DNS (domain name server) inquiring method and MME (mobility management entity)

A DNS query and type technology, applied in the field of communication, can solve problems such as communication failure and different types of IP addresses, and achieve the effect of accurate selection

Active Publication Date: 2014-01-29
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The present invention provides a DNS query method and MME to solve the problem of communication failure caused by inconsistent IP address types of the queried devices when the existing MME uses DNS to query devices

Method used

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  • DNS (domain name server) inquiring method and MME (mobility management entity)
  • DNS (domain name server) inquiring method and MME (mobility management entity)
  • DNS (domain name server) inquiring method and MME (mobility management entity)

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Embodiment 1

[0033] refer to figure 1 , shows a flowchart of steps of a DNS query method according to Embodiment 1 of the present invention.

[0034] The DNS query method of the present embodiment comprises the following steps:

[0035] Step S102: The MME receives the RR of the Naptr type returned by the DNS in response to the first s-Naptr query initiated by the MME.

[0036] Wherein, each Naptr-type RR carries information indicating the IP address type supported by the RR. The IP address type indicates whether the RR supports the IPV4 address type, the IPV6 address type, or both.

[0037] In the LTE core network, the most commonly used resource types are Naptr-type RRs and SRV-type RRs. During the DNS query process initiated by the MME, the s-Naptr type query is initiated first, and the query result may return multiple RRs of the Naptr type. A further iterative query is performed on the RR, and the result of the iterative query is to return an SRV type RR.

[0038] Step S104: The MM...

Embodiment 2

[0047] refer to figure 2 , shows a flowchart of steps of a DNS query method according to Embodiment 2 of the present invention.

[0048] The DNS query method of the present embodiment comprises the following steps:

[0049] Step S202: The MME receives the RR of the Naptr type returned by the DNS in response to the first s-Naptr query initiated by the MME.

[0050] Wherein, each Naptr-type RR carries information indicating the IP address type supported by the RR.

[0051] In this embodiment, the IP address types supported by the Naptr type RR include: IPV4 single stack, IPV6 single stack, IPV4 and IPV6 dual stack, then the information of the IP address type supported by each Naptr type RR is one of the following : This RR supports IPV4 single stack, this RR supports IPV6 single stack, and this RR supports IPV4 and IPV6 dual stack.

[0052] Step S204: The MME determines the RR of the Naptr type for iterative query according to the information of the IP address type supported...

Embodiment 3

[0066] refer to image 3 , shows an interaction flowchart of a DNS query method according to Embodiment 3 of the present invention.

[0067] In this embodiment, when a user attaches, the MME simultaneously initiates the selection of the S-GW and the P-GW, that is, performs the co-configuration query of the S-GW and the P-GW as an example, to illustrate the DNS query solution of the present invention. However, those skilled in the art should understand that other query situations, such as non-combined query situations, can be performed with reference to the above-mentioned related embodiments of this embodiment. In addition, it should be noted that in this embodiment, the sequence is set for the S-GW device query and the P-GW device query, but in actual operation, it is not limited to the sequence in this embodiment, that is, the S-GW device query The relevant operations of the GW device query and the P-GW device query may be executed in no particular order, or may be executed...

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Abstract

The invention provides a DNS (domain name server) inquiring method and an MME (mobility management entity). The DNS inquiring method includes that the MME receives RRs (resource records) of Naptr (name authority pointer) types fed back by an s-Naptry (straightforward-name authority pointer) query launched by the DNS responding to the MME, and the RR of each Naptr type carries information of IP (internet protocol) address types which the RR supports; the RRs of the Naptr types performing iteration query is determined according to the information of the IP address type supported by each RR; the determined RRs of the Naptr types are subjected to SRV (service locator) iteration query, and the RRs of the SRV types fed back by the SRV iteration query are received; IP addresses of network elements matched with the IP address types are acquired according to the information of the IP address type supported by the RR of each SRV type, and the network elements are selected according to the acquired IP address. By the DNS inquiring method and the MME, failure of user access caused by the fact that two facilities support different IP version types is avoided.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a DNS (Domains Name Server, Domain Name Server) query method and MME (Mobility Management Entity, Mobility Management Entity). Background technique [0002] With the continuous promotion and use of IPV6, for a long period of time, IPV4 equipment and IPV6 equipment coexist in the existing network. In this way, in the same network, there will be a situation where both an IPV4 address and an IPV6 address exist at the same time. However, if communication is to be realized between two devices, the IP address types supported by them must be consistent. [0003] More commonly, in the process of UE (User Equipment, user equipment) attachment, handover or TAU (Tracking Area update, tracking area update), it is often accompanied by S-GW (Serving Gateway, serving gateway), P-GW ( Selection of PDN (Packet Data Network, Packet Data Network) Gateway, MME (Mobility Management...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/12H04W8/26
Inventor 李成浩由县卫
Owner DATANG MOBILE COMM EQUIP CO LTD
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