Source: https://patents.justia.com/patent/8842633
Timestamp: 2019-06-27 06:36:54
Document Index: 370267632

Matched Legal Cases: ['art 1', 'art 2', 'art 1', 'art 2', 'art 1', 'art 2', 'art 3', 'art 4', 'art 1', 'art 2', 'art 4', 'art 5', 'art 1', 'art 2', 'Application No. 201080019483', 'Application No. 2']

US Patent for Systems and methods for mobile stations to identify radio access technologies Patent (Patent # 8,842,633 issued September 23, 2014) - Justia Patents Search
Justia Patents Hand-off ControlUS Patent for Systems and methods for mobile stations to identify radio access technologies Patent (Patent # 8,842,633)
May 4, 2009 - BlackBerry Limited
A mobile station capable of being served via a first radio access technology (RAT) and a second RAT. The mobile station includes a component configured to receive a permission to identify a cell of the first RAT in absence of a first radio access type neighbor cell list for a serving cell of the second RAT. The mobile station also includes a component configured to identify a cell of the first RAT after receiving the permission.
In an embodiment, MS 100 may find itself being served by GERAN cell 108, but that cell does not indicate the presence of E-UTRAN cell 104 or other E-UTRAN cells in the neighborhood of GERAN cell 108. MS 100 should be able to connect to E-UTRAN access node 102 because MS 100 is in both E-UTRAN cell 104 and GERAN cell 108, and further because MS 100 is an E-UTRAN-capable device.
Another example of a rule is that permission to perform undirected or directed searching may be signaled by a GERAN cell. A release-8 or newer GERAN cell in which a MS has been previously camped, or in which the MS is currently camped, may explicitly signal that the MS is allowed to perform an undirected or directed search. This indication may include an indication which does not require release-8 or later functionality associated with the E-UTRAN interworking in the GERAN cell. For example, the GERAN BSS (such as GERAN/UTRAN access node 106) may provide a cell identity that references a GERAN cell that does not actually exist. This cell identity is known to the MS to correspond to one or more E-UTRAN frequencies. Thus, the MS knows that the MS may be within coverage of one or more E-UTRAN cells, and that the MS may perform undirected or directed searching. When used by a release-8 or newer GERAN BSS, this indication may allow the MS to distinguish between the case where there may be E-UTRAN coverage in the neighborhood, but the BSS has not been configured to transmit the information, and the case where the BSS is configured to indicate explicitly that there is no E-UTRAN coverage in the neighborhood.
performing a circuit switched (CS) fallback procedure from an evolved universal mobile telecommunications system (UMTS) terrestrial radio access network (E-UTRAN), the fallback procedure comprising a CS communication procedure on a second radio access network;
terminating the CS communication procedure; and
responsive to the CS fallback procedure and the termination of the CS communication procedure, identifying an E-UTRAN cell by searching for cells based on frequencies stored while in E-UTRAN coverage and selecting the E-UTRAN cell without first receiving an indication of the existence of any E-UTRAN cell from the second radio access network.
2. The method of claim 1, wherein the second radio access network is a global system for mobile communications (GSM) network, an enhanced data rates for GSM evolution (EDGE) network, or a universal terrestrial radio access network (UTRAN).
3. The method of claim 1, comprising receiving a neighbor cell list from the second radio access network, wherein the mobile station does not receive an E-UTRAN neighbor cell list from the second radio access network.
4. The method of claim 1, wherein the CS fallback procedure is performed specifically to use the CS communication procedure.
5. The method of claim 1, wherein identifying the E-UTRAN cell comprises searching on a frequency of a recently used E-UTRAN cell.
6. The method of claim 1, comprising receiving from the E-UTRAN before the CS fallback procedure a message indicating E-UTRAN frequencies, wherein identifying the E-UTRAN cell comprises searching for the indicated E-UTRAN frequencies.
7. The method of claim 6, wherein the message is a mobility command message or a system information message.
receiving priority information for one or more E-UTRAN frequencies, and
identifying the E-UTRAN cell based on the priority information.
9. The method of claim 1, wherein the mobile station is configured with a rule to identify an E-UTRAN cell in absence of receiving an E-UTRAN neighbor cell list from a serving cell of the second radio access network.
10. The method of claim 1, wherein service is available to the mobile station on the second radio access network when the mobile station selects the E-UTRAN cell.
11. The method of claim 1, comprising starting a timer upon termination of the CS communication, wherein the mobile station selects the E-UTRAN cell after expiration of the timer.
