WO2002007353A2

WO2002007353A2 - Method and transmission device for a communications system for transmitting data using a point-to-point protocol (sctp)

Info

Publication number: WO2002007353A2
Application number: PCT/DE2001/002504
Authority: WO
Inventors: Ralf Haferbeck
Original assignee: Siemens Aktiengesellschaft
Priority date: 2000-07-17
Filing date: 2001-07-06
Publication date: 2002-01-24
Also published as: DE10034687A1; WO2002007353A3

Abstract

The invention relates to a method for transmitting data between two communications system devices (MSC(B), HLR(A)) using a point-to-point protocol (SCTP). An SCTP protocol in particular is used as the transmission protocol for the point-to-point connection. According to the invention, the connection between the two communications system devices (MSC(B), HLR(A)) is established through at least one transmission device (SCTP-TP) in order to reduce the load on the stations in managing the point-to-point connections.

Description

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3 μ P rt PJ 3 3 cn cn 1 cn Φ P- 3 Φ μ 0 φ td rt μ- cn 1 μ- tr 1 1 <! 1 1

so-called "slow start" or slow start state, which can result in a corresponding delay, since the SCTP association is only passively kept ready. In the worst case, an SCTP association with a communication partner could have been broken down shortly before a new message exchange.

3. The node must explicitly know or get to know each of its communication partners in order to be able to establish a point-to-point association like an SCTP association with it. This either leads to a corresponding administration or administrative effort, i.e. the node gets to know its partner through administration or at other burdens such as higher signaling traffic or greater delay. For example, the node could use call number signaling (DNS: Domain Name System) to find out the IP address (IP: Internet Protocol) that it needs to establish the SCTP association with its new partner.

The object of the invention is to reduce the burden of

Reduce stations in the management of point-to-point connections.

This object is achieved by the method having the features of patent claim 1 or the transmission device of a communication system according to the features of patent claim 9.

Advantageous refinements are the subject of dependent claims.

The introduction of intermediate transmission facilities in point-to-point connections offers the following advantages in particular:

The number of SCTP associations to be managed by network devices or nodes can be reduced to a very high degree become. The dynamic is also reduced by the lower number of directly communicating partners.

By combining / aggregating many messages and / or data onto a relatively small number of SCTP

Associations can be guaranteed a continuous flow of messages.

As the transmission facilities or transmission points are located in the usual scenarios at the network border of the affected

Network facility, there is stability of the direct partners of the network facility concerned. As a rule, this only communicates with a clearly manageable and easily manageable number of transmission points and network devices. Such a configuration is particularly advantageous at the network edge, also for security reasons, since a firewall can be set up there and access to the network from outside computers can also be prevented for the SCTP association. An embodiment is explained below with reference to the drawing. Show it:

1 network devices in two mobile radio networks between which there are SCTP connections,

2 shows a tree structure of the connection of communication partners to a network device and

3 shows a scheme for processing messages at a transmission point.

1 shows two mobile radio systems A and B in a situation in which a mobile subscriber station MS (A) of the first mobile radio system A registers with a base station BS (B) of the second mobile radio system B. After a corresponding message from the base station BS (B), the mobile switching center MSC (B) assigned to it of the second mobile radio system B connects to the visitor location register VLR (B) of the second mobile radio system B and to the home location register HLR (A) of the calling subscriber station MS (A). Since the subscriber station belongs to the foreign first mobile radio system A, it is registered in its home register HLR (A). The mobile switching center MCS (B) only releases the establishment of a connection requested by the subscriber station MS (A) after the exchange of subscriber-specific data, for example relating to where the resulting costs are to be billed.

The communication between the mobile switching center MSC (B) and the home location register HLR (A) takes place via a point-to-point connection, here e.g. under control of the SCTP protocol (SCTP: Simple Control Transfer Protocol) as the transfer protocol. The double arrows shown in FIG. 1 relate to such SCTP associations. The association established for communication between these two devices advantageously remains or is kept in a passive state, since a later renewed need can be foreseen and the lengthy re-establishment of a corresponding association can thus be avoided.

