Patent US6452940B1 successfully refreshed from Google Patents.
US6452940B1
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Mobile station migration from D-AMPS packet system to edge/GPRS packet system in an integrated wireless network
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1999-03-31
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Granted: 2002-09-17
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Expires: 2019-03-31
Abstract
Abstract The present invention describes a method of migrating a mobile station, operating within an integrated D-AMPS/EDGE wireless telecommunication network, from the D-AMPS packet portion of the network to the EDGE/GPRS packet portion of the network. The technique includes accessing the control channels of both the D-AMPS and EDGE networks in order to obtain the necessary timing advance and packet transfer identifier for use with the GPRS packet system. In an embodiment of the invention, the MS makes a first access on a D-AMPS control channel to obtain a pointer to a reserved radio block on an EDGE packet control channel. The MS makes a second access on the EDGE control channel as specified by the reserved radio block which contains a particular frequency and timeslot location. The MS then sends a series of shortened bursts to the network such that a Timing Advance Index (TAI) value is calculated from the bursts and sent back to the MS. A packet data channel (PDCH) is assigned by the network and sent to the MS to perform the packet data transfer using the estimated TAI and assigned TFI.
Inventors
- 👤 Marlene Yared
- 👤 Sara Mazur
- 👤 Jan Lindskog
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:07
CPC Classifications
H; H04; H04W; H04W36/00; H04W36/0005; H04W36/0055; H04W36/0077
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
144 words
In a wireless telecommunication network providing packet switched data services, wherein said network comprises a first packet system operating on a first carrier bandwidth and a second packet system operating on a second carrier bandwidth, a method of migrating a mobile station (MS) between said packet systems comprising the steps of: accessing a control channel by the MS on said first carrier bandwidth associated with the first packet system; reading information directing the MS to a reserved radio block on a control channel on said second carrier bandwidth associated with the second packet system; acquiring a packet identifier associated with a packet transfer for use on the second packet system; and accessing said reserved radio block on the second carrier bandwidth by the MS such that a series of access bursts are performed to acquire timing information for use on the second packet system.
Claim 2
Dependent Claim
144 words
In a wireless telecommunication network providing packet switched data services, wherein said network comprises a first packet system operating on a first carrier bandwidth and a second packet system operating on a second carrier bandwidth, a method of migrating a mobile station (MS) between said packet systems comprising the steps of: accessing a control channel by the MS on said first carrier bandwidth associated with the first packet system; reading information directing the MS to a reserved radio block on a control channel on said second carrier bandwidth associated with the second packet system; acquiring a packet identifier associated with a packet transfer for use on the second packet system; and accessing said reserved radio block on the second carrier bandwidth by the MS such that a series of access bursts are performed to acquire timing information for use on the second packet system.
Claim 3
Dependent Claim
34 words
A method according to claim 1 wherein the first packet system operates on the first carrier bandwidth of 30 kHz and the second packet system operates on the second carrier bandwidth of 200 kHz.
Claim 4
Dependent Claim
22 words
A method according to claim 1 wherein said acquired radio block specifies a particular frequency and timeslot on said second carrier bandwidth.
Claim 5
Dependent Claim
15 words
A method according to claim 1 wherein said performed access bursts are shortened access bursts.
Claim 6
Dependent Claim
24 words
A method according to claim 1 wherein said acquired packet identifier is a Temporary Flow Identity (TFI) sent from the network to the MS.
Claim 7
Dependent Claim
27 words
A method according to claim 1 wherein said information associated with a packet transfer is a Timing Advance Index (TAI) sent from the network to the MS.
Claim 8
Dependent Claim
26 words
A method according to claim 1 wherein a packet data traffic channel is further acquired for the transfer of packet data on the second packet system.
Claim 9
Independent Claim
145 words
A method of migrating a multi-mode mobile station (MS) camping on a packet system operating on a 30 kHz carrier bandwidth to a packet system operating on a 200 kHz carrier bandwidth, said method comprising the steps of: accessing a 30 kHz carrier bandwidth control channel to acquire information pointing to a radio block reserved on a 200 kHz carrier bandwidth control channel; performing a series of access bursts on said 200 kHz carrier bandwidth control channel as directed by said reserved radio block; estimating a Timing Advance Index (TAI) from said access bursts for use with an associated packet transfer on said 200 kHz packet system; assigning a Temporary Flow Identity (TFI) that uniquely identifies a packet transfer on said 200 kHz packet system; and assigning a packet channel on said 200 kHz packet system for use by the MS for said packet transfer.