12. The method of claim 1, comprising being served by the E-UTRAN after selecting the E-UTRAN cell.
a connectivity component configured to communicate with an evolved universal mobile telecommunications system (UMTS) terrestrial radio access network (E-UTRAN) and with a second radio access network; and
a processor in communication with the connectivity component and configured to: perform a circuit switched (CS) fallback procedure from the E-UTRAN, the fallback procedure comprising a CS communication procedure on the second radio access network, terminate the CS communication procedure, and responsive to the CS fallback procedure and the termination of the CS communication procedure, identify an E-UTRAN cell by searching for cells based on frequencies stored while in E-UTRAN coverage and select the E-UTRAN cell without first receiving an indication of the existence of any E-UTRAN cell from the second radio access network.
14. The mobile station of claim 13, wherein the second radio access network is a global system for mobile communications (GSM) network, an enhanced data rates for GSM evolution (EDGE) network, or a universal terrestrial radio access network (UTRAN).
15. The mobile station of claim 13, wherein the connectivity component receives a neighbor cell list from the second radio access network and does not receive an E-UTRAN neighbor cell list from the second radio access network.
16. The mobile station of claim 13, wherein the CS fallback procedure is performed specifically to use the CS communication procedure.
17. The mobile station of claim 13, wherein identifying the E-UTRAN cell comprises searching on a frequency of a recently used E-UTRAN cell.
18. The mobile station of claim 13, comprising receiving from the E-UTRAN before the CS fallback procedure a message indicating E-UTRAN frequencies, wherein identifying the E-UTRAN cell comprises searching for the indicated E-UTRAN frequencies.
19. The mobile station of claim 18, wherein the message is a mobility command message or a system information message.
20. The mobile station of claim 13, wherein the processor is further configured to:
receive priority information for one or more E-UTRAN frequencies, and
identify the E-UTRAN cell based on the priority information.
21. The mobile station of claim 13, wherein the mobile station is configured with a rule to identify an E-UTRAN cell in absence of receiving an E-UTRAN neighbor cell list from a serving cell of the second radio access network.
22. The mobile station of claim 13, wherein service is available to the mobile station on the second radio access network when the mobile station selects the E-UTRAN cell.
23. The mobile station of claim 13, further comprising a timer started upon termination of the CS communication, wherein the mobile station selects the E-UTRAN cell after expiration of the timer.
24. The mobile station of claim 13, wherein the mobile station is served by the E-UTRAN after selecting the E-UTRAN cell.
means for performing a circuit switched (CS) fallback procedure from an evolved universal mobile telecommunications system (UMTS) terrestrial radio access network (E-UTRAN), the fallback procedure comprising a CS communication procedure on a second radio access network;
means for terminating the CS communication procedure; and
means, responsive to the CS fallback procedure and the termination of the CS communication procedure, for identifying an E-UTRAN cell by searching for cells based on frequencies stored while in E-UTRAN coverage and selecting the E-UTRAN cell without first receiving an indication of the existence of any E-UTRAN cell from the second radio access network.
26. A non-transitory computer-readable storage medium containing instructions that when executed by a processor of a mobile station, perform a method comprising:
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3GPP TS 36.331v8.5.0; 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA) Radio Resource Control (RRC); Protocol Specification; Release 8; Mar. 2009; 104 pgs. Part 2.
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3GPP TS 44.018v8.6.0; 3rd Generation Partnership Project; Technical Specification Group GSM/EDGE Radio Access Network; Mobile Radio Interface Layer 3 Specification; Radio Resource Control (RRC) Protocol; Release 8; Feb. 2009; 100 pgs. Part 3.
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3GPP TS 45.005v8.4.0; 3rd Generation Partnership Project; Technical Specification Group GSM/EDGE Radio Access Network; Radio Transmission and Reception; Release 8; Feb. 2009; 100 pgs. Part 1.
3GPP TS 45.005v8.4.0; 3rd Generation Partnership Project; Technical Specification Group GSM/EDGE Radio Access Network; Radio Transmission and Reception; Release 8; Feb. 2009; 84 pgs. Part 2.
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Patent number: 8842633
Patent Publication Number: 20100278142
Inventors: Johanna L. Dwyer (Kanata), David P. Hole (Slough), Takashi Suzuki (Tokyo), Venkata Ratriakar Rayavarapu (Slough), Andrew Mark Earnshaw (Kanata), Maiyuran Wijayanathan (Waterloo), Richard Burbidge (Slough), Gordon Young (Slough)
Application Number: 12/435,357
Current U.S. Class: Hand-off Control (370/331); Contiguous Regions Interconnected By A Local Area Network (370/338); Channel Assignment (370/341); Channel Reservation Scheme (370/348)
International Classification: H04W 4/00 (20090101); H04W 36/00 (20090101); H04W 48/16 (20090101); H04W 24/08 (20090101);