This connection is advantageously. here, however, the SCTP association is now not established directly between the mobile switching center MSC (B) and the home location register HLR (A), but via intermediate transmission points or SCTP transfer points, which are identified in FIG. 1 with SCTP-TP.

This reduces the effort involved in setting up, managing and controlling such SCTP associations, since these functions can largely be outsourced to the transmission points. The facilities concerned, in this case the mobile switching center MSC (B) and the home location register HLR (A) only have to use one or a few ω ω MM t-> no Cn O cn o Cn

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Φ § φ J Φ μ- PJ P J cn O μ rt tr μ Φ 0 cn 0 0 rt Φ Φ μ- μ cn μ a 0 g Ω rt 0: 0 Hi P- φ φ <! φ cn 3 0 • d P Φ μ P Ω

Φ O 0 μ- tr Φ O tr μ tr K μ- Φ cn φ tP μ- PJ O cn O tr Hl μ- 0 IV a 0 cn • tr

P μ- μ Φ tr Φ Φ Φ cn μ O μ μ- P 0 H "rt 3 φ J? 0 0 φ μ- rt

<! cn 3 cn cn CΛ μ- a ι μ μ- 3 1 cn φ Ω H ¹ φ μ- cn PJ φ 0 Φ Ω 0 o rt PJ Φ ≤. o H ¹ Φ μ- 3 φ hd IV Φ rt tr IV tr rt rt rt rt rt μ- tr P μ μ- Φ Ω Φ Hl μi μ cn s: PJ 0 0 J μ- Φ £ O Φ Φ μ- Φ N> 0 rt uq rt ι μ tr PJ μ- d 0 rt Φ rt 0 0 P μ o P, 3 0 tSi tr IV o φ 0 uq H ¹ Φ φ Φ cn et 1 CΛ Φ P PJ IV 0 φ tr μ - 3 • Φ O: PJ P φ μ- P μ- P rt cn IV n μ Ω Φ 0 <ϊ- cn <μ- φ φ Φ td 0 0 cn 0 φ φ μ Ω

Φ a 3 cn 0 Hl tr rt tr φ tr> 0 0 • 0 cn £ μ- 0 μ- tr tr> 0 μ- H ¹ PJ cn Φ TJ td Φ NJ tr cn Hi <! td Φ Φ • <Φ 0 1 Ω ^ O

PJ 0 φ P: O rt 1 tr ¹ 0 PN μ _^ -, φ φ φ H φ 0 0 cn μ uq CΛ tr 3

Hl Hl S 0 t J N CJ JΛ> p, s; PJ φ td μ N μ- μ- μ- rt tr φ Ω rt IV 3 rt s: o M t P. μ- tr! Λ • 3 3 φ ι 0 P ≥! α Φ J μ tr φ O: 0 φ J tr μ- Φ μ- PJ Cd Φ n tr α cn α μ- μ- φ μ φ φ μ. 3 μ- P rt P 0

0 μ- 0 μ Φ rt μ Hl Φ Φ CΛ φ 3 rt Ω 0 μ- rt Φ Φ tr Ω μ- P μ-

Cd l- ¹ Hl Hl μ- tr rt hd CQ μ n 0 P μ- rt tr cn Ω φ N tr rt cn Φ N μ- H) 0: μ CΛ o Φ μ uq 1 rt Hl J: rt P rt tr P Φ S μ- o rt rt Φ P μ- ι μ- 0 tr μ- π 0 Hl PJ Φ £ μ-> hd Ω t 0 0 pj: rt rt μ. tr 0 a Φ cn μ- φ

Φ 3 0 μ cn m μ- ι μ α 1 tr o φ 0 0 0 cn 0 Φ Φ rt rt P a μ

P IV 0 rt hd PJ 0 0 O φ 3 μ s cn 3 μ- tP ι 0 • d μ μ μ Φ • μ- Φ cn N 0 0 μ- 1 0 a 0 0 μ φ φ tr rt 3 P cn μ - uq μ μ- rt μ- φ P

