US6353607B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
IP base GSM inter-MSC handover
Assignee: Ericsson Inc
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Filing: 1998-11-20
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Granted: 2002-03-05
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Expires: 2018-11-20
Abstract
Abstract A wireless communications system and methods having at least two interconnected mobile switching centers ( 12, 14 ), each coupled to a corresponding media gateway ( 74, 76 ) and to an IP network ( 40 ) reduces the use of circuit connections ( 32 ) during inter-MSCs handover. Speech packets ( 84 ) are transmitted between a first MSC ( 12 ) and a second MSC ( 14 ) over an IP network ( 40 ) rather than over the circuit connections ( 32 ). An IP address ( 80 ) is used as a transaction identifier which can include the IP address, socket, and/or session number associated with the media gateway 74 for a call. The anchor MSC ( 12 ) sends the IP network address ( 80 ) that is currently being used for the call to the non-anchor MSC ( 14 ).
Inventors
- 👤 Eric Valentine
- 👤 Subhankar Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:51
CPC Classifications
H; H04; H04W; H04W36/00; H04W36/12; H04L; H04L69/00; H04L69/16; H04L69/169; H04M; H04M7/00; H04M7/006
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
184 words
In a wireless communications system comprising first and second interconnected mobile switching centers, an internet protocol network, a first media gateway and a second media gateway, the first and second mobile switching centers coupled to the first and second media gateways, respectively, and wherein the first and second mobile switching centers are further coupled to the internet protocol network, a method of reducing the use of circuit connections between the mobile switching centers comprising the steps of: a) the first mobile switching center transmitting a transaction identifier to both the first media gateway and second mobile switching center; b) the second mobile switching center transmitting a control message to the second media gateway requesting a redirection of speech packets over the internet protocol network; c) the second media gateway transmitting the control message to the first media gateway requesting a redirection of speech packets having a predetermined address to said internet protocol network; and d) transmitting said speech packets over said internet protocol network using said transaction identifier thereby reducing the use of circuit connections between said first and second interconnected mobile switching centers.
Claim 2
Dependent Claim
184 words
In a wireless communications system comprising first and second interconnected mobile switching centers, an internet protocol network, a first media gateway and a second media gateway, the first and second mobile switching centers coupled to the first and second media gateways, respectively, and wherein the first and second mobile switching centers are further coupled to the internet protocol network, a method of reducing the use of circuit connections between the mobile switching centers comprising the steps of: a) the first mobile switching center transmitting a transaction identifier to both the first media gateway and second mobile switching center; b) the second mobile switching center transmitting a control message to the second media gateway requesting a redirection of speech packets over the internet protocol network; c) the second media gateway transmitting the control message to the first media gateway requesting a redirection of speech packets having a predetermined address to said internet protocol network; and d) transmitting said speech packets over said internet protocol network using said transaction identifier thereby reducing the use of circuit connections between said first and second interconnected mobile switching centers.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein said step of transmitting a transaction identifier comprises the step of transmitting an internet protocol address.
Claim 4
Dependent Claim
23 words
The method of claim 2 wherein the step of transmitting said internet protocol network address is done using a mobile applications protocol message.
Claim 5
Dependent Claim
17 words
The method of claim 1 wherein said first mobile switching center is an anchor mobile switching center.
Claim 6
Dependent Claim
17 words
The method of claim 1 wherein said second mobile switching center is a non-anchor mobile switching center.
Claim 7
Dependent Claim
30 words
The method of claim 2 wherein said step of transmitting an internet protocol address comprises the step of transmitting an internet protocol address associated with said first mobile switching center.
Claim 8
Dependent Claim
30 words
The method of claim 2 wherein said step of transmitting an internet protocol network address comprises the step of transmitting a socket identifier associated with said first mobile switching center.
Claim 9
Dependent Claim
25 words
The method of claim 2 wherein said step of transmitting an internet protocol address comprises the step of transmitting an internet protocol plus port number.
