Mobile station migration from D-AMPS packet system to edge/GPRS packet system in an integrated wireless network
First Claim
1. 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.
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Accused Products
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.
35 Citations
20 Claims
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1. 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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. 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:
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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. - View Dependent Claims (9, 10, 11, 12, 13)
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14. 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:
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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. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification
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- Resources
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Current AssigneeTelefonaktiebolaget LM Ericsson
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Original AssigneeTelefonaktiebolaget LM Ericsson
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InventorsYared, Marlene, Lindskog, Jan, Mazur, Sara
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Primary Examiner(s)Maung, Nay
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Assistant Examiner(s)PERSINO, RAYMOND B
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Application NumberUS09/282,434Time in Patent Office1,266 DaysField of Search370/331, 370/329, 370/338, 370/401, 370/349, 370/465, 370/336, 370/337, 370/442, 455/448, 455/436, 455/445, 455/466, 455/552, 455/434US Class Current370/465CPC Class CodesH04W 36/0077 of access information of ta...