Ω -3 φ tp tp c? Hi Φ tP rt rt P cn Φ Φ 0 Φ cn a ι Φ Ω H φ μ- LJ. μ- tu tr Φ rt tr ι rt cn Φ μ • cn μ P 0 3 rt tr Φ tr Ω tr PJ P Φ φ φ o

PJ μ- N φ cn Φ Φ • d rt J φ rt μ- φ Φ φ tr rt uq P a P <i tr a cτι

Hl rt μ- rt μ tr 0 ι σ μ 5 IV td μ M μ Φ 0 0 Φ φ oo Φ ^■ μ- rt Φ 0 J rt PJ 3 0 tr 0 PJ CL- PJ CΛ J Φ rt μ- φ 0 0 0 μ μ Ω tr μ μ Φ

0 Φ tr μ 0 0 IV N 0 3 φ t O rt μ- φ μ 0 μ- υq ιQ tr tr tr NN rt μ- ιv cn μ- PJ rt cn rt X uq μ- μ 0 Hl μ- 3 J μ rt Φ cn μ- PJ s: 0 μ a cn S Φ uq cn • cn rt 0 hd o J g tp μ- uq cn • d 0 IV • (PJ μ- rt o H- P 0 - μ- • ö HI ιp 1 P rt (Λ 0 Ω φ ^ 1 Φ 0> r O: φ ω α rt uq ω

• tr 0 φ PJ φ N 3 ιP 0 IV w cn μ O 0 tr cn 0 μ- 0 0 P 3 0 cn μ- Φ 0 0 ι μ s: Φ 0 PJ μ- • d P P Φ - ~. vp rt rt 0 0 IV 0 a P Φ s: 0 Φ μ φ cn cn a μ- cn IV 0 H 0 o φ t td cn 0 Φ V • rt uq Φ φ rt Φ ιp μi 0 Φ • d φ cn φ Φ rt 0 P 0 rt rt μ- Φ 0 μ- rt Φ μ PN μ cn *

0 φ tr 0 0 Ω μ- φ IV Φ N cn μ- ι μ- φ

• s: a • d 0 μ- tq Φ 0 tr tr rt PJ y rt P Φ rt 0 0 rt o cn μ- a PJ Φ Φ 0 ιv Φ P IV Φ Φ φ μ- 0 3 * cn Φ 0 μ < i 0 cn o 0 μ- 0 μ 0 0 IV

0 PJ μ- rt ö P 0 rt φ Ω φ PJ μ μ- φ s: PJ "tr μ Ω IV IV rt

Φ p. 3 IV Φ μ- tr μ 0 Φ W ^ Ω μ μ- ö PJ φ Φ tr uq r? rt μ- rt E3 PJ PJ φ a -—. Ξ 3 cn PJ μ- O K o tr cn ι-i μ- tj μ N IV μ tr Φ o

N μ- rt P 0 cn μ- tr Φ PJ tr rt μ ^j P 3 tr ¹ rt rt α rt φ o rt lh Φ φ 0 μ P 0 φ Φ μ Ω Φ PJ o φ Φ 0 PJ p: μ ω ι μ P μ PJ Φ td μ- φ a 0 cn cn a tr cn rt ιP P 0 _* ~ _^ . μ 0 0 rt rt φ Φ tr φ N rt 0 0 cn ι • φ 0 φ μ rt μ- 0> uq P. O _^ μ cn φ 3 Φ μ rr μ- μt P- PJ P Ω P μ- μ- o tr CΛ μ- Φ Φ PJ rt rt a P PJ tr as; μ cn PJ • tr Ω 3 P Φ ON μ- s: 0 Φ P- ιp PJ s: μ Φ uq Φ PJ

