WO2003026227A2 - Verfahren zum aufrechterhalten und/oder zur qualitativen verbesserung eines kommunikationspfads in einem relaissytem - Google Patents
Verfahren zum aufrechterhalten und/oder zur qualitativen verbesserung eines kommunikationspfads in einem relaissytem Download PDFInfo
- Publication number
- WO2003026227A2 WO2003026227A2 PCT/DE2002/003162 DE0203162W WO03026227A2 WO 2003026227 A2 WO2003026227 A2 WO 2003026227A2 DE 0203162 W DE0203162 W DE 0203162W WO 03026227 A2 WO03026227 A2 WO 03026227A2
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- WO
- WIPO (PCT)
- Prior art keywords
- path
- substitution
- relay
- devices
- identifier
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 92
- 238000004891 communication Methods 0.000 title claims abstract description 41
- 230000005540 biological transmission Effects 0.000 claims abstract description 30
- 238000006467 substitution reaction Methods 0.000 claims description 101
- 238000005516 engineering process Methods 0.000 claims description 14
- 230000011664 signaling Effects 0.000 claims description 13
- 230000008859 change Effects 0.000 claims description 11
- 238000003745 diagnosis Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 19
- 238000010586 diagram Methods 0.000 description 6
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/22—Alternate routing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/24—Multipath
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/302—Route determination based on requested QoS
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/34—Modification of an existing route
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
Definitions
- the present invention relates to a method for maintaining and / or improving the quality of a communication path in a relay system, in particular in a radio network, wherein information can be transmitted between two devices via one or more further devices along the communication path formed thereby.
- a relay system or communication system is understood to mean a system in which devices can have the possibility of directly, ie. H. to other devices without using any other devices. Whether two devices can communicate directly with each other can depend on factors that change over time, for example because devices move or the transmission paths and / or transmission properties change.
- a relay system is understood to mean a communication system in the above sense, in which information between a device A 0 and a device A n (n> 1) about a number of devices A ⁇ to A n-1 , which as
- link the direct communication path by means of the transmission technology TT I + 1 between two devices A, and A l + 1 (0 ⁇ i ⁇ n) is called link here and as
- a terminal can also be a relay.
- relays In a relay system, devices can communicate with each other via paths. In contrast to other communication networks, for example the currently known cellular mobile radio networks such as GSM, UMTS, PDC, CDMA2000, IS95, in a relay system all relays can perform the same relay functions within the scope of their physical capabilities. Examples of relay systems in this sense are radio relay systems, the Internet, intranets and local area networks.
- the quality of the connection is subject to changes over time via a communication path, in which case there is a dependency, inter alia, on the quality of transmission of the individual links and on load situations in the relay system.
- the quality of the relay system is largely determined by the possibility of being able to select communication paths with a better quality of service (QoS). Previously known methods do this in an unsatisfactory manner for relay systems.
- the present invention is therefore based on the object of specifying a method for maintaining and / or qualitatively improving a communication path in a relay system, in which the quality of the connection can be maintained at a high level even in the case of transmission conditions which change over time.
- the above object is achieved by a method having the features of patent claim 1. After that, at least a partial path of the Communication path depending on at least one predeterminable parameter can be replaced by a substitution path or at least temporarily used simultaneously with a substitution path.
- the above object is achieved in a surprisingly simple manner by exchanging at least one partial path of the communication path for a more suitable partial path.
- Such an exchange or substitution process could take place depending on at least one predefinable parameter.
- the at least one partial path could at least temporarily be used simultaneously with a more suitable partial path - the substitution path. This at least occasionally simultaneous use could also take place depending on at least one predefinable parameter.
- a specifiable quality threshold would be conceivable as a parameter here.
- the method according to the invention specifies a method in which the quality of the connection can be maintained at a high level even with transmission conditions which change over time.
- connection defined or created between the two devices could be assigned a connection identifier.
- This identifier could be unique at least as long as there are devices for which the connection is considered to exist.
