WO2008110083A1

WO2008110083A1 - Transmission method, device and system for iub interface service transmitting based ip

Info

Publication number: WO2008110083A1
Application number: PCT/CN2008/070194
Authority: WO
Inventors: Weiping Yan; Zhiquan Chang; Chengxu Guo; Shengyi Qin; Wei Ren; Shaocheng Xiong
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-03-12
Filing date: 2008-01-28
Publication date: 2008-09-18
Also published as: CN101026798A; CN100551104C

Abstract

A transmission method and device for an Iub interface service transmitting based IP are provided. The different services perform the separate-way transmission corresponding to the different transmission links, and a transmission link corresponding to a type of service acts as the main transmission link of the service, while other transmission links act as the backup transmission links of the service, and every type of service corresponds to a certain priority. When the service is transmitted, monitoring the main transmission link and the backup transmission links of the service in real time; when it is monitored that the main transmission link interrupts while the backup transmission links work normally, performing the route switch for the service over the main transmission link and performing the service transmission over the backup transmission links.

Description

Iub interface service transmission method, device and system based on IP transmission

[1] Technical field

[2] The present invention relates to the field of communications technologies, and in particular, to an Iub interface service transmission method, apparatus, and system based on IP transmission.

[3] Background of the invention

[4] With High Speed Downlink Packet Access (referred to as High Speed Downlink Packet Access, referred to as

HSDPA) technology and the development of High Speed Uplink Packet Access (HSUPA) technology, wireless access networks based on Wideband Code Division Multiple Access (WCDMA) technology are gradually adopting the traditional asynchronous transfer mode (ATM). The network evolved into an Internet Protocol (IP)-based transport network.

[5] Due to the different network conditions of different operators, and based on the consideration of networking costs, the construction based on WC

In the DMA technology wireless access network, most operators will not use pure Ethernet access, and existing transmission network resources will continue to be used. At the same time, the operator will use different transmission networks to carry the transmission for different services according to different requirements of quality of service (QoS). Based on the above reasons, the Iub interface between the base station and the radio network controller forms a split transmission network in the case of IP transmission, as shown in FIG.

[6] In the scenario depicted in Figure 1, high QoS transmission services may take the form of a synchronous digital communication network (SD)

H) Or based on a multiplexed-division technology communication network (TDM), where low-QoS transmission services may go through the Ethernet network, so that the Iub between the base station and the radio network controller

The physical layer interfaces of multiple access modes appear on the interface, such as interfaces such as El, FE, POS, CPOS, and GE.

[7] How to ensure the reliability of network transmission between these interfaces of different physical layers becomes the key to ensure the normal operation of the wireless access network. For example, in the networking of E1+FE, if there is a problem with one of the two interfaces, then The services carried on the interface are interrupted, which is unacceptable to the operator. How to protect the operator's communication network from running normally, especially when there is a problem in the network, it can ensure that the service can not be interrupted, which becomes a problem that operators pay more attention to. [8] In the prior art, in the prior art, there is no reliable solution for transmitting traffic between the base station and the radio network controller to ensure the reliability of different physical layer interface service transmission between the base station and the radio network controller. And stability.

[9] Summary of the invention

[10] The main technical problem to be solved by the embodiments of the present invention is to provide a method, device and system for transmitting lub interface services based on IP transmission, thereby ensuring reliability and stability of service transmission between a base station and a radio network controller. .

An embodiment of the present invention provides a method for transmitting a lub interface service based on IP transmission, including:

[12] The main transmission link and backup transmission link of the monitoring service;

[13] When it is detected that the primary transmission link is interrupted and the backup transmission link is normal, the service on the primary transmission link is switched, and the service transmission is performed on the backup transmission link.