PJ PJ rt cn cn PJ rt 3 tr 0 Hl μ- P pj: μ μ- 0 0 Φ oa 0 H cn rt Φ tr PJ 0 Φ 0 rt rt s rt • n Φ Φ tr s: Φ 0 μ Hi j Φ 0 μ- μ- μ φ d 0 Ω P cn CΛ μ- 1 μ cn td Φ PJ uq rt

<cn cn O Ω tr cn N a Hi tr μ uq φ φ S, - ι φ φ tr μ 0 μ- cn Φ Φ Φ Φ cn tr 0: μ- Φ O 0 tr N • g Φ> Φ 0 Φ cn PJ P- Ω 0 • d μ. P μ S • d μ- tr

0 P rt IV s: 3 μ μ μ- 0 μ φ tr 0 h-> • Φ rt o 0 ι Φ φ a Φ φ Φ 1 μ- ι 1 0 Φ 0 P μ 1 0 Φ μ φ 0 μ- μ - P Φ μ- IV HJ 0 1

1 1 1 1 1 rt 3 1 1

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P P 0 3 π o Φ μ- a cn P rt cn μ M Ω φ μ cn φ μ- μ- N Φ μ s cn rt

Φ N Φ PJ tr • since P 0 μ- μ- "> CΛ O PJ μ- <μ- tr O μ Φ cn 0 • o Φ Φ? V μ Φ μ rt 0 μi Φ φ φ φ O o P uq 3 φ 0 rt φ 0 N μ Ω 1 tr μ- P PJ -J μ- μ- 0 PJ μ gx cn omaa 0 μ μ 0 μ o μ- μ- tr Hd a μ- PP

P (Λ o V tr Φ PJ φ P tr hd Φ Φ 0 <! Tr μ- 0 cn Ω PJ 0 & 0 Φ t- ¹ •> P

3 φ O P cn CΛ μ- 0 μ- 1 μ μ uq O μ- Ω uq μ- tr rt uq N φ P 3 <

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• SS tr μ- φ rt π PJ μ μ Ω «Φ P P 0 tr μ- μ 3 μ Ω O rt H uq μ

PJ μ rt - μ Φ Hl rt tr α p a P P PJ tr N μ 0 Φ a 0

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0 0 cn φ μ- μ- tr 0 Φ rt rt Hd _^ ~. CΛ O Φ Φ

^ μ 0 P Φ μ- μ-

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1 1 cn 1 1 1 1 1 1 a P

cυ cυ M r-o cπ o cn o cn O Cn rt C Φ 0 φ H <J P rt uq N CΛ 0 Cd rt a o P Hi φ S! uq Cd et a H Ö «P a PJ tr σ

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Φ J uq PJ tr uq H CΛ O tr 0 PJ tr 0 P μ- Φ φ P tr Φ tr PJ cn o N cn tr μ- rt Φ μ

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PJ IV rt a 0 rt μ tr OP rt Φ tr rt Φ μ- 0 PJ a Ω rt IV hd 0 Φ Cd tr uq uq tr Φ μ rt Φ φ pj: μ- 3 φ 0 Φ cn Φ Φ μ- Φ rt μ-tr μ- rt 1 0 μ. P μ cn Φ tr 4 3 rt Ω μ- μ- X μ- rt 0 μ- cn <1 μ- φ μ 3 ≥! rt rt μ- IV Φ μ CΛ

Φ OO 0 tr rt H Φ μ- μ- φ o O μ- 3 tr PJ a Φ cn Ω PJ μ- rt n μ- a OX CΛ cn a rt IV 0 μ- φ 3 JJ Hi rt s φ cn 3 μ P Cd Ω rt N Ω μ- 0 Ω tr 0 0 μ Hl rt φ P φ Ω Hl φ r + cn P tr X tr φ tr rt P μ PJ hd φ μ rt μ- tr 0: cn rt 0 0 O φ μ - rt rt φ IV μ- Φ rt rt μ- μ cn Φ -> μ- uq i rt PJ rt h- ^> tr μ a 0 μ μ 0 ^■ Φ μ- J o Φ μ- cn cn μ- H μ- μ- J Ω 0 ≥!