- the connection identifier could consist of an identity of the one device A 0, which is unique in the relay system at a predefinable time, and of a temporary identifier, preferably chosen by A 0 .
- This temporary identifier - after the path for A 0 no longer exists - is not reallocated by A 0 in a period that is sufficiently large for the devices in the system to regard the path as no longer existing.
- each path change of a path could be communicated to A 0 and / or the target device A n by the devices involved in the path change - relays and / or terminals.
- the path could also be assigned a path identifier which is unique at a given time and which preferably takes into account each path change.
- This device identifier could consist in a particularly simple manner of the path identifier and the position i in the path.
- connection identifier and / or the temporary identifier and / or the path identifier and / or the device identifier could be assigned by one or both of the two devices A 0 and / or A n respectively arranged at the ends of the communication path.
- a relay that can communicate directly with device A is referred to as the neighboring relay of A.
- a neighbor relay of a neighbor relay of A is called a second degree neighbor relay of A.
- a neighboring relay of a neighboring relay of the n-th degree of A is called the neighboring relay (n + 1) -th degree of A.
- each device exchanges information with its neighboring relays.
- This information could include, in particular, the identifiers of existing connections and / or paths - connection identifiers and / or path identifiers - and / or the position i in the path of predeterminable degrees of neighbors.
- the exchange of information could take place periodically in a particularly secure manner. With this information, a device A belonging to an existing path could develop or generate substitution paths.
- a device A could determine a neighboring relay D of the first degree as a candidate for substitution if the neighboring relay D is neighboring relay of the first degree of A for a predeterminable time and to the same connection and / or the same Path heard, but neither A nor A is l + 1 .
- An additional optional condition could be that a link quality between device A and neighboring relay D has or exceeds a predeterminable quality.
- each device participating in the path could send at least one of its identities or identifiers to all other devices of the path or to the next K devices in both directions - if present - of the path via the path.
- each device could send the same identity to its neighbors of the first or a predeterminable higher degree.
- the identity or identifier could be device-specific and / or subscriber-specific.
- the value K could preferably be predeterminable by the relay system.
- the value K could preferably be at least temporarily reduced by a device if a signaling load exceeds a predeterminable value.
- a relay belonging to a path in particular could transmit the path identifier P and the position i in the path to its neighboring relays of the first degree. Furthermore, information about a device in the path could be communicated in the relay system to up to lth neighbors of devices on the path, so that a device that is the mth neighbor of a device in the path (m ⁇ l) has at least one neighbor ( knows m-1) th degree of the device in the path.
- a device A that occupies position i in a loop-free path with path identifier P could then determine a neighboring relay D as a candidate for substitution if this neighbor relay D as a neighboring relay D in the path with path identifier P took the position k in the path as neighboring relay Degree is known and if the neighboring relay D is a neighboring relay of the first degree of A for a specifiable time and preferably has a link quality between the device A and the neighboring relay D has or exceeds a specifiable quality.
- Another method of identifying a candidate for substitution could be as follows: First, each device of the path communicates one of its identities and / or identifications to the other devices of the path by signaling on the path.
- the identities and / or identifiers could be subscriber-specific and / or device-specific.
- the same identity is periodically transmitted. This allows a device A, a path
- Another method of identifying a candidate for substitution could be as follows:
- devices or relays could exchange neighborhood information about their neighboring relays of the first degree with their neighboring relays of the first degree.
- the neighborhood information could include the identity and degree of the neighborhood.
- each device involved in the path could then send the neighborhood information to all other devices on the path or to the next K devices in both directions - if present - of the path via the path.
- a neighboring relay of the first degree could then be determined as a candidate for substitution if the neighboring relay is simultaneously known to a relay taking the position k in the path with the path identifier P as a neighboring relay with a degree that is ⁇ I.
- the above-mentioned values I and / or K could preferably be predeterminable by the system. If a signaling load exceeds a predeterminable value, the value I and / or K could be at least temporarily reduced. The reduction could be done by a predeterminable device.
