US20040224684A1 - Method for a radiotelephone to search for higher priority networks - Google Patents

Method for a radiotelephone to search for higher priority networks Download PDF

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Publication number
US20040224684A1
US20040224684A1 US10431617 US43161703A US2004224684A1 US 20040224684 A1 US20040224684 A1 US 20040224684A1 US 10431617 US10431617 US 10431617 US 43161703 A US43161703 A US 43161703A US 2004224684 A1 US2004224684 A1 US 2004224684A1
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Prior art keywords
radiotelephone
priority
mobile
higher
plmn
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Abandoned
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US10431617
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Donald Dorsey
Sharada Raghuram
Charles Binzel
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Motorola Solutions Inc
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Motorola Solutions Inc
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATIONS NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/16Discovering, processing access restriction or access information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATIONS NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/18Selecting a network or a communication service
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATIONS NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATIONS NETWORKS
    • H04W28/00Network traffic or resource management
    • H04W28/16Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18Negotiating wireless communication parameters
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATIONS NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04Large scale networks; Deep hierarchical networks
    • H04W84/042Public Land Mobile systems, e.g. cellular systems

Abstract

A method for a radiotelephone to search for a high priority, home, or home-equivalent public land mobile network (PLMN) includes a first step of camping the radiotelephone on a cell of visited PLMN. A next step includes uniquely identifying the cell. A next step includes searching for PLMNs with a higher priority than the visited PLMN. A next step includes storing a history of those frequencies found that are not of a higher priority PLMN for the uniquely identified cell. Any subsequent searches for frequencies of higher priority PLMNs performed while camped on that cell includes scanning for available frequencies except for those frequencies listed in the history for the uniquely identified cell in which the radiotelephone is camped.

Description

    FIELD OF THE INVENTION
  • [0001]
    The present invention relates in general to radiotelephone communication systems, and more particularly to a method for a radiotelephone to scan for alternate radiotelephone access communication systems.
  • BACKGROUND OF THE INVENTION
  • [0002]
    As various different types of communication systems have arisen for radiotelephones, it has become beneficial to provide portable and mobile radiotelephone stations that are interoperable between these various communication systems. As a first step, dual-mode phones have been developed that can operate between two radiotelephone systems. For example, the Global System for Mobile (GSM) communication system and the Wideband Code Division Multiple Access (WCDMA) communication system are intended to work together in the same mobile terminal equipment operated under a Universal Mobile Telecommunications System (UMTS) environment, wherein a mobile radiotelephone is required to scan for these two alternate radio access technologies (RAT) and all possible operating frequencies for each. In particular, a UMTS radiotelephone is required to scan for these radio access technologies and frequencies when looking for its home Public Land Mobile Network (PLMN), to determine the availability of its home PLMN (HPLMN). In particular, the 3GPP specifications allow for a mobile station to perform (background) scans for PLMNs other than the one on which it has currently obtained service.
  • [0003]
    Currently, GSM and UMTS cellular radiotelephones are required to perform a periodic search for their home PLMN and higher priority PLMNs whenever the radiotelephone is camped on a Visited PLMN (VPLMN) and in its home country. When outside their home country, the mobile stations are required to perform a search for higher priority PLMNs, but not their home PLMN. This search is required to be performed periodically at a rate which is specified on the Subscriber Identity Module (SIM) or Universal SIM card and is a multiple of six minutes (with the fastest rate being once every six minutes). This search consumes battery power to perform because the radiotelephone must measure power on all frequencies of all bands which it supports and then sync to each frequency on which there is appreciable energy and read the PLMN identification of the cell. Note that for UMTS radiotelephones which support both GSM and WCDMA Radio Access Technologies (RATs), the radiotelephone is currently required by 3GPP specifications to perform the search in both RATs (i.e. the phone must perform the search for the HPLMN in all radio access technologies of which it is capable). This is true even if the HPLMN network has cells of only one RAT. Therefore, the requirement to search for all possible RATs and all possible frequencies wastes significant battery power and is unnecessary.
  • [0004]
    Further, when camped on a particular Visited PLMN (VPLMN) cell and searching for the HPLMN or higher priority PLMNs, mobile stations can now see energy on (and synchronize to and read the PLMN identification of) the same frequencies over and over again, each time the mobile unit does another search. This occurs even though these frequencies were already found in previous searches to not be the home PLMN or higher priority PLMNs.