Φ μ- Φ 0 μ CΛ J φ 3 uq a cn μ- P 0 3 uq P Ω s: rt φ Ω P 0 a μ- 0 tr 0 ⁾

X μ- P μ E 0 o P μ a PJ Φ μ- μ- Φ Ω 3 Φ tr tr Φ μ- tr rr a 0 0 Hl rt uq Ω

Φ P Φ uq 0 Hl cn Φ Φ rt H "<i P φ μ tr 0 0 φ φ μ- O 0 rt cn 0 cn uq 0 cn tr μ Φ μ φ uq hd • d 0 μ μ. Φ μ- a 0 a μ- μ- rt a Φ Ω uq tr μ 0 • d μ a μ a cn 1 o O μ- a • o 3 Φ μ- Φ rt a Φ φ Hi tr φ Φ 0 uq 0 μ-

Φ *% φ PJ tr hd μ O X 0 rr 0 a PJ μ- N 0 φ 0 μ μ a 0: φ 0 cn P P Ω

0 a ö μ- cn φ μ rt O φ φ Φ φ Ω Φ Ω P μ- P P uq μ- μ μ- o a tr IV tr CO

PJ J rt cn μ- O μ- 0 μ- 0 rt Φ μ tr Φ Φ CΛ uq Φ 0 μ a rt 0 φ rt rt

3 3 rt Φ cn rt φ rt rt • uq μ μ o μ- cn μ ^< μ- Φ a 0 μ a <j N Φ

0 μ- PJ rt a • d O μ PJ Φ μ- φ PJ μ- g φ Hl P φ φ Ω V Φ 0 Φ Φ O φ cn s: cn rt Φ μ- IV rt μ- μ P σ 3 tr 0 Ω μ- 0 hd P μ- μ- tr rt 0 uq Hl μ P μ- μ- cn OX μ φ O 0 uq P μ- μ- Φ a tr cn a 1 φ P rt rt cn Hi φ Ω X μ

• IV tr Φ X Φ φ φ φ rt P Φ rt Ω φ c? μ μ φ • 3 <! Φ φ H tr φ a

O 0 μ φ H φ μ μ cn Φ μ tr tr μ- rt μ- o μ- 0 μ- P P μ-

3 0 a 3 iv cn μ φ tr φ 0 P Φ Hi cn Cd φ PJ Ω • Ω rt μ 0 0 l-h Φ rt PJ

3 IV φ d O a μ- J φ Hl 0: μ. μ- μ tr Φ H ¹ μ 0 O rt Φ 0

0 P Hi 3 uq Φ uq rt μ- ¹ 0 PJ r? μ rt 0 rt tr rt uq a μ- μ- X φ μ μ

PMJ 3 φ P φ Φ tr P φ H 0 μ μ 0 Φ μ- Φ Ω μ- μ 3 s: uq φ μ- ύ 3 0 rt 0 3 rt rt 0 H rt Φ J μ- PJ Φ 0 tr Φ uq tr φ tr PJ μ- Φ μ-

N 0 uq 0 0 φ Φ φ cn Φ μ- rt Ω uq μ- uq Φ cn φ rt PJ rt μ M 0 μ- <cn φ a rt Ö μ- μ- μ o μ- 0 μ- tr 0 P 0 φ 0 0 a μ- a Φ φ φ o cn 0 μ- N PJ rt OP cn a X φ O rt 0 φ tr Φ 3 a 0 μ- tr O • μ- μ 0 φ φ rt a μ- O φ Ω Φ Φ Φ P 0 uq μ φ 0 φ uq Φ P rt Hd φ 0 • d 0 cn tr μ μ φ 0 cn cn Hl IV 0 cn ü Φ 0

