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Protection method and system for TD-LTE service

A technology for services and equipment, applied in the field of time-sharing and long-term evolution, which can solve problems such as failure to achieve protection, affecting PTN aggregation ring services, and difficulty in ensuring the security requirements of TD-LTE services.

Inactive Publication Date: 2017-06-30
中国移动通信集团内蒙古有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] With the large-scale development of TD-LTE services, the existing PTN bearer network protection methods are difficult to guarantee the security requirements of TD-LTE services, which are mainly reflected in the following aspects: 1) When the OTN network is interrupted, the PTN reports a large number of alarms: When the OTN network is interrupted, because the PTN services carried on the OTN are not protected, multiple ETH_LOS alarms are reported on the PTN, which is not conducive to fault diagnosis and maintenance
2) The same routing of LTE services is unavoidable: Since the OTN network is a simple ring structure, it is unavoidable that the services from each aggregation node to the core equipment building on the PTN ring will overlap in physical routes
Therefore, when one of the fibers on the OTN is cut, it will affect the services of multiple aggregation rings on the PTN.
If both the working and protection channels of MC-PW APS protection on the PTN are affected at the same time, the service will be interrupted
3) Faults on the opposite side of the intersecting ring and different rings cannot achieve protection: if the optical cable is blocked or the node fails on the opposite side of the PTN intersecting ring, the MC-PW APS protection will fail

Method used

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  • Protection method and system for TD-LTE service

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Embodiment 1

[0028] In order to solve the technical problems existing in the aforementioned background technology, the embodiment of the present invention provides a protection method for OTN+PTN carrying TD-LTE services, figure 2 It is a schematic diagram of OTN+PTN bearing TD-LTE service in the embodiment of the present invention, as figure 2 As shown, the OTN+PTN bearer TD-LTE service in the embodiment of the present invention is mainly divided into the following parts:

[0029] The first part, the business layer;

[0030] The service layer L3 PTN and the core network form VRRP dual-homing protection for MME / SGW. A VRRP protection group is established based on the L3 PTN virtual interface, and Node B and Node D are virtualized as the active and standby gateways of the MME / SGW. The MME / SGW implements link-side service switching through Layer 2 link bundling protection. When the active gateway B fails, services are switched from the active gateway B-MME / SGW to the standby gateway D-M...

Embodiment 2

[0051] Based on the aforementioned first embodiment, the embodiment of the present invention provides a method for protecting TD-LTE services based on the OTN+PTN networking architecture, Figure 7 It is a schematic diagram of the implementation flow of the TD-LTE service protection method based on the OTN+PTN networking architecture of Embodiment 2 of the present invention, as Figure 7 As shown, the method includes:

[0052] Step S701, using optical transport network and packet transport network OTN+PTN to carry time-division long-term evolution TD-LTE services;

[0053] Step S702, configuring optical channel data unit k subnet connection protection ODUkSNCP in the OTN;

[0054] Here, the k is an integer, for example, ODUk can be ODU0, ODU2, etc.;

[0055] Step S703, when the core layer and / or the aggregation layer of the OTN fails, the TD-LTE service is switched to the network layer of the OTN through the ODUkSNCP, so that the PTN network has no perception.

[0056] Here...

Embodiment 3

[0064] Figure 8 It is a schematic diagram of the network of three anti-multi-point faults in the embodiment of the present invention, as follows Figure 8 As an example, a detailed analysis of the network multi-point failure capability in three cases:

[0065] 1) On the same layer and on the same side, a node fails and an optical cable is blocked on the same side of the access layer (when node 1 and node 2 fail at the same time), node 1 and node 4 are used as fault detection points to trigger the ring network protection switching application, The roundabout path is: node 1→node 3→node 5→node 4→node 6→node 8→node 10.

[0066] 2) On the same side of different layers, an optical cable failure occurs at the access layer (node ​​2 failure), and at the same time, a PTN node failure occurs at the aggregation layer (node ​​3 failure), and nodes 2, 4 and 6 are used as fault detection points to trigger the ring For network protection switching application, the detour path is: node 1→...

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Abstract

The invention discloses a protection method and system for TD-LTE (Time Division Long Term Evolution) service. The method comprises the steps of bearing the time division long term evolution TD-LTE service through adoption of an optical transmission network and a packet transmission network OTN+PTN; configuring optical channel data unit k subnetwork connection protection ODUk SNCP in the OTN; and when a fault occurs in a core layer and / or a convergence layer of the OTN, switching the TD-LTE service to a network layer of the OTN through the ODUk SNCP, thereby enabling the PTN network to be senseless.

Description

technical field [0001] The present invention relates to Time Division Long Term Evolution (TD-LTE) technology, in particular to a method and system for protecting TD-LTE services. Background technique [0002] At present, the time-sharing long-term evolution service has been widely used in commercial use, and the customer's perception of the service is a key concern of operators. OTN+PTN is an important bearer network of TD-LTE, and its network survivability cannot be ignored. OTN stands for Optical Transport Network, and PTN stands for Packet Transport Network. At present, in order to realize the protection of TD-LTE services, the PTN network mainly provides protection methods such as MC-PW cross-device pseudo-wire, Multi-Chassis Pseudo Wire APS, LSP+APS and VRRP dual-homing, where PW means pseudo-wire (Pseudo Wire ), LSP stands for Label Switching Path, APS stands for Automatic Protection Switching, and VRRP stands for Virtual Router Redundancy Protocol. figure 1 It is a...

Claims

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Application Information

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IPC IPC(8): H04B10/032H04B10/035H04L12/713H04L45/586
CPCH04B10/032H04B10/035H04L45/586
Inventor 黄欢
Owner 中国移动通信集团内蒙古有限公司
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