  • [0005]
    Therefore, the need exists for a method to allow a mobile unit to search for the home PLMN and higher priority PLMNs in only those radio access technologies and frequencies that have not already been discounted (i.e. determined to be not of the HPLMN or higher priority PLMNs) during previous scans performed in the same geographic area. It would also be of benefit to provide this performance improvement with little or no additional cost.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0006]
    The features of the present invention, which are believed to be novel, are set forth with particularity in the appended claims. The invention, together with further objects and advantages thereof, may best be understood by making reference to the following description, taken in conjunction with the accompanying drawings, in the several figures of which like reference numerals identify identical elements, and wherein:
  • [0007]
    [0007]FIG. 1 illustrates a simplified block diagram of a mobile unit and a network, in accordance with the present invention
  • [0008]
    [0008]FIG. 2 illustrates the interaction between a mobile unit and a network, in accordance with the present invention; and
  • [0009]
    [0009]FIG. 3 illustrates a flow chart of method of operation of a mobile unit, in accordance with the present invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • [0010]
    The present invention provides a method to allow a mobile unit to search for the home PLMN and higher priority PLMNs in only those radio access technologies and frequencies of higher priority networks that have not already been discounted (i.e. determined to be not of the HPLMN or higher priority PLMNs) during previous scans performed in the same geographic area. This saves time and battery power in the mobile unit. Additionally, the present invention can be implemented in a communication system with a relatively simple software modification and no additional hardware, therefore limiting any cost penalty.
  • [0011]
    Allowing for higher priority network scanning in accordance with the present invention provides several advantages. These advantages include, but are not limited to, the following examples. The mobile unit can scan for available higher priority service within another technology. Scanning can reduce roaming charges when a home or higher priority network is available. The mobile unit can reduce the number of required scans to obtain service on its home or higher priority network, thereby saving battery drain. In addition, the home or higher priority networks can provide more efficient services that can be used beneficially by the mobile unit.
  • [0012]
    [0012]FIGS. 1 and 2 show mobile radiotelephone operation, in accordance with the present invention. In general, communication networks have a plurality of cells for providing radiotelephone service to a radiotelephone within a corresponding geographic area. Different networks may have overlapping cell coverage within a geographic area. Each cell of a network provides a radio communication coverage area established by fixed site base stations. Each base station is operable to send and receive messages with mobile radiotelephones. As the radiotelephones are mobile, they are required to search for home radio access technology communication networks as they roam between cells and/or communication systems. Communication systems, such as GSM, operate on frequency bands with radio channels identified by Absolute Radio Frequency Channel Number (ARFCN). For example, in the GSM 900 MHz band ARFCN 1 to 124 are used. Correspondingly, the GSM 1800 MHz band uses ARFCN 512 to 885, and GSM 1900 MHz band uses ARFCN 512 to 810. To avoid frequency conflicts, different PLMN operators do not broadcast on the same frequencies in the same geographic areas.
  • [0013]
    In practice, when the mobile station (MS) 10 is switched on, it attempts to make contact with a Public Land Mobile Network (PLMN), and in particular the last registered PLMN upon which service was provided. The MS chooses a local cell (Cell #1) base station (BS) 12 of the PLMN, and the MS 10 and BS 12 initialize and register communication between themselves whereupon the mobile is camped on the base station's network (e.g. GSM or WCDMA). The MS 10 synchronizes to a control channel 13 of the BS 12 and reads the PLMN ID, ARFCN, an identifier for the cell (CELL ID), and the Base transceiver Station Identity Code (BSIC). Any or all of this information is used to uniquely identify the particular cell that the MS is camped on. The radiotelephone would save this information in storage 11, which can be a Subscriber Identity Module (SIM), Universal SIM (USIM), or a memory, such as a non-volatile memory, for example.
  • [0014]
    Typically, a MS will be operable on its home PLMN. However, in those cases where the MS is roaming in its home country, it will camp and register on a Visited PLMN (VPLMN) and base station. The VPLMN can consist of one or more different radio access technologies, such as GSM and WCDMA, for example. A list of preferred PLMNs (possibly including the VPLMN) is prestored on a Subscriber Identity Module (SIM) card. These listed PLMNs are assigned priorities by the home network provider of the MS. The highest priority network for the mobile unit is it's home Public Land Mobile Network (HPLMN) (or home-equivalent PLMN). However, since the MS is roaming, it may find itself camped on a lower priority VPLMN. Therefore, several other higher priority networks can be available to the MS. The presence of these higher priority networks must be determined through scanning.
