EP1730985A1 - Verfahren zur steuerung einer verbindungs bergabe in einem funk-kommunikationssystem - Google Patents
Verfahren zur steuerung einer verbindungs bergabe in einem funk-kommunikationssystemInfo
- Publication number
- EP1730985A1 EP1730985A1 EP05729515A EP05729515A EP1730985A1 EP 1730985 A1 EP1730985 A1 EP 1730985A1 EP 05729515 A EP05729515 A EP 05729515A EP 05729515 A EP05729515 A EP 05729515A EP 1730985 A1 EP1730985 A1 EP 1730985A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- network access
- bts2
- access device
- connection
- packet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000012546 transfer Methods 0.000 title claims abstract description 13
- 238000004891 communication Methods 0.000 title claims description 7
- 230000011664 signaling Effects 0.000 claims description 6
- 102000047724 Member 2 Solute Carrier Family 12 Human genes 0.000 claims description 5
- 108091006621 SLC12A1 Proteins 0.000 claims description 5
- 108091006620 SLC12A2 Proteins 0.000 claims description 5
- 230000007246 mechanism Effects 0.000 description 9
- 101150080339 BTS1 gene Proteins 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000013468 resource allocation Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000001934 delay Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
Definitions
- the invention relates to a method for controlling a connection transfer between two network access devices of a radio communication system, in particular between base stations of the same or different mobile radio systems.
- radio communication systems for example the second-generation European mobile radio system GSM (Global System for Mobile Communications)
- information for example voice, image information or other data
- the radio interface relates to a connection between a base station and subscriber terminals, where the subscriber terminals can be mobile stations or fixed radio stations.
- the electromagnetic waves are emitted at carrier frequencies that lie in a frequency band provided for the respective system.
- Developments based on the GSM system, known under the terms GPRS or GERAN, for the transmission of higher data rate services are rated as 2.5. Generation.
- Radio communication systems such as UMTS (Universal Mobile Telecommunication System) or other third generation systems are designed for even higher data rates compared to the second generation.
- UMTS Universal Mobile Telecommunication System
- GSM / GERAN or UTRAN both the subscriber terminal and the base station system (BSS - Base Station System) as well as, if necessary, other network components are included in the decision fertilized via a handover or handoff, whereby measurements of the subscriber terminal are evaluated in the base station system, and a decision is then made about the handover in the base station system.
- BSS Base Station System
- GERAN In the GERAN standard, which is standardized within the framework of the 3GPP (3rd Generation Partnership Project), a handover of the connection is currently only intended for circuit-switched connections. If the target base station system rejects the connection transfer, the source base station system only has the option of either selecting a different radio cell, continuing the connection in its own radio cell, or terminating the connection.
- cell reselection For the transfer of a packet-oriented connection from a source radio cell that is currently supplying to a target radio cell that is subsequently supplying, for example due to a movement of the subscriber, there is currently only the so-called cell reselection mechanism (cell reselection). by the subscriber terminal.
- the connection is terminated when leaving the source radio cell and re-established in the target radio cell.
- the radio cell reselection mechanism is controlled solely by the subscriber terminal.
- the network in order to enable control by the network, the network is able to force the subscriber terminal into what is known as network-controlled mode 2 (NC2).
- the subscriber terminal provides the network Measurements are available, on the basis of which a radio cell change is decided by the network.
- a special message for example the so-called packet cell change order (PCCO) from the GERAN standard
- PCCO packet cell change order
- the mechanisms described above disadvantageously mean a significant delay or interruption in the transmission of packet data over the connection, since the subscriber terminal must first receive information from a general broadcast channel (BCCH) in the target radio cell, before the connection can be re-established in the target radio cell.
- BCCH general broadcast channel
- NACC network-assisted cell change
- the object of the invention is to provide a method and system components which provide a secure and fast connection Enable continuation of applications. This object is achieved by the method, the network access device and the terminal with the features of the independent claims. Advantageous embodiments can be found in dependent patent claims.
- connection handover in the sense of a handover for packet-oriented connections is proposed.
- a handover in comparison to a radio cell re-selection has the advantage that the resources required to continue the connection in the target base station system can be reserved even before the handover, and rejection by the target base station system is therefore less likely.
- a first network access device to which the terminal device has currently set up a packet-oriented connection, can signal to the terminal device that a continuation of the packet-oriented connection via a second network access device is not possible, but a second selection of the second network access device is possible.
- the signaling can also be implemented exclusively for rejection, if the possibilities radio cell reselection in the target network is not given.
- the method according to the invention can be used advantageously if, for example, the target base station system and / or a further network component, for example the SGSN (Serving GPRS Support Node), do not support connection transfer for reasons of downward compatibility.
- SGSN Serving GPRS Support Node
- Another situation is, for example, the recognition of insufficient resources within the core network by the source or target SGSN, which means that so-called bi-casting at the user level would not be possible.
- the resource allocation strategy of the source SGSN can rule out, for example, bi-casting of a connection type to be transferred.
- Another situation, for example, is that the resource allocation strategy of the target SGSN or the target base station system does not allow allocation of resources prior to handover, thereby protecting the target network from extensive resource allocation strategies of the source network.