- a test method could be carried out, from which it then emerges whether a substitution process has been carried out. is to be fed. More precisely, a link diagnosis and / or link signaling could be carried out in a particularly simple manner in order to check whether a link between two devices or relays is disturbed or interrupted or presumably is disturbed or interrupted.
- this transmission technology could typically provide link diagnostics and / or information for link diagnostics that can provide information or the conclusion may allow a link to be broken or broken, or likely to be broken or broken.
- the link diagnostics could, for example, allow statements about the transmission power, the reception power, the signal strength of the received signal and / or their change. If the relay system provides link signaling on each link in a path, this link signaling can be used to diagnose a link failure or link break. More specifically, there is a link fault if the bit error rate or frame error rate of the left signaling or a combination of both is too high.
- a link break is when the left signaling is interrupted.
- the quality and / or quality of service of the path or partial path could also be assessed. More specifically, this could be done when it is known when error-free frames are transmitted from one end of the path or subpath by evaluating the bit error rate, the frame error rate or throughput, or a combination thereof.
- the quality of service of the path or of a partial path for an application can also be assessed if certain threshold values of parameters which are regulated by control mechanisms controlled by the application are exceeded or undershot. Examples of such parameters are window sizes, values of timers or counters.
- a device A could carry out a local substitution of a partial path or enable simultaneous usability of a substitution path if, according to the information known from A, an existing partial path of the path originating from A is shortened by a new partial path running via a substitution candidate R Length can be replaced.
- a device A in a loop-free path could consider a neighboring relay R not in the path as a candidate for substitution.
- A could decide whether a substitution process should be carried out. The substitution process is only carried out if A fails to do so due to a method used to avoid overlapping substitution processes.
- a local substitution could be initiated in a particularly simple manner by asking the candidate for substitution to continue building the new subpath.
- the candidate for substitution could then address the next relay of the path to be formed on the basis of the information available to him, and this process could then continue step by step via further relays. This forwarding of the request from the substitution candidate to other suitable relays could result in a new partial path to A.
- A after a corresponding diagnosis by A, could decide to perform a global substitution or a so-called global handover.
- the substitution process is diglich not carried out if A fails to do so due to a method used to avoid overlapping substitution processes.
- a device A When a device A, begins to perform a local substitution for A, it knows at least one substitution candidate and the length of the new partial paths potentially to be formed by the at least one substitution candidate. Typically, device A also knows an assessment of the - possibly potential - link to the at least one substitution candidate, which is carried out by the respective transmission technology or on the basis of information from the respective transmission technology. A, then selects a candidate for substitution with appropriate consideration of this information, builds a link to this candidate and transmits the request to continue building the new partial path.
- a 0 When A 0 begins a global substitution for A n , A 0 establishes a connection to A n according to one of the methods specified in the relay system.
- the substitution candidate could perform a global substitution by establishing a path between A 0 and A n using a non-deterministic path building method and / or a method that takes the network state or relay system state into account, so that the substitution path is very likely to be different from the original path. If the device A n begins to make a global substitution for A 0 , it does the same.
- the substitution candidate could carry out a global substitution by establishing a path between A and A, according to a non-deterministic path building method and / or a method which takes the network state or relay system state into account, so that the substitution path is very likely to differ from the original path is.
- a signaling connection could first be set up for a local or global substitution. If this connection is established and the quality is good enough, the user connection could be switched from the old path to the changed or new path. This process is not possible if the old or original path is interrupted. In this case, the user connection is switched to the changed or new substitution path as early as possible.
- a global connection could use one or more paths - the original and the new path or the new paths - until the original or one of the new paths has exceeded a quality threshold. Then only the path with the best quality could be used. Then, d. H. after the quality threshold has been exceeded, unsuitable paths could be broken down.
- a transmission could be carried out in packets ordered by labeling.