  • [0015]
    When camped on a VPLMN, the mobile station is required under the 3GPP standard to do a search periodically to find access to higher priority networks, and preferably its home PLMN. Specifically, the 3GPP 23.122 specification, version 5.2.0 (2002-12) in section 4.4.3.3 states, “If the MS is in a VPLMN, the MS shall periodically attempt to obtain service on its HPLMN or higher priority PLMN . . . ” The present invention is effective in those cases where the VPLMN is not the HPLMN of the mobile unit, inasmuch as the HPLMN is typically of the highest priority and no search would be required if the mobile unit was camped thereon.
  • [0016]
    Therefore, referring to FIG. 1 and 2, the MS 10 will search for the home and higher priority PLMNs than the VPLMN upon which the radiotelephone is presently camped. For example, the radiotelephone could monitor the frequencies 15, 17, 19 of any co-located or nearby cells 14,16,18 having sufficient signal strength. The radiotelephone can then determine whether any of these cells are of a higher priority PLMN than the camped cell #1.
  • [0017]
    A novel aspect of the present invention is then having the radiotelephone store a history of those frequencies found, while camped on a particular cell, that are not of a home or higher priority public land mobile network. Similarly, if a history already exists for the particular camped cell, then the radiotelephone adds any newly found frequencies that are not of a higher priority PLMN to any previously found frequencies in the history. The radiotelephone would save the history in storage 11, which can be a SIM, USIM, or a memory, such as a non-volatile memory, for example. The history would be associated with the uniquely identified cell, such that the radiotelephone would no longer need to search for a particular frequency 15, 17, 19 within that uniquely identified cell since it had previously determined that this frequency is only used by an undesired PLMN. Preferably, the radiotelephone stores an individual history of those frequencies found that are not of a home or higher priority public land mobile network for each of a plurality of cells of the VPLMN.
  • [0018]
    Thereafter, the radiotelephone would scan for frequencies of the home or higher priority public land mobile networks except for those frequencies 15, 17, 19 listed in the history for the uniquely identified cell in which the radiotelephone is camped. This would save considerable searching time and the associated battery drain.
  • [0019]
    For example, while camped on a cell (#1) of a VPLMN network, the MS performs a search for the home and higher priority PLMNs. The MS saves a record which includes the following information: information (e.g. Cell ID 123456789, ARFCN, BSIC, etc.) to uniquely identify the serving cell at the time of the PLMN search, and the ARFCNs of the frequencies 15, 17, 19 which turned out to be PLMNs which were not the home or higher priority PLMNs (e.g. ARFCN 20, 30 and 40). In the example of FIG. 1, PLMN I.D.s 111/22, 111/33 and 111/44 are all PLMNs which are not the home or higher priority PLMNs. At this point the radiotelephone can proceed with normal communication. However, when the radiotelephone roams and is again camped on the same cell of the VPLMN network (as the MS was on previously when it created the stored history of information), the MS must perform another search for frequencies of the home and higher priority PLMNs. In this case, the MS now uses the saved history to avoid synchronizing to and reading the PLMN I.D. (i.e. skip searching) on frequencies 15, 17, 19 which have already been found to be not the home or higher priority PLMNs. For example, Cell ID 123456789 has a history of undesired frequencies ARFCN 20, 30 and 40. Therefore, in this PLMN search, the MS will not attempt to synchronize to or read the PLMN I.D. on cell #2, #3, or #4 (i.e. PLMN I.D.s 111/22, 111/33 and 111/44), thereby saving time and power.
  • [0020]
    It may be the case that after a radiotelephone has stored a history of frequencies for non-higher priority PLMNs in a particular cell, then the configuration of cells is physically changed so that the same ARFCN which was not a higher priority PLMN before becomes a higher priority PLMN. In this case, the history stored in the radiotelephone is incorrect. According to the 3GPP standard, those particular frequencies must be scanned. Therefore, the present invention provides that the radiotelephone would only save the records described above only when the radiotelephone is powered (e.g. stored in RAM) such that the history records are reset anew at each power up. In this way, if the radiotelephone ever got trapped in a mode in which it was not finding a higher priority PLMN due to change of the physical cell configuration, the user could power it off and back on again to eliminate the problem. Alternatively, the radiotelephone could have a periodic timeout period (e.g. three hours) wherein the histories are erased and the radiotelephone must rebuild them.