Claim 10
Independent Claim
145 words
A method of migrating a multi-mode mobile station (MS) camping on a packet system operating on a 30 kHz carrier bandwidth to a packet system operating on a 200 kHz carrier bandwidth, said method comprising the steps of: accessing a 30 kHz carrier bandwidth control channel to acquire information pointing to a radio block reserved on a 200 kHz carrier bandwidth control channel; performing a series of access bursts on said 200 kHz carrier bandwidth control channel as directed by said reserved radio block; estimating a Timing Advance Index (TAI) from said access bursts for use with an associated packet transfer on said 200 kHz packet system; assigning a Temporary Flow Identity (TFI) that uniquely identifies a packet transfer on said 200 kHz packet system; and assigning a packet channel on said 200 kHz packet system for use by the MS for said packet transfer.
Claim 11
Dependent Claim
23 words
A method according to claim 8 wherein said accessing of the 30 kHz carrier bandwidth control channel is a packet control channel (PCCH).
Claim 12
Dependent Claim
23 words
A method according to claim 8 wherein said bursts in said performing access burst step are at series of four shortened access bursts.
Claim 13
Dependent Claim
26 words
A method according to claim 8 wherein the estimating a Timing Advance Index step is performed in accordance with standard General Packet Radio Service (GPRS) procedures.
Claim 14
Dependent Claim
26 words
A method according to claim 8 wherein the assigning a Temporary Flow Identity step is performed in accordance with standard General Packet Radio Service (GPRS) procedures.
Claim 15
Dependent Claim
16 words
A method according to claim 8 wherein said packet channel is a packet data traffic channel.
Claim 16
Dependent Claim
180 words
In a integrated wireless telecommunication network comprising a D-AMPS packet system operating on a first carrier bandwidth and an EDGE/GPRS packet system operating on a second carrier bandwidth, a method of performing a packet transfer having a specified transaction size between the network and a mobile station (MS) comprising the steps of: determining an appropriate packet system for which to carry out the packet transfer; accessing a control channel associated with said D-AMPS system on the first carrier bandwidth by said MS and obtaining a radio block reserved on a EDGE/GPRS control channel on the second carrier bandwidth when the appropriate packet system is determined to be the EDGE/GPRS packet system, else packet transfer is performed on the D-AMPS packet system; performing a series of accesses bursts on the EDGE/GPRS control channel if directed by said reserved radio block; estimating a Timing Advance Index (TAI) based on said bursts by said EDGE/GPRS system; assigning a Temporary Flow Identity (TFI) to uniquely identifies a specific packet transfer on said EDGE/GPRS system; and performing a packet transfer on an assigned packet channel.
Claim 17
Dependent Claim
180 words
In a integrated wireless telecommunication network comprising a D-AMPS packet system operating on a first carrier bandwidth and an EDGE/GPRS packet system operating on a second carrier bandwidth, a method of performing a packet transfer having a specified transaction size between the network and a mobile station (MS) comprising the steps of: determining an appropriate packet system for which to carry out the packet transfer; accessing a control channel associated with said D-AMPS system on the first carrier bandwidth by said MS and obtaining a radio block reserved on a EDGE/GPRS control channel on the second carrier bandwidth when the appropriate packet system is determined to be the EDGE/GPRS packet system, else packet transfer is performed on the D-AMPS packet system; performing a series of accesses bursts on the EDGE/GPRS control channel if directed by said reserved radio block; estimating a Timing Advance Index (TAI) based on said bursts by said EDGE/GPRS system; assigning a Temporary Flow Identity (TFI) to uniquely identifies a specific packet transfer on said EDGE/GPRS system; and performing a packet transfer on an assigned packet channel.
Claim 18
Dependent Claim
34 words
A method according to claim 14 wherein the D-AMPS packet system operates on the first carrier bandwidth of 30 kHz and the EDGE/GPRS packet system operates on the second carrier bandwidth of 200 kHz.
Claim 19
Dependent Claim
17 words
A method according to claim 14 wherein the determining step is based on the packet transaction size.
Claim 20
Dependent Claim
31 words
A method according to claim 14 wherein, in the determining step, the packet transfer is performed on the D-AMPS packet system when the packet transfer is characterized as a “bounded” transaction.
Claim 21
Dependent Claim
31 words
A method according to claim 14 wherein, in the determining step, the packet transfer is performed on the EDGE/GPRS packet system when the packet transfer is characterized as an “unbounded” transaction.
Claim 22
Dependent Claim
22 words
A method according to claim 14 wherein said acquired radio block specifies a particular frequency and timeslot on said second carrier bandwidth.
Claim 23
Dependent Claim
16 words
A method according to claim 14 wherein said series of bursts are four shortened access bursts.
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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) | 2005-09-16 | 2006-03-18 | 2006-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-09-16 | 2010-03-18 | 2010-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-09-16 | 2014-03-18 | 2014-09-17 | $7700.00 | Window Closed / Lapsed |