EP1257141B1
Expired / Lapsed
EP
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System and method for communication redirection between mobile telecommunication networks with different radio access technologies
Assignee: Nortel Networks Ltd
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Filing: 2001-05-10
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Granted: 2007-01-03
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Expires: 2021-05-10
Abstract
Abstract Methods and apparatus for Dynamic System Performance Adaptation (DSPA) and in particular DSPA between uncoordinated radio access networks having different RAT's is described. The present invention may provide a system and a method for operating at least a first and a second mobile telecommunications network connected through at least one common node, a mobile terminal being in radio communication with the first mobile telecommunications network. The mobile terminal scans a frequency spectrum and identifies at least a potential radio access network. The mobile terminal communicates a report of the results of the scan to the first network. The mobile terminal sends a message to the first telecommunications network with a request for specific mobile telecommunications service. The first network decides in response to the report and the request which of the radio networks detected by the scan of the mobile terminal is suitable for the requested service. The first radio network requests the common node to redirect at least a part of the communication to the second network. <IMAGE>
Inventors
- 👤 Pierre Lescuyer
- 👤 Thierry Lucidarme
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 18:21
CPC Classifications
H; H04; H04W; H04W36/00; H04W36/0005; H04W36/0083; H04W36/0085; H04W36/24; H04W36/30; H04W36/304; H04W36/0055; H04W36/0066
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
338 words
A method of operating a plurality of mobile telecommunications networks comprising mobile terminal (10), the mobile telecommunication networks including at least a first (20) and further mobile telecommunications networks (30; 40) using at least two different radio access technologies, the further mobile telecommunications networks (30; 40) not exchanging system information by means of operation and maintenance systems with the first mobile telecommunications network (20), the first network (20) comprising a first radio access network (24, 22) and a core network (70) and a common node (74) being in the core network (70), the common node being adapted for linking to any of the further mobile telecommunications networks (30; 40), a mobile terminal (10) being suitable for communications with the plurality of mobile telecommunications networks; the mobile terminal (10) being in radio communication with the first mobile telecommunications network (20), wherein radio access for the mobile terminal (10) to a further mobile telecommunications network (30; 40) is obtained by a method comprising the steps of: the mobile terminal (10) scanning a frequency spectrum and identifying a potential radio access network belonging to the further mobile telecommunication networks, the mobile terminal (10) communicating a report of the results of the scan to the first mobile telecommunication network (20), the mobile terminal (10) sending a message to the first mobile telecommunications network (20) with a request for a specific mobile telecommunications service including a required QoS, the first network (20) deciding in response to the report, the request and the required QoS which of the plurality of further mobile telecommunications networks (30; 40) detected by the scan of the mobile terminal (10) is suitable for the requested service, the first radio network (20) requesting the common node (74) to redirect at least a part of the communication for the service to the selected further mobile telecommunications network (30; 40), and the common node setting up a path between the mobile terminal (10) and the selected further mobile telecommunications network (30; 40) to be used for the communication for the requested service.
Claim 2
Dependent Claim
24 words
The method according to claim 1, wherein the selected further mobile telecommunications network (30; 40) is uncoordinated with the first mobile telecommunications network (20).
Claim 3
Independent Claim
61 words
The method according to any of the previous claims, further comprising a Radio Network Controller (22) in the first mobile telecommunications network (20) determining whether a new Radio Access Bearer is required based on the scanning report from the mobile terminal (10) and, if so, requesting a new Radio Access Bearer from the common node (74) in the core network (70).
Claim 4
Dependent Claim
47 words
The method according to claim 3 further comprising the common node (74) in the core network (70) requesting a new bearer allocation from an inter working unit (32; 42) of the selected further mobile telecommunications network (30; 40) and receiving an acknowledgement when the bearer is allocated.
Claim 5
Dependent Claim
26 words
The method according to claim 4 further comprising the common node (74) sending a confirmation to the Radio Network Controller (22) when the handover is authorized.
Claim 6
Dependent Claim
47 words
The method according to claim 5 further comprising the Radio Network Controller (22), in response to receiving the handover authorization, sending a handover command to the mobile terminal (10) and the mobile terminal (10) beginning a log-on procedure to the selected further mobile telecommunications network (30; 40).
Claim 7
Dependent Claim
22 words
The method according to claim 6 further comprising the common node (74) requesting the first mobile telecommunications network (20) to release communication.
Claim 8
Dependent Claim
28 words
The method according to claim 6 or 7 further comprising buffering packets from the mobile terminal (10) during the log-on procedure to the selected further network (30; 40).
Claim 9
Independent Claim
22 words
The method according to any one of the preceding claims wherein the common node (74) is a Serving GPRS Support Node (SGSN).
Claim 10
Independent Claim
40 words
The method according to any previous claim, further comprising the step of the first mobile telecommunications network (20) transmitting a message to the mobile terminal (10), the message including system parameters of the selected further mobile telecommunications network (30; 40).
Claim 11
Dependent Claim
16 words
The method according to claim 10, wherein the message is broadcast to the mobile terminal (10).