  • [0021]
    It may also be the case that a user could change the user-controlled PLMN list on the SIM or USIM so that a PLMN that was not a higher priority PLMN before (when a previous search was performed and stored) is now a higher priority PLMN. In this case, the present invention provides that if the user changes the user-controlled PLMN list, then all of the history records of previous PLMN searches are reset (i.e. destroyed). Alternatively, the MS can still save the PLMN identifications (IDs) of those ARFCNs that were found to not be the home or higher priority PLMNs. In this way, if the user-controlled preferred PLMN list is changed, the MS would still be able to make use of the stored information to save current drain. This technique is preferred.
  • [0022]
    It may also be the case that if the VPLMN network on which the radiotelephone is currently camped supports the Equivalent PLMN feature of the 3GPP standard, then the radiotelephone may be given a list of PLMNs which should be treated as equivalent to the VPLMN. (This list is given to the phone at the time of attach and Routing Area Update.) However, if the equivalent PLMN list which the radiotelephone was using when the original PLMN search was performed is different than the equivalent PLMN list which it is currently using (i.e. a PLMN which was not a higher priority PLMN before when the previous PLMN search was performed could be a higher priority PLMN now.), then the present invention provides for three solutions, as follows.
  • [0023]
    Firstly, the radiotelephone could not save a record of a previous PLMN search if equivalent PLMNs were in use at the time, and the radiotelephone could not use any of the stored history records of previous PLMN searches if equivalent PLMNs are in use now.
  • [0024]
    Secondly, if equivalent PLMNs were in use when a previous PLMN search was performed, then the radiotelephone could save the equivalent PLMN list that was in use at the time as part of the saved history information for that PLMN search. Afterwards, when performing future PLMN searches, the radiotelephone would only use the saved information to minimize battery consumption if the equivalent PLMN list in use now is the same as that which was in use when the original search (associated with the saved history) was performed. It should be noted that it is very likely that the equivalent lists will in fact be the same.
  • [0025]
    Thirdly, the radiotelephone could simply save the PLMN IDs associated with each of the ARFCNs which was found to be not the home or higher priority PLMNs. This way, when performing a later search, if one of the PLMN IDs now is a higher priority PLMN, then the radiotelephone would know that is must synchronize to and read the PLMN ID on that cell to re-verify it.
  • [0026]
    As a failsafe solution, the radiotelephone can always be directed to do a complete search for all available frequencies in use for the home or higher priority PLMNs, and update the history with any new frequencies found that are not of the home or higher priority PLMN. Similarly, the radiotelephone can be required to erase the history for any change in the preferred public land mobile network list.
  • [0027]
    Advantageously, the present invention provides that by skipping the search in the frequencies which are not employed by the higher priority PLMN operator, the battery drain is greatly reduced. In addition, the radiotelephone will periodically perform the higher priority PLMN search in only those frequencies which can belong to higher priority PLMNs, and can update the stored history with those new frequencies that have been found not to be employed by the higher priority PLMN operator.
  • [0028]
    The method of the present invention can be further understood with reference to FIG. 3. The method provides for a radiotelephone to search for radio access technology communication networks. Each communication network includes a plurality of cells for providing radiotelephone service to a radiotelephone within a corresponding geographic area. Each cell includes paging and voice communication and has a radio communication coverage area established by fixed site base stations, which operate to send messages to radiotelephones and receive messages therefrom.
  • [0029]
    In a first step 300, the mobile radiotelephone registers and camps on a local PLMN (typically the best available network) that has service in one or more radio access technologies in which the radiotelephone is capable. The radiotelephone also uniquely identifies 302 the cell it is camped on. It may be that the radiotelephone is camped on the highest priority PLMN (e.g. home) available to it. However, for the present invention, the radiotelephone is camped on a Visited PLMN that is not the highest priority PLMN available to it. This calls for the radiotelephone to begin searching for a higher priority PLMN, and preferably its home or home-equivalent network. While on the VPLMN, the radiotelephone begins its normal reception and response or acknowledgement to messages and communications. However, the mobile radiotelephone is now required to periodically scan for the home or higher priority PLMN.
  • [0030]
    A next step 304 includes searching for public land mobile networks with a higher priority than the visited public land mobile network that the radiotelephone is camped on.
  • [0031]
    A novel aspect of the present invention is storing 306 a history of those frequencies found that are not of the home or higher priority public land mobile network. Similarly, if a history already exists for the camped cell, then the radiotelephone adds any newly found frequencies that are not of the home or higher priority PLMN to any previously found frequencies of the history. The radiotelephone would save the history in storage, which can be a SIM, USIM, or a memory, such as a non-volatile memory, for example. The history would be associated with the uniquely identified cell from step 302, such that the radiotelephone would no longer need to scan on a particular frequency when camped on the uniquely identified cell since it had previously determined that this frequency is only used by an undesired PLMN. Preferably, the radiotelephone stores an individual history of those frequencies found that are not of the home or higher priority public land mobile network for each of a plurality of cells of the VPLMN.