Claim 10
Dependent Claim
182 words
In a wireless communications system comprising interconnected mobile switching centers, and internet protocol network, a first media gateway and a second media gateway, with first and second mobile switching centers coupled to said first and second media gateways, respectively, and wherein said first and second mobile switching centers are further coupled to said internet protocol network, a method of reducing the use of circuit connections during intermobile switching center handover comprising the steps of: a) initiating a handover from said first mobile switching center to said second mobile switching center; c) transmitting an internet protocol address to said first mobile switching center, the internet protocol address to be used as a transaction identifier for communicating between said first and second mobile switching centers; d) transmitting a control message from said first mobile switching center to said first media gateway, the control message causing a redirection of speech packets to said internet protocol network, the control message transmitted to said second gateway over said internet protocol network; and e) transmitting said speech packets over said internet protocol network using said internet protocol address.
Claim 11
Dependent Claim
182 words
In a wireless communications system comprising interconnected mobile switching centers, and internet protocol network, a first media gateway and a second media gateway, with first and second mobile switching centers coupled to said first and second media gateways, respectively, and wherein said first and second mobile switching centers are further coupled to said internet protocol network, a method of reducing the use of circuit connections during intermobile switching center handover comprising the steps of: a) initiating a handover from said first mobile switching center to said second mobile switching center; c) transmitting an internet protocol address to said first mobile switching center, the internet protocol address to be used as a transaction identifier for communicating between said first and second mobile switching centers; d) transmitting a control message from said first mobile switching center to said first media gateway, the control message causing a redirection of speech packets to said internet protocol network, the control message transmitted to said second gateway over said internet protocol network; and e) transmitting said speech packets over said internet protocol network using said internet protocol address.
Claim 12
Dependent Claim
17 words
The method of claim 9 wherein said first mobile switching center is an anchor mobile switching center.
Claim 13
Dependent Claim
17 words
The method of claim 9 wherein said second mobile switching center is a non-anchor mobile switching center.
Claim 14
Dependent Claim
29 words
The method of claim 9 wherein said step of transmitting said internet protocol address comprises the step of transmitting a socket identifier associated with said first mobile switching center.
Claim 15
Dependent Claim
25 words
The method of claim 9 wherein said step of transmitting said internet protocol address comprises the step of transmitting an internet protocol plus port number.
Claim 16
Dependent Claim
124 words
A wireless communication system comprising; an internet protocol network; at least two interconnected mobile switching centers coupled to said internet protocol network; first and second media gateways communicably coupled to each of said mobile switching centers and said internet protocol network, said first media gateways capable of recognizing an internet protocol address, said second media gateway capable of receiving a control message requesting redirection of data to said internet protocol network; wherein data is transmittable between said interconnected mobile switching centers through said internet protocol network following the transmission of an internet protocol address transmitted to said first media gateway and the transmission of a control message to said second media gateway, thereby reducing the use of circuit connections between said mobile switching centers.
Claim 17
Dependent Claim
124 words
A wireless communication system comprising; an internet protocol network; at least two interconnected mobile switching centers coupled to said internet protocol network; first and second media gateways communicably coupled to each of said mobile switching centers and said internet protocol network, said first media gateways capable of recognizing an internet protocol address, said second media gateway capable of receiving a control message requesting redirection of data to said internet protocol network; wherein data is transmittable between said interconnected mobile switching centers through said internet protocol network following the transmission of an internet protocol address transmitted to said first media gateway and the transmission of a control message to said second media gateway, thereby reducing the use of circuit connections between said mobile switching centers.
Claim 18
Dependent Claim
16 words
The wireless communication system of claim 14 wherein said internet protocol address comprises a socket identifier.
Claim 19
Dependent Claim
18 words
The wireless communication system of claim 14 wherein said internet protocol address comprises an internet protocol port number.
Claim 20
Dependent Claim
20 words
The wireless communication system of claim 14 wherein one of said mobile switching centers comprises an anchor mobile switching center.
Claim 21
Dependent Claim
32 words
The wireless communication system of claim 14 wherein said internet protocol network is selected from the group consisting of: a local area network, a wide area network, and a metropolitan area network.
Claim 22
Dependent Claim
21 words
The wireless communications system of claim 14 wherein said first and second media gateways reside in a public land mobile network.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-03-04 | 2005-09-03 | 2006-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-03-04 | 2009-09-03 | 2010-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-03-04 | 2013-09-03 | 2014-03-05 | $7700.00 | Window Closed / Lapsed |