An embodiment of the present invention further provides a lub interface service transmission apparatus based on IP transmission, and a communication system including the apparatus, the apparatus comprising:

[15] Monitoring module, which is used to implement the primary transmission link and backup transmission link of the monitoring service;

[16] The switching module is configured to perform routing switching on the service on the primary transmission link when the monitoring module detects that the primary transmission link is interrupted and the backup transmission link is normal;

[17] The transmission module is configured to perform service transmission on the backup transmission link according to the routing result of the switching module.

[18] It can be seen from the technical solution provided by the foregoing embodiments of the present invention that, in the embodiment of the present invention, the primary transmission link and the backup transmission link of the monitoring service are implemented; when the primary transmission link is interrupted, the backup transmission chain is detected. The path is normal, the service on the primary transmission link is switched, and the service is transmitted on the backup transmission link, thereby improving the reliability and stability of service transmission between the base station and the radio network controller.

[19] BRIEF DESCRIPTION OF THE DRAWINGS

[20] FIG. 1 is a schematic diagram of service transmission between a base station and a radio network controller in the prior art;

2 is a flowchart of a method for transmitting a lub interface service based on IP transmission according to a first embodiment of the present invention; [22] FIG. 3 is a bidirectional link used in the method according to the first embodiment of the present invention; Schematic diagram of the monitoring method of forward monitoring technology;

FIG. 4 is a schematic structural diagram of a lub interface service transmission apparatus based on IP transmission according to a second embodiment of the present invention; FIG. Figure.

Mode for carrying out the invention

In order to make the objects, the technical solutions and the advantages of the present invention more comprehensible, the present invention will be further described in detail with reference to the accompanying drawings.

In the IP transmission-based Iub interface service transmission method provided by the embodiment of the present invention, different services correspond to different transmission links for branch transmission, and a service corresponding transmission link serves as a primary transmission link of the service, and other The transmission link serves as a backup transmission link for the service, and each service corresponds to a certain priority.

It can be understood that different services can be used for different transmission links for branch transmission according to different quality of service requirements (QoS). If there are multiple backup transport chains, multiple backup transport links have a priority relationship, and the priority relationship decreases in turn.

For example, in a specific application, for a voice service with a strong requirement and a high service priority, the transmission link to which the corresponding interface E1 belongs may be used as the primary transmission link, and other transmission links, such as the interface FE. The associated transmission link acts as a backup transmission link for the voice service. It should be noted that the transmission link to which the interface FE belongs belongs to the data transmission service corresponding to the non-reality requirement and the service priority lower, and the data transmission service is normal. Or use the transmission link to which the interface FE belongs to perform normal transmission. The transmission link may specifically include: a physical layer interface El, FE, POS, CP OS, a transmission link to which the GE belongs, or a transmission link to which other physical layer interfaces belong.

For the cost of networking, the number of primary and backup transmission links can be one primary, one backup, or two transmission links, but can also be set as one primary and secondary backup, three transmission links, or one primary. Several backups, several plus one transmission link, depending on the specific situation and technology development.

You can add the priority relationship of the service to the primary and backup transport links to the routing table. In this case, the key items included in the routing table can be as follows: The destination address identifies the destination address or destination network of the IP packet.

Network Mask Together with the destination address, it identifies the address of the network segment where the destination host or router is located. Output Interface Description Which packet will be forwarded from the router?

Next hop IP address Description Next router through which the IP packet passes

IPs for the same destination, there may be several routes with different next hops. The priorities of these non-routing routes may be discovered by different routing protocols or manually configured static routes. High priority (small value) will become the current optimal route

[32] The first embodiment of the present invention provides an Iub interface service transmission method based on IP transmission. The technical solution of the embodiment is as follows: E1+FE networking scenario, in E1 +FE

In the split transmission solution, the E1 transmits the actual services such as the clock and the voice (hereinafter, the description is convenient, only refers to the voice service), and the FE transmits the non-real data service, and the reliability schemes between the other interfaces are similar. The specific process is shown in Figure 2:

[33] Step 1: Really monitor the primary and backup transmission links of the service.