  • [0032]
    Thereafter, when camped on the identified cell, the radiotelephone would begin scanning 308 for frequencies of the home or higher priority public land mobile networks except for those frequencies listed in the history for the uniquely identified cell in which the radiotelephone is camped. This would save searching time and the associated battery drain since it is no longer necessary for the mobile unit to waste power scanning for all possible radio access technologies and all possible frequencies.
  • [0033]
    In a preferred embodiment, the method includes further steps of periodically searching 310, but at a very slow rate so as not to use much battery power, for all available radio access technologies and frequencies in use for the home or higher priority public land mobile networks, and updating 312 the history with any new frequencies found that are not of the home or higher priority public land mobile network. This is desired for those cases where the PLMN changes its radio access technologies or frequencies after the radiotelephone has stored a history. This is a failsafe technique to ensure that the radiotelephone keeps up to date information in accordance with the requirements of the 3GPP standard. Alternatively, the history in the storing step can be started anew each time the radiotelephone is powered on or after a certain amount of time elapses.
  • [0034]
    The present invention provides particular advantage for service providers that are looking forward to the availability of mobile stations capable of selecting the best available network type among different radio access technology networks. These features will provide a way for operators to use these same mobile stations while minimizing the impact on their networks.
  • [0035]
    In addition, it should be recognized that the method of the present invention can also be applied to scanning for more than one radio access technology, using a multimode radiotelephone capable of camping on several different radio technology systems.
  • [0036]
    While the invention has been described in the context of a preferred embodiment, it will be apparent to those skilled in the art that the present invention may be modified in numerous ways and may assume many embodiments other than that specifically set out and described above. Accordingly, it is intended by the appended claims to cover all modifications of the invention which fall within the broad scope of the invention.

Claims (20)

    What is claimed is:
  1. 1. A method for a radiotelephone to search for higher priority public land mobile networks, each network having a plurality of cells for providing radiotelephone service to a radiotelephone within a corresponding geographic area, each cell having a radio communication coverage area established by fixed site base stations, and each base station operable to send messages to radiotelephones, the method comprising the steps of:
    camping the radiotelephone on a cell of a visited public land mobile network;
    uniquely identifying the cell;
    searching for public land mobile networks with a higher priority than the visited public land mobile network; and
    storing a history of those frequencies found during the scanning step that are not of a higher priority public land mobile network, the history being associated with the uniquely identified cell.
  2. 2. The method of claim 1, further comprising the step of scanning for higher priority public land mobile networks in frequencies other than those frequencies listed in the history for the uniquely identified cell in which the radiotelephone is camped.
  3. 3. The method of claim 1, wherein the storing step includes storing the PLMN IDs associated with each of the ARFCNs which were found to be not the home or higher priority PLMNs in the searching step.
  4. 4. The method of claim 1, wherein the storing step includes storing an individual history of those frequencies found that are not of a higher priority public land mobile network for each of a plurality of cells of the visited public land mobile network.
  5. 5. The method of claim 1, wherein the storing step includes adding any newly found frequencies that are not of a higher priority public land mobile network to any previously found frequencies of the history.
  6. 6. The method of claim 1, wherein the history in the storing step is started anew at at least one of the group of: each time the radiotelephone is powered on and after a timeout period.
  7. 7. The method of claim 1, further comprising the steps of:
    periodically searching, at a slow rate so as not to consume much battery power, for higher priority public land mobile networks in all radio access technologies and frequencies supported by the radiotelephone; and
    updating the history with any new frequencies found that are not of a higher priority public land mobile network.
  8. 8. The method of claim 1, further comprising the steps of:
    giving a list of public land mobile networks to the radiotelephone; and
    erasing the history if there is a change in a stored preferred public land mobile network list.
