience packet data ringnet and a network device thereof |
| US9461841B2 (en) * | 2006-01-06 | 2016-10-04 | Nec Corporation | Communication system, communication method, node, and program for node |
| CN101257487B (zh) * | 2006-04-25 | 2011-07-20 | 华为技术有限公司 | 一种将业务流映射到业务传输通道的方法及光网络终端 |
| CN101060392B (zh) * | 2006-09-07 | 2010-12-08 | 华为技术有限公司 | 一种传输业务数据的调度复用方法及系统 |
| CN102185781B (zh) * | 2011-05-12 | 2015-06-03 | 中兴通讯股份有限公司 | 多端口以太网接口装置及其vpn业务接入的方法 |
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| EP1303082A2 (en) * | 2001-10-15 | 2003-04-16 | Alcatel | Transparent LAN-to-LAN connection between two customer locations through a RPR data transport network |
| CN1412979A (zh) * | 2001-09-03 | 2003-04-23 | 阿尔卡塔尔公司 | 通过交换数据包而实现管理功能的方法以及相应的包帧 |
| CN1490987A (zh) * | 2002-10-18 | 2004-04-21 | ��Ϊ��������˾ | 一种在同步数字网上传送数据业务的方法 |
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| US5544163A (en) * | 1994-03-08 | 1996-08-06 | Excel, Inc. | Expandable telecommunications system |
| GB9828144D0 (en) * | 1998-12-22 | 1999-02-17 | Power X Limited | Data switching apparatus |
| US6882623B1 (en) * | 2000-02-08 | 2005-04-19 | Native Networks Technologies Ltd. | Multi-level scheduling method for multiplexing packets in a communications network |
| US7042843B2 (en) * | 2001-03-02 | 2006-05-09 | Broadcom Corporation | Algorithm for time based queuing in network traffic engineering |
| CN1165184C (zh) * | 2001-05-08 | 2004-09-01 | 华为技术有限公司 | 一种适合实现路由器服务质量的综合业务中的调度方法 |
-
2003
- 2003-08-06 CN CNB031401066A patent/CN1299469C/zh not_active Expired - Fee Related
-
2004
- 2004-05-10 WO PCT/CN2004/000464 patent/WO2005015836A1/zh not_active Ceased
- 2004-05-10 RU RU2006106707/09A patent/RU2354058C2/ru not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1412979A (zh) * | 2001-09-03 | 2003-04-23 | 阿尔卡塔尔公司 | 通过交换数据包而实现管理功能的方法以及相应的包帧 |
| EP1303082A2 (en) * | 2001-10-15 | 2003-04-16 | Alcatel | Transparent LAN-to-LAN connection between two customer locations through a RPR data transport network |
| CN1490987A (zh) * | 2002-10-18 | 2004-04-21 | ��Ϊ��������˾ | 一种在同步数字网上传送数据业务的方法 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8189471B2 (en) | 2006-01-18 | 2012-05-29 | Huawei Technologies Co., Ltd. | Method, system and optical network terminal for mapping a service flow into a service transmission channel |
| CN109952764A (zh) * | 2016-11-09 | 2019-06-28 | 瑞萨电子株式会社 | 通讯网络控制器模块 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1299469C (zh) | 2007-02-07 |
| RU2354058C2 (ru) | 2009-04-27 |
| CN1581789A (zh) | 2005-02-16 |
| RU2006106707A (ru) | 2006-08-10 |
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