[34] Under normal circumstances, the service to be transmitted uses its corresponding primary transmission link for service transmission. For example, for voice services, the transmission link to which the corresponding E1 interface belongs is used as the primary transmission link for service transmission. The transmission link to which the FE interface belongs is used as its backup transmission link. For the non-real data service, the transmission link to which the corresponding FE interface belongs is used as the primary transmission link for service transmission, and the transmission link to which the E1 interface belongs is used as its transmission link. Back up the transmission link.

[35] During the transmission process, the primary transmission link and the backup transmission link of the service are monitored. In the technical solution provided by this embodiment, the base station (Node-B) or the radio network controller (RNC) may perform bidirectional link forward detection technology (BFD) to perform real-time monitoring on the primary and backup transmission links. Ethernet OAM can be used (Operations, Administration and

Maintenance, operation, management and maintenance) Technology monitoring, or by Ping (Packet Internet)

Groper, Packet Internet Detector) Commands are monitored, either through physical layer connectivity or other monitoring techniques for transmission link monitoring.

[36] Take BFD as an example for real-time monitoring of primary and backup transmission links. The process diagram is shown in Figure 3. When the Node-B or the RNC does not receive the BFD control packet for three consecutive times, the main transmission link is reported to be interrupted.

[37] Step 2. When the primary transmission link is interrupted and the backup transmission link is normal, the service on the primary transmission link is switched.

[38] If the Node-B or RNC detects the interruption of the primary transmission link, it needs to perform route switching on the service on the primary transmission link. In the case that there are multiple backup transmission links, after the route switching, the priority of the backup transmission link is sequentially performed from high to low, that is, the priority is switched to the highest priority and normal backup transmission link. . In this embodiment, it is assumed that the primary transmission link where the voice service is located is interrupted, and the backup transmission link is normal, and only one backup transmission link, such as the transmission link to which the FE interface belongs, needs to perform routing switching of the voice service.

[39] The route switching method is to compare the priority of the service on the primary transmission link with the priority of the service on the backup transmission link, and preferentially ensure the transmission of the high priority service on the backup transmission link. If the priority of the service on the primary transmission link is higher, the service on the primary transmission link is switched to the backup transmission link; if the priority of the service on the primary transmission link is lower, the backup transmission chain is calculated. The remaining bandwidth of the path is route-switched to the service on the primary transmission link according to the remaining bandwidth.

[40] In the embodiment of the present invention, the voice service transmitted on the primary transmission link has a higher priority than the service of the backup transmission link, so the voice service is switched to the backup transmission link.

The technical solution provided by the embodiment of the present invention may further include the following steps: when the priority of the service on the primary transmission link is high, the service on the primary transmission link is switched to the backup transmission link. After that, calculating the remaining bandwidth of the backup transmission link; if the priority of the service on the primary transmission link is high, switching the service on the primary transmission link to the backup transmission link, if the primary transmission link If the service on the primary transmission link is greater than the bandwidth of the backup transmission link, the service on the primary transmission link is split and the route is switched. The service on the primary transmission link has a lower priority. In this case, the service on the primary transmission link is switched according to the remaining bandwidth of the backup transmission link. If the backup transmission link has no remaining bandwidth, the service on the primary transmission link is not switched, and the backup transmission is performed. The link also has remaining bandwidth, and then switches the traffic on the primary transmission link that matches the remaining bandwidth.

[42] In this embodiment, after the voice service is switched to the backup transmission link, the remaining bandwidth of the backup transmission link may be calculated to determine whether the data service on the original backup transmission link can also be transmitted.