  9. 9. A method for a radiotelephone to search for higher priority public land mobile networks, each network having a plurality of cells for providing radiotelephone service to a radiotelephone within a corresponding geographic area, each cell having a radio communication coverage area established by fixed site base stations, and each base station operable to send messages to radiotelephones, the method comprising the steps of:
    camping the radiotelephone on a cell of a visited public land mobile network;
    giving a list of public land mobile networks to the radiotelephone;
    uniquely identifying the cell;
    searching for public land mobile networks with a higher priority than the visited public land mobile network;
    storing a history of those frequencies found that are not of a higher priority public land mobile network for each of a plurality of cells of the visited public land mobile network, the history being associated with each uniquely identified cell; and
    scanning for higher priority public land mobile networks except in those frequencies listed in the history for the uniquely identified cell in which the radiotelephone is camped.
  10. 10. The method of claim 9, wherein the storing step includes storing the PLMN IDs associated with each of the ARFCNs which were found to be not the home or higher priority PLMNs in the searching step.
  11. 11. The method of claim 9, wherein after the scanning step further comprising the step of adding any newly found frequencies that are not of a higher priority public land mobile network to any previously found frequencies of the history.
  12. 12. The method of claim 9, wherein the history in the storing step is started anew at at least one of the group of: each time the radiotelephone is powered on and after a timeout period.
  13. 13. The method of claim 9, further comprising the steps of:
    periodically searching, at a slow rate so as not to consume much battery power, for higher priority public land mobile networks in all radio access technologies and frequencies supported by the radiotelephone; and
    updating the history with any new frequencies found that are not of a higher priority public land mobile network.
  14. 14. The method of claim 9, further comprising the step of erasing the history when there is a change in a stored preferred public land mobile network list.
  15. 15. The method of claim 9, wherein the storing step includes storing the history in one or more of a non-volatile memory of the radio telephone and a subscriber identity module associated with the radiotelephone.
  16. 16. A method for a radiotelephone to search for higher priority public land mobile networks, each network having a plurality of cells for providing radiotelephone service to a radiotelephone within a corresponding geographic area, each cell having a radio communication coverage area established by fixed site base stations, and each base station operable to send messages to radiotelephones, the method comprising the steps of:
    camping the radiotelephone on a cell of a visited public land mobile network;
    giving a list of public land mobile networks to the radiotelephone;
    uniquely identifying the cell;
    searching for public land mobile networks with a higher priority than the visited public land mobile network;
    storing an individual history of those frequencies found that are not of a higher priority public land mobile network for each of a plurality of uniquely identified cells of the visited public land mobile network;
    scanning for higher priority public land mobile networks except in those frequencies listed in the history for the uniquely identified cell in which the radiotelephone is camped; and
    adding any newly found frequencies that are not of a higher priority public land mobile network to any previously found frequencies of the history.
  17. 17. The method of claim 16, wherein the history in the storing step is started anew at at least one of the group of: each time the radiotelephone is powered on and after a timeout period.
  18. 18. The method of claim 16, further comprising the steps of:
    periodically searching, at a slow rate so as not to consume much battery power, for higher priority public land mobile networks in all radio access technologies and frequencies supported by the radiotelephone; and
    updating the history with any new frequencies found that are not of a higher priority public land mobile network.
  19. 19. The method of claim 16, further comprising the step of erasing the history when there is a change in a stored preferred public land mobile network list.
  20. 20. The method of claim 16, wherein the storing step includes storing the PLMN IDs associated with each of the ARFCNs which were found to be not the home or higher priority PLMNs in the searching step.
US10431617 2003-05-07 2003-05-07 Method for a radiotelephone to search for higher priority networks Abandoned US20040224684A1 (en)

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Application Number Priority Date Filing Date Title
US10431617 US20040224684A1 (en) 2003-05-07 2003-05-07 Method for a radiotelephone to search for higher priority networks

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
US10431617 US20040224684A1 (en) 2003-05-07 2003-05-07 Method for a radiotelephone to search for higher priority networks
JP2006532498A JP4607886B2 (en) 2003-05-07 2004-04-27 The method for radio telephone for searching a higher priority network
CN 200480010009 CN100415003C (en) 2003-05-07 2004-04-27 A method for a radiotelephone to search for higher priority networks
ES04760849T ES2314424T3 (en) 2003-05-07 2004-04-27 A method for a radiotelephone networks seek higher priority.
