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 u

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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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