[43] Step 3: According to the result of the route switching, perform service transmission on the backup transmission link. [44] The way in which traffic is transmitted on the backup transport link is based on the different conditions of the result of the route switch in step 2. For example, if the priority of the service on the primary transmission link is high, after the service on the primary transmission link is switched to the backup transmission link for transmission, if the backup transmission link has remaining bandwidth, the calculation is performed. The remaining bandwidth of the transmission link is backed up, and the remaining bandwidth is used to transmit the traffic on the backup transmission link. When the priority of the service on the primary transmission link is high, the service on the primary transmission link is switched to the backup transmission link. If the service on the primary transmission link is greater than the bandwidth of the backup transmission link, The service on the primary transmission link is split based on the bandwidth of the backup transmission link, and is transmitted on the backup transmission link after being split. When the priority of the service on the primary transmission link is low, the method for routing the service on the primary transmission link according to the remaining bandwidth of the backup transmission link is: If the backup transmission link has no remaining bandwidth, then The service on the primary transmission link is switched. If the backup transmission link has remaining bandwidth, the service on the primary transmission link that matches the remaining bandwidth is switched and transmitted on the backup transmission link.

[45] Specifically, in the scenario of the embodiment, after the voice service is switched to the backup transmission link, it is assumed that the remaining bandwidth of the backup transmission link is 2M, and the service on the original backup transmission link is transmitted. That is, non-real data services. If there is no remaining, the transmission of the service on the original backup transmission link is interrupted.

[46] It is worth mentioning that after the interrupted primary transmission link returns to normal, the primary transmission link is preferentially used to transmit its corresponding service, and the network transmission state before the handover is restored.

In the technical solution of the embodiment of the present invention, the service on the primary transmission link refers to the service transmitted on the primary transmission link, and the service on the backup transmission link refers to the service transmitted on the backup transmission link. However, it is also understandable that the technical solution can be extended to include the primary transmission link and the backup transmission link to be accessed. It is also the use of priority comparison for route switching, and then transmission.

[48] The method provided by the embodiment of the present invention detects the primary transmission link and the backup transmission link corresponding to a certain service on the premise of the service split transmission, and performs backup transmission when the primary transmission link is interrupted. After the link is normal, the service on the primary transmission link is switched, and the service is transmitted on the backup transmission link. Thereby improving the reliability and stability of the Iub interface service transmission based on IP transmission.

The method provided by the embodiment of the present invention is very flexible in realizing the method of monitoring the primary transmission link and the backup transmission link of the service, and realizing the detection of network anomalies in a short period of time.

[50] The method provided by the embodiment of the present invention, by calculating the remaining bandwidth of the backup transmission link, and performing according to the Switching routing or transmission services enables full utilization of the transmission resources of the backup transmission link.

The method provided by the embodiment of the present invention may be based on different QoS or other requirements for different services, and may be adapted to different requirements, and stipulates multiple processing rules of the backup transmission link, and implements different scenarios. application.

[52] The second embodiment of the present invention provides an Iub interface service transmission apparatus based on IP transmission, and FIG. 4 is a schematic structural diagram of the apparatus.

[53] The device may specifically include a monitoring module, a switching module, and a transmission module, where:

[54] First, the monitoring module is used to implement the main transmission link and backup transmission link of the monitoring service.

[55] In this embodiment, the method for monitoring the primary transmission link and the backup transmission link of the monitoring service may be: transmitting BFD control packets for monitoring; or monitoring by using Ethernet OAM technology.

Or monitor by ping command; or through physical layer connectivity, or other monitoring methods to monitor the transmission link.

[56] Second, the switching module is used when the monitoring module detects that the main transmission link is interrupted and the backup transmission link is normal.

, routing the service on the primary transmission link.

[57] In the solution provided in this embodiment, the basis for distinguishing different services is different QoS. If there are multiple backup transmission links, the switching module performs routing switching on the services on the primary transmission link, according to The corresponding priority of the backup transmission link is sequentially performed from high to low.

[58] In this embodiment, the switching module may specifically include:

[59] 1. The priority comparison unit is configured to compare the priority of the service on the primary transmission link with the priority of the service on the backup transmission link.