DE200460017299 DE602004017299D1 (en) 2003-05-07 2004-04-27 A method for a radiotelephone to scan for networks with a higher priority
EP20040760849 EP1621030B1 (en) 2003-05-07 2004-04-27 A method for a radiotelephone to search for higher priority networks
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Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020193112A1 (en) * 2001-04-19 2002-12-19 Kabushiki Kaisha Toshiba Mobile communication apparatus
US20040229610A1 (en) * 2002-11-19 2004-11-18 Nec Corporation Cellular network acquisition method and apparatus
US20050059395A1 (en) * 2003-09-15 2005-03-17 Lg Electronics Inc. Rescan method and apparatus of a mobile terminal
US20050213566A1 (en) * 2004-03-29 2005-09-29 Sami Jutila System and method for network selection in a communication system using a shared RAN
US20060068782A1 (en) * 2004-09-28 2006-03-30 Nec Corporation Cell search method and mobile communication terminal
US20060099943A1 (en) * 2004-11-11 2006-05-11 Samsung Electronics Co., Ltd. Apparatus and method for receiving improved roaming service in a mobile terminal
US20060133311A1 (en) * 2004-12-17 2006-06-22 Alcatel Method of improving the management of mobility in a cellular mobile communications system
US20060282554A1 (en) * 2005-04-14 2006-12-14 Nokia Corporation Method, apparatus and computer program providing network-associated system priority list for multimode system selection
US20060291427A1 (en) * 2005-06-25 2006-12-28 Park Sun-Yong Method for identifying home cell and apparatus thereof
US20070015539A1 (en) * 2000-10-03 2007-01-18 Cingular Wireless Ii, Llc Location information erase on SIM cards
WO2007015071A3 (en) * 2005-08-01 2007-05-24 Ubiquisys Ltd Automatic base station configuration
US20070161373A1 (en) * 2003-07-29 2007-07-12 T-Mobile Deutschland Gmbh Method for joint use of a radio access network by several mobile radio providers
WO2007103991A2 (en) 2006-03-07 2007-09-13 Qualcomm Incorporated Method and apparatus for searching radio technologies
US20070270147A1 (en) * 2006-05-17 2007-11-22 Samsung Electronics Co., Ltd. Apparatus and method for scanning a home public land mobile network in a mobile communication terminal
US20070298801A1 (en) * 2006-06-21 2007-12-27 Samsung Electronics Co., Ltd. Apparatus and method for reselecting a public land mobile network in a mobile communication terminal
US20080102794A1 (en) * 2005-08-01 2008-05-01 Ubiquisys Limited Self-Configuring Cellular Basestation
US20080146223A1 (en) * 2006-12-14 2008-06-19 Motorola, Inc. Method and system for selecting a communication network
US20080153486A1 (en) * 2006-12-22 2008-06-26 Telefonaktiebolaget L M Ericsson (Publ) Efficient PLMN Search Order
US20080220778A1 (en) * 2007-03-06 2008-09-11 Telefonaktiebolaget L M Ericsson (Publ) Data Sharing among Radio Access Technologies
US20090116441A1 (en) * 2007-11-07 2009-05-07 Samsung Electronics Co. Ltd. Network connection method for mobile terminal in asynchronous mobile communication system
US20090124224A1 (en) * 2007-11-14 2009-05-14 Infineon Technologies Ag Radio communication device, receiver controller of a radio communication device, and method for searching for a radio cell
WO2009096496A1 (en) * 2008-01-30 2009-08-06 Nec Corporation Plmn selection in multi-network environment
US20100177705A1 (en) * 2004-08-31 2010-07-15 Research In Motion Limited System and method for handling simple ip to mobile ip transition
WO2010123416A1 (en) * 2009-04-20 2010-10-28 Telefonaktiebolaget L M Ericsson (Publ) A method of frequency search
US8190163B2 (en) 2002-08-08 2012-05-29 Qualcomm Incorporated Methods and apparatus of enhanced coding in multi-user communication systems
US8483760B2 (en) 2007-02-23 2013-07-09 Ubiquisys Limited Basestation for cellular communications system
US8553595B2 (en) 2003-02-19 2013-10-08 Qualcomm Incorporated Controlled superposition coding in multi-user communication systems
US8593932B2 (en) 2003-05-16 2013-11-26 Qualcomm Incorporated Efficient signal transmission methods and apparatus using a shared transmission resource
US20140010136A1 (en) * 2007-08-03 2014-01-09 Interdigital Patent Holdings, Inc. System level information for discontinuous reception, cell reselection and rach
US8744452B2 (en) 2007-02-02 2014-06-03 Ubiquisys Limited Receiving signals from surrounding basestations