- the network access device and terminal according to the invention each have means for carrying out the method according to the invention
- a user terminal UE is located in an overlap area of two radio cells ZI, Z2, which are supplied with radio resources by a respective base station BTS1 or BTS2.
- the base stations BTS1, BTS2 are each part of a base station system BSS1 or BSS2.
- the base station controls BSCl, BSC2 are in turn connected via switching devices MSC and / or unspecified packet switching nodes SGSN to line-bound, for example the PSTN, and packet-switched networks, for example the Internet.
- the base station controls BSCl, BSC2 can be connected to the same or different switching nodes.
- a packet-oriented connection v is established to the subscriber terminal UE via a first base station BTS1, on which data packets of one or more services are transmitted in the upward UL and / or in the downward direction DL.
- the subscriber terminal UE receives information from radio channels BCCH1, BCCH2 of the base stations surrounding it, and sends measurements relating to radio transmission parameters to the first base station BTS1 currently supplying them.
- the first base station controller BSCl a decision is made on the basis of, among other things, these measurements of the subscriber terminal UE as to whether the connection V is to be transferred to an adjacent base station on account of an impending breakup of the connection.
- the first base station controller BSCl decides at a certain point in time that the connection to the second base station BTS2 or to the second base station system BSS2 is to be transferred.
- the first base station control BSCl becomes aware that a transfer of the packet-oriented connection v to the second base station system BSS2 is not possible, for example due to a lack of support for this mechanism or a lack of available resources.
- the first base station BTS1 sends a message HOrbCR (handover rejection but cell detection) to the subscriber terminal UE.
- HOrbCR handover rejection but cell detection
- the subscriber terminal UE Based on this signaling, the subscriber terminal UE knows that a connection transfer to the second base station system BSS2 will not take place, but the possibility of the connection in the source radio cell ZI being cleared down and the connection m of the target radio cell Z2 of the second base station BTS2 being reestablished is possible by means of the known radio cell re-selection mechanism. This radio cell reselection can be supported by the known mechanisms described at the beginning.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004015259A DE102004015259B3 (de) | 2004-03-29 | 2004-03-29 | Verfahren zur Steuerung einer Verbindungsübergabe in einem Funk-Kommunikationssystem |
| PCT/EP2005/051203 WO2005094116A1 (de) | 2004-03-29 | 2005-03-16 | Verfahren zur steuerung einer verbindungsübergabe in einem funk-kommunikationssystem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1730985A1 true EP1730985A1 (de) | 2006-12-13 |
Family
ID=34963364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05729515A Withdrawn EP1730985A1 (de) | 2004-03-29 | 2005-03-16 | Verfahren zur steuerung einer verbindungs bergabe in einem funk-kommunikationssystem |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1730985A1 (de) |
| DE (1) | DE102004015259B3 (de) |
| WO (1) | WO2005094116A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2771583B1 (fr) * | 1997-11-27 | 2004-09-24 | Alsthom Cge Alkatel | Procede de cooperation entre entites d'un reseau cellulaire de radiocommunications mobiles, lors de transferts de communications intercellulaires |
| FR2774843B1 (fr) * | 1998-02-06 | 2000-03-03 | Alsthom Cge Alcatel | Procede de cooperation entre entites d'un reseau cellulaire de radiocommunications mobiles, lors de transferts de communications inter-cellulaires |
| DE69941584D1 (de) * | 1999-08-31 | 2009-12-03 | Lucent Technologies Inc | System für einen Handover in einem zellularen Mobilfunknetz |
| CN1409936A (zh) * | 1999-12-13 | 2003-04-09 | 艾利森公司 | 用于实时分组数据网的快速小区重选 |
| WO2001074095A2 (en) * | 2000-03-28 | 2001-10-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Handover in a packet switched wireless communications network |
| WO2002065805A1 (en) * | 2001-02-13 | 2002-08-22 | Telefonaktiebolaget L M Ericsson (Publ) | Partial support of mobility between radio access networks |
| AU2002362869A1 (en) * | 2001-10-17 | 2003-04-28 | Nokia Corporation | A handover method |
-
2004
- 2004-03-29 DE DE102004015259A patent/DE102004015259B3/de not_active Expired - Fee Related
-
2005
- 2005-03-16 EP EP05729515A patent/EP1730985A1/de not_active Withdrawn
- 2005-03-16 WO PCT/EP2005/051203 patent/WO2005094116A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2005094116A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102004015259B3 (de) | 2005-11-10 |
| WO2005094116A1 (de) | 2005-10-06 |
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Free format text: ORIGINAL CODE: 0009012 |
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| 17P | Request for examination filed |
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Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR |
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| DAX | Request for extension of the european patent (deleted) | ||
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: NOKIA SIEMENS NETWORKS GMBH & CO. KG |
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| RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: NOKIA SIEMENS NETWORKS S.P.A. |
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| RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: NOKIA SIEMENS NETWORKS GMBH & CO. KG |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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| 18D | Application deemed to be withdrawn |
Effective date: 20081001 |