[60] 2. The switching unit is configured to switch the service on the primary transmission link to the backup transmission link when the comparison result of the priority comparison unit is that the priority of the service on the primary transmission link is higher. The comparison result of the priority comparison unit is that the priority of the service on the primary transmission link is lower, and the service on the primary transmission link is route-switched according to the remaining bandwidth of the backup transmission link;

[61] The switching unit is further configured to: if the priority of the service on the primary transmission link is lower, if the backup transmission link has no remaining bandwidth, the service on the primary transmission link is not switched, if there is any remaining Bandwidth, then switch the traffic on the primary transport link that matches the remaining bandwidth to the backup transport link.

[62] 3. The remaining bandwidth calculation unit is used when the comparison result of the service priority comparison unit is the primary transmission link. The service on the lower priority, calculate the remaining bandwidth of the backup transmission link;

[63] The remaining bandwidth calculation unit is further configured to calculate the backup after the switching unit switches the service on the primary transmission link to the backup transmission link in a case where the priority of the service on the primary transmission link is high. The remaining bandwidth of the transmission link.

[64] The switching module can further include:

[65] 4. The split processing unit is configured to switch the service on the primary transport link to the backup when the comparison result of the priority comparison unit is that the priority of the service on the primary transmission link is high. On the transmission link, if the service on the primary transmission link is greater than the bandwidth of the backup transmission link, the service on the primary transmission link is split based on the bandwidth of the backup transmission link;

[66] The split processing unit is further configured to split the low priority service out of the part of the service that matches the remaining bandwidth according to the remaining bandwidth of the high priority service in the backup transmission link, and use the backup transmission link to transmit .

[67] The transmission module is configured to perform the transmission of the service on the backup transmission link according to the route switching result of the switching module.

[68] In this embodiment, the transmission module may specifically include physical layer interfaces El, FE, POS, CPOS,

The transmission link to which the GE belongs, or the transmission link to which other physical layer interfaces belong.

[69] The transmission module may further comprise a transmission unit of the primary transmission link, corresponding to the respective physical layer interface of the primary transmission link, transmitting the corresponding service.

[70] The remaining bandwidth calculation unit and the split processing unit included in the apparatus provided in this embodiment may also be disposed in the apparatus as an independent module of the apparatus.

[71] The apparatus provided in this embodiment may be disposed in a base station or a radio network controller. The device can be included in a communication system.

[72] The device provided by the embodiment of the present invention detects the primary transmission link and the backup transmission link corresponding to a certain service on the premise of the service split transmission, and performs backup transmission when the primary transmission link is interrupted. After the link is normal, the service on the primary transmission link is switched, and the service is transmitted on the backup transmission link. Thereby improving the reliability and stability of the Iub interface service transmission based on IP transmission.

The device provided by the embodiment of the present invention has a very flexible manner of monitoring the primary transmission link and the backup transmission link of the service, and implements detection of network anomalies within a short period of time. The device provided by the embodiment of the present invention realizes full utilization of the transmission resources of the backup transmission link by calculating the remaining bandwidth of the backup transmission link and performing handover routing or transmission services accordingly.

The device provided by the embodiment of the present invention may be based on different QoS or other requirements for different services, and may be adapted to different requirements, and stipulates multiple processing rules of the backup transmission link, and implements different scenarios. application.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any person skilled in the art can easily think of within the technical scope disclosed by the present invention. Changes or substitutions are intended to be included within the scope of the invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

Claim

[1] 1. An Iub interface service transmission method based on IP transmission, characterized in that the method comprises the following steps:

Really monitoring the primary transmission link and the backup transmission link of the service;

When the primary transmission link is interrupted and the backup transmission link is normal, the service on the primary transmission link is switched, and the service is transmitted on the backup transmission link.

[2] 2. The method according to claim 1, wherein the service has one or more types, each service is transmitted on its corresponding transmission link, and a service corresponding transmission link is used as The primary transmission link of the service, the other transmission link serves as the backup transmission link of the service, and each service corresponds to a certain priority.