- the useful information to be transmitted could be buffered at the respective destination, so that the predetermined maximum when switching a new, shorter path Fluctuation in the delay is not exceeded. This is a particularly secure transmission method.
- the position in a connection chain can be derived by hop numbers or by observing the data flow or the path structure.
- substitution process it makes sense to break down partial paths that are no longer required. With regard to such a reduction of paths or partial paths that are no longer required, packet comparisons could take place in order to determine the direction in which the newly discovered relay or the substitute candidate is located. Alternatively or additionally, a test package could be used to determine the direction. Further alternatively or additionally to this, the position of the substitution candidate in the path could be transmitted to device A.
- a substitution could be carried out depending on the application. For example, one or more applications using a path can be substituted for a new path or a substitution can be carried out with two or more paths that can be used simultaneously.
- the transmission technologies used can use, for example, radio transmission, wired transmission, lightwave transmission, acoustic transmission or other types of transmission.
- the expression substitution process in the previous text means both the replacement of a path or partial path with a substitution path and the at least occasional simultaneous use of an original path or partial path and a substitution path or several substitution paths. Both the local and global bale substitution or a local and a global handover by the expression substitution process.
- FIG. 1 shows a diagram of a typical structure of a communication path in a relay system
- Fig. 2 in a diagram a communication path, which consists of six devices, and
- FIG. 3 shows in a diagram a communication path with a substitution path shown in parallel.
- FIG. 1 shows a diagram of a typical communication path from devices of a relay system.
- the communication path begins with device A 0 and ends with device A n .
- TT, to TT n also identify the transmission technologies used between the respective devices, which can differ from link to link between the devices.
- FIG. 2 also shows a communication path in a diagram, the communication path extending from a device A 0 to a device A 5 .
- the transmission technologies T to TT 5 are used between the devices.
- the expression “partial path” is a communication path section between device A and device A 3.
- the “link” is the direct connection between two devices adjacent to the communication path - here A 2 and A 3 .
- Fig. 3 shows in a diagram a communication path from a device A to a device F.
- a simultaneously usable substitution path is shown, which also runs from device A to device F, the connection, however, via two further devices G and H runs.
- the original communication path therefore runs via devices A, B, C, D, E and F and the substitution path runs via devices A, B, G, H, E and F.
- the respective transmission technologies are TT and TT 'specified.
- a loop is avoided in the path construction shown in FIG. 3.
- both the original communication path and the substitution path in each case comprise a comparable direct connection between the devices A and B and E and F.
- the paths lead only between devices B and E via different devices, namely on the one hand via devices C and D and on the other hand via devices G and H.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Small-Scale Networks (AREA)
- Radio Relay Systems (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003529710A JP2005503092A (ja) | 2001-08-28 | 2002-08-28 | リレーシステムにおける通信パスを維持および/または質的に改良する方法 |
EP02769895A EP1421752A2 (de) | 2001-08-28 | 2002-08-28 | Verfahren zum aufrechterhalten und/oder zur qualitativen verbesserung eines kommunikationspfads in einem relaissytem |