Claim 12
Dependent Claim
20 words
The method according to claim 10, wherein the message is transmitted depending upon the location of the mobile terminal (10).
Claim 13
Independent Claim
14 words
The method according to any previous claim, wherein the redirection is via as wireline.
Claim 14
Independent Claim
24 words
The method according to any of the previous claims, wherein the redirection and linking is via a wide area multimedia IP telecommunications network (90).
Claim 15
Independent Claim
18 words
The method according to any previous claim, wherein the first mobile telecommunications network (20) is a cellular network.
Claim 16
Independent Claim
347 words
A system having a plurality of networks comprising at least a first (20) and further mobile telecommunications networks (30; 40) using at least two different radio access technologies, the plurality of networks being for use with mobile terminals (10), the further mobile telecommunications networks (30; 40) not exchanging system information by means of operation and maintenance systems with the first mobile telecommunications network (20), the first network (20) comprising a first radio access network (24, 22) and a core network (70) and a common node being in the core network (70), the common node being adapted for linking to any of the further mobile telecommunications networks (30; 40); a mobile terminal (10) being suitable for communications with the plurality of mobile telecommunications networks; wherein the mobile terminal (10) is adapted for obtaining radio access for the mobile terminal (10) to any of the plurality of mobile telecommunications networks (20; 30; 40), the system comprising: means in the mobile terminal (10) for scanning a frequency spectrum and identifying potential radio access networks belonging to the further telecommunications networks (30; 40), means in the mobile terminal (10) for communicating a report of the results of the scan to the first mobile telecommunications network (20), means in the mobile terminal (10) for sending a message to the first telecommunications network (20) with a request for a specific mobile telecommunications service including a required QoS, means in the first mobile telecommunications network (20) for deciding in response to the report, the request and the required QoS which of the further mobile telecommunications networks (30; 40) detected by the scan of the mobile terminal (10) is suitable for the requested service, means in the first mobile telecommunications network (20) for requesting the common node (74) to redirect at least a part of the communication for the service to the selected further mobile telecommunications network (30; 40), and the common node being adapted to set up a path between the mobile terminal (10) and the selected further mobile telecommunications network (20; 30; 40) to be used for the communication for the requested service.
Claim 17
Dependent Claim
22 words
The system according to claim 16, wherein the selected further mobile telecommunications network (30; 40) is uncoordinated with the first network (20).
Claim 18
Dependent Claim
36 words
The system according to claim 16 or 17, wherein the radio access technology of the first mobile telecommunications network (20) is different from the radio access technology of the selected further mobile telecommunications network (30; 40).
Claim 19
Independent Claim
70 words
The system according to any of the claims 16 to 18, further comprising a Radio Network Controller (22) in the first mobile telecommunications network (20), the Radio Network Controller being adapted for determining whether a new Radio Access Bearer is required based on the scanning report from the mobile terminal (10) and of so, requesting the new Radio Access Bearer from the common node (74) in the core networks (70).
Claim 20
Dependent Claim
49 words
The system according to claim 19 wherein the common node (74) in the core network (70) is adapted for requesting a new bearer allocation from an inter working unit (32; 42) of the selected further mobile telecommunications network (30; 40) and receiving an acknowledgement when the bearer is allocated.
Claim 21
Dependent Claim
28 words
The system according to claim 20 wherein the common node (74) is adapted for sending a confirmation to the Radio Network Controller (22) when the handover is authorized.
Claim 22
Dependent Claim
52 words
The system according to claim 21 wherein the Radio Network Controller (22) is adapted, in response to receiving the handover authorization, for sending a handover command to the mobile terminal (10) and the mobile terminal (10) is adapted to begin a log-on procedure to the selected further mobile telecommunications network (30; 40).
Claim 23
Dependent Claim
24 words
The system according to claim 22, wherein the common node (74) is adapted for requesting the first mobile telecommunications network (20) to release communication.
Claim 24
Dependent Claim
36 words
The system according to claim 22 or 23 wherein the first mobile telecommunications network is adapted for buffering packets from the mobile terminal (10) during the log-on procedure to the selected further telecommunications network (30; 40).
Claim 25
Independent Claim
23 words
The system according to any of the claims 16 to 24, wherein the common node (74) is a Serving GPRS Support Node (SGSN).
Claim 26
Independent Claim
43 words
The system according to any of the claims 16 to 25, wherein the first mobile telecommunications network (20) is adapted for transmitting a message to the mobile terminal (10), the message including system parameters of the selected further mobile telecommunications network (30; 40).
Claim 27
Dependent Claim
16 words
The system according to claim 26, wherein the message is broadcast to the mobile terminal (10).
Claim 28
Dependent Claim
22 words
The system according to claim 26 or 27, wherein the message is transmitted depending upon the location of the mobile terminal (10).
Claim 29
Independent Claim
21 words
The system according to any of claims 16 to 28 wherein the first mobile telecommunications network (20) is a cellular network.
References Cited (Backward Citations)
No citation records indexed.
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