[3] The method according to claim 1, wherein the method for monitoring the primary transmission link and the backup transmission link of the service is:

Monitor by sending BFD control packets.

Or monitoring via Ethernet OAM technology;

Or monitor by ping command;

Or monitor through the connectivity of the physical layer.

[4] The method according to claim 2, wherein the routing of the service on the primary transmission link comprises:

Comparing the priority of the service on the primary transmission link with the priority of the service on the backup transmission link; if the priority of the service on the primary transmission link is higher, switching the service on the primary transmission link to the backup transmission On the link, if the service on the primary transmission link is greater than the bandwidth of the backup transmission link, the service on the primary transmission link is split and the route is switched based on the bandwidth of the backup transmission link.

If the priority of the service on the primary transmission link is lower, the remaining bandwidth of the backup transmission link is calculated, and the service on the primary transmission link is switched according to the remaining bandwidth.

[5] The method according to claim 4, wherein the transmitting the service on the backup transmission link comprises:

Transferring traffic to the primary transport link on the backup transport link, where the primary transport If the service on the link has a higher priority, if the service on the primary transmission link is greater than the bandwidth of the backup transmission link, the service on the primary transmission link that is split will be on the backup transmission link. transmission.

[6] 6. The method according to claim 4, wherein the method further comprises:

If the priority of the service on the primary transmission link is high, and the service on the primary transmission link is switched to the backup transmission link, and the backup transmission link has remaining bandwidth, the remaining bandwidth is used to transmit the backup transmission. The service of the link transmission.

[7] The method according to any one of claims 1 to 6, characterized in that the basis for distinguishing the different services is different quality of service requirements QoS.

[8] The method according to any one of claims 1 to 6, wherein, if there are multiple backup transmission links, corresponding to the backup transmission link according to the routing switch The levels are performed sequentially from high to low.

[9] 9. An Iub interface service transmission device based on IP transmission, characterized in that: the device comprises: a monitoring module, configured to implement a primary transmission link and a backup transmission link for monitoring the service; When the monitoring module detects that the primary transmission link is interrupted and the backup transmission link is normal, and performs routing switching on the service on the primary transmission link;

And a transmission module, configured to perform the transmission of the service on the backup transmission link according to the route switching result of the switching module.

[10] The device according to claim 9, wherein the switching module comprises: a priority comparison unit, configured to compare a priority of a service on a primary transmission link with a priority on a backup transmission link. Priority of business;

a remaining bandwidth calculation unit, configured to calculate, when the comparison result of the service priority comparison unit is that the priority of the service on the primary transmission link is lower, calculate a remaining bandwidth of the backup transmission link; The comparison result of the priority comparison unit is that the priority of the service on the primary transmission link is higher, and the service on the primary transmission link is switched to the backup transmission link, when the priority comparison unit The result of the comparison is that the priority of the service on the primary transmission link is lower, and the service on the primary transmission link is route-switched according to the remaining bandwidth of the backup transmission link.

[11] The device according to claim 10, wherein the switching module further comprises: a split processing unit, configured to: when the comparison result of the priority comparison unit is a service on a primary transmission link If the priority is higher, the service on the primary transmission link is switched to the backup transmission link. If the service on the primary transmission link is greater than the bandwidth of the backup transmission link, the bandwidth of the backup transmission link is Benchmark, splits the traffic on the primary transport link.

[12] 12. The device according to claim 10, wherein the remaining bandwidth calculation unit is further configured to: when the priority of the service on the primary transmission link is high, the primary transmission link is The remaining bandwidth of the backup transmission link after the service is switched to the backup transmission link.

[13] 13. The device according to any one of claims 9 to 12, wherein the service has one or more types, and each service is transmitted on its corresponding transmission link, and a service corresponds to The transmission link serves as the primary transmission link of the service, and the other transmission links serve as the backup transmission link of the service, and each service corresponds to a certain priority.

[14] 14. A communication system, comprising the apparatus according to any one of claims 9 to 13