US10/790,390 US20040208162A1 (en) | 2001-08-28 | 2004-03-01 | Method for maintaining and/or qualitatively improving a communication path in a relay system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10141335 | 2001-08-28 | ||
DE10141335.1 | 2001-08-28 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/790,390 Continuation US20040208162A1 (en) | 2001-08-28 | 2004-03-01 | Method for maintaining and/or qualitatively improving a communication path in a relay system |
Publications (2)
Publication Number | Publication Date |
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WO2003026227A2 true WO2003026227A2 (de) | 2003-03-27 |
WO2003026227A3 WO2003026227A3 (de) | 2003-06-26 |
Family
ID=7696358
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/003162 WO2003026227A2 (de) | 2001-08-28 | 2002-08-28 | Verfahren zum aufrechterhalten und/oder zur qualitativen verbesserung eines kommunikationspfads in einem relaissytem |
Country Status (5)
Country | Link |
---|---|
US (1) | US20040208162A1 (de) |
EP (1) | EP1421752A2 (de) |
JP (1) | JP2005503092A (de) |
CN (1) | CN1579073A (de) |
WO (1) | WO2003026227A2 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1751934B1 (de) * | 2004-06-04 | 2017-12-27 | Intellectual Ventures I LLC | Adaptives routen |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10304347A1 (de) * | 2003-02-03 | 2004-08-19 | Marconi Communications Gmbh | Kommunikationsnetz und Verfahren zur Datenübertragung in einem Kommunikationsnetz |
US20060203805A1 (en) * | 2005-03-08 | 2006-09-14 | Avaya Technology Corp. | Quality-of-service assurance for IP telephony |
CN101277477B (zh) * | 2008-04-29 | 2012-04-04 | 华为技术有限公司 | 一种均衡流量的方法、装置及*** |
JP6119407B2 (ja) * | 2013-05-02 | 2017-04-26 | 富士通株式会社 | 情報処理装置、情報処理方法、及び情報処理プログラム |
JP6950633B2 (ja) * | 2018-07-02 | 2021-10-13 | 日本電信電話株式会社 | 伝送システムの管理装置および伝送システムの設計方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6721269B2 (en) * | 1999-05-25 | 2004-04-13 | Lucent Technologies, Inc. | Apparatus and method for internet protocol flow ring protection switching |
US6901053B1 (en) * | 1999-12-29 | 2005-05-31 | Nortel Networks Limited | Connectionless network express route |
US20020176363A1 (en) * | 2001-05-08 | 2002-11-28 | Sanja Durinovic-Johri | Method for load balancing in routers of a network using overflow paths |
US20020176359A1 (en) * | 2001-05-08 | 2002-11-28 | Sanja Durinovic-Johri | Apparatus for load balancing in routers of a network using overflow paths |
-
2002
- 2002-08-28 JP JP2003529710A patent/JP2005503092A/ja active Pending
- 2002-08-28 WO PCT/DE2002/003162 patent/WO2003026227A2/de not_active Application Discontinuation
- 2002-08-28 CN CN02821445.5A patent/CN1579073A/zh active Pending
- 2002-08-28 EP EP02769895A patent/EP1421752A2/de not_active Withdrawn
-
2004
- 2004-03-01 US US10/790,390 patent/US20040208162A1/en not_active Abandoned
Non-Patent Citations (2)
Title |
---|
JUBIN J ET AL: "MULTICLASS ROUTING" PROCEEDINGS OF THE MILITARY COMMUNICATIONS CONFERENCE. (MILCOM). MONTEREY, SEPT. 30 - OCT. 3, 1990, NEW YORK, IEEE, US, Bd. 2, 30. September 1990 (1990-09-30), Seiten 622-626, XP010002846 * |
YING-KWEI HO ET AL: "On-demand QoS-based routing protocol for ad hoc mobile wireless networks" PROCEEDINGS ISCC 2000. FIFTH IEEE SYMPOSIUM ON COMPUTERS AND COMMUNICATIONS, PROCEEDINGS OF 5TH IEEE SYMPOSIUM ON COMPUTER AND COMMUNICATIONS (ISCC 2000), ANTIBES-JUAN LES PINS, FRANCE, 3-6 JULY 2000, Seiten 560-565, XP010505403 2000, Los Alamitos, CA, USA, IEEE Comput. Soc, USA ISBN: 0-7695-0722-0 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1751934B1 (de) * | 2004-06-04 | 2017-12-27 | Intellectual Ventures I LLC | Adaptives routen |
Also Published As
Publication number | Publication date |
---|---|
WO2003026227A3 (de) | 2003-06-26 |
JP2005503092A (ja) | 2005-01-27 |
CN1579073A (zh) | 2005-02-09 |
US20040208162A1 (en) | 2004-10-21 |
EP1421752A2 (de) | 2004-05-26 |
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