P a X φ C s: μ rt Φ a Hi μ- 3 uq • d CΛ rt PJ O tr Φ o Φ μ. rt P a φ pj: μ 0 Φ Ω φ J O μ- J Φ 0: uq θ: 0 O μ- 3 CΛ φ 3 P Φ IV

Φ 3 tr cn rt μ tr IX μ- O a 0 P μ φ uq tr 0 Hl H ¹ 3 n cn • d Φ rt

P μ rt cn a rt P P 0 uq P φ V H3 cn 0 Hl rt Hl a 3 M a μ-

0. Φ Φ Ω φ IV Φ rt 0 Φ PJ PJ φ μ- cn rt 1 φ 0 hd μ- PJ Φ φ P μ- O t o 0 tr P PJ μ. μ PJ uq • d P Ω rt 3 0 X μ- I 3 P μ P rt Φ P μ- Hl a O Φ • 0 0 μ- PJ cn a Cd tr μ- tr J μ- N 3 uq φ rt cn

P hd O μ- cn PV cn O Φ μ- • »3 N Ω μ μ- Φ φ P Φ Ω tr μ- μ 1 a 0 a Φ φ Φ J cn μ 0 3 X tr oa Φ 0 PP tr μ- P μ- Φ rt 0 a μ- uq μ 0 rt PJ φ μ tr rt • μ tr μ _^ φ Φ Φ P

Ω μ J 0 μ- 0 3 cn Φ 0 μ- Φ μ- a φ P μ- μ- μ φ tr μ- uq φ φ φ 0 Ω Ω μ- μ- φ Ω μ- 0 o P 1 μ

1 1 cn μ 0 tr tr cn μ- tr φ a tr 1 l

1 1 1 rt 1 rt Φ

Claims

claims

1. Method for transmitting data between two communication system devices (MSC (B), HLR (A)) by means of a point-to-point protocol (SCTP), in which the two communication system devices (MSC (B), HLR (A)) a connection via at least one independent transmission device

Use (SCTP-TP).

2. The method according to claim 1, in which an SCTP protocol is used as the transmission protocol for the point-to-point connection.

3. The method of claim 1 or 2, in which between the two communication system devices (MSC (B), HLR (A)) and the at least one transmission device (SCTP-TP) associations, in particular SCTP associations, are established which exist later remain and / or be kept in a passive state.

4. The method according to claim 1, in which functions relating to the establishment, administration and / or control of connections, in particular SCTP associations, are outsourced to the transmission device (SCTP-TP).

5. The method according to claim 1, wherein at least one transmission device (SCTP-TP) is tree-like from the perspective of at least one of the communication system devices (MSC (B), HLR (A)).

6. The method as claimed in claim 1, in which the at least one transmission device (SCTP-TP) has a decision device which, when receiving a message and / or data ("data chunks" *), can decide whether it is complete and / or is or are partly intended for the transmission facility (SCTP-TP).

7. The method according to claim 6, wherein the message and / or the data are passed on in whole or in part to a further transmission device (SCTP-TP) or the target communication system device (HLR (A)).

8. The method according to claim 1, wherein the at least one transmission device (SCTP-TP) receives a message and / or data from a communication system.

Device (MSC (B)) with a message and / or data from another communication system device with the same target communication system device (HLR (A)) and / or the same next transmission device (SCTP-TP) mixes before transmission ,

9. Transmission device (SCTP-TP) for a communication system (A, B), in particular for carrying out a method according to one of the preceding claims, the two communication system devices communicating with one another by means of a point-to-point protocol (SCTP) ( MSC (B), HLR (A)) is interposed.

10. Transmission device (SCTP-TP) according to claim 9, which is arranged in the communication system (B, A) one of the two communication system devices (MSC (B), HLR (A)) or an independent device in between.

11. Transmission device according to claim 9 or 10, which from the perspective of at least one of the communication system

Facilities (MSC (B), HLR (A)) is an element of a tree-like structure.