US8755313B2 (en) 2007-01-11 2014-06-17 Qualcomm Incorporated Using DTX and DRX in a wireless communication system
CN104025664A (en) * 2012-12-28 2014-09-03 华为技术有限公司 Method and device for network selection from shared network
US20140256327A1 (en) * 2013-03-11 2014-09-11 Qualcomm Incorporated Method and apparatus for improved reselection during mode transitions
US9277470B2 (en) 2002-08-08 2016-03-01 Qualcomm Incorporated Method of creating and utilizing diversity in a multiple carrier communication system
US9432942B2 (en) 2007-01-11 2016-08-30 Qualcomm Incorporated Using DTX and DRX in a wireless communication system
US9525995B2 (en) * 2015-05-05 2016-12-20 Apple Inc. Mobile device with improved network selection while roaming
EP1929808B1 (en) * 2005-08-18 2016-12-21 Qualcomm Incorporated System search to detect for a wireless communication network in a crowded frequency band
US9706561B1 (en) * 2015-08-25 2017-07-11 Sprint Spectrum L.P. Method and system for managing quantity of carriers in air interface connection based on public land mobile network to which a user equipment device subscribes
US20170318611A1 (en) * 2013-08-05 2017-11-02 Sharp Kabushiki Kaisha Wireless communication system, terminal apparatus, base station apparatus, wireless communication method, and integrated circuit

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4510648B2 (en) * 2005-01-19 2010-07-28 京セラ株式会社 Communication terminal
US20060246899A1 (en) * 2005-04-28 2006-11-02 Research In Motion Limited System and method for providing network advertisement information via a network advertisement broker (NAB)
US7773990B2 (en) * 2005-05-23 2010-08-10 Telefonaktiebolaget L M Ericsson (Publ) Avoidance of service interruptions in visited public land mobile network (VPLMNs)
US8428584B2 (en) 2005-07-01 2013-04-23 Research In Motion Limited System and method for accelerating network selection by a wireless user equipment (UE) device
US7515575B1 (en) * 2005-08-26 2009-04-07 Kineto Wireless, Inc. Intelligent access point scanning with self-learning capability
JP4760490B2 (en) * 2006-03-30 2011-08-31 日本電気株式会社 Network switching method and mobile radio terminal
EP1858278B1 (en) 2006-05-19 2013-05-15 Research In Motion Limited System and method for facilitating accelerated network selection in a radio network enviroment
KR101490115B1 (en) * 2007-09-26 2015-02-05 텔레포나크티에볼라게트 엘엠 에릭슨(피유비엘) Selecting a cell Associated with a Radio Access Technology
US8270972B2 (en) * 2007-10-23 2012-09-18 Motorola Mobility Llc Method and apparatus for detecting an alternate wireless communication network
JP4460616B2 (en) * 2007-11-16 2010-05-12 株式会社エヌ・ティ・ティ・ドコモ Cell selection method and a mobile station
KR101450776B1 (en) * 2007-12-04 2014-10-14 삼성전자주식회사 Terminal and the control method that achieve camping using IMSI information
US9094933B2 (en) * 2008-01-14 2015-07-28 Qualcomm Incorporated Wireless communication paging utilizing multiple types of node identifiers
US9313769B2 (en) 2008-01-14 2016-04-12 Qualcomm Incorporated Wireless communication paging and registration utilizing multiple types of node identifiers
US8688144B1 (en) * 2008-09-09 2014-04-01 Marvell International Ltd. Method and apparatus to configure mobile communication and applications
US8175592B2 (en) * 2008-10-20 2012-05-08 Qualcomm Incorporated Wireless network search
US8565221B2 (en) * 2008-12-04 2013-10-22 Qualcomm Incorporated Domain specific PLMN selection
KR101545738B1 (en) * 2008-12-30 2015-08-20 삼성전자주식회사 Network scanning method and apparatus in a mobile communication terminal
US8825051B2 (en) * 2009-05-01 2014-09-02 Qualcomm Incorporated Idle handoff to hybrid femto cell based on system selection database
KR101661681B1 (en) * 2010-09-13 2016-09-30 삼성전자 주식회사 Method and apparatus for managing a list of equivalent plmn
US8509769B2 (en) 2011-06-30 2013-08-13 Motorola Mobility Llc Method and apparatus for scanning for a wireless communication network
US8688110B1 (en) 2012-09-13 2014-04-01 Qualcomm Incorporated Apparatus and method for limiting searches for a home PLMN according to its proximity
US8989207B2 (en) * 2012-09-27 2015-03-24 Intel Corporation System and method for resource allocation priority in multiple-persona cellular devices
US9730147B2 (en) 2013-09-11 2017-08-08 Blackberry Limited Higher priority network scanning
KR101685533B1 (en) 2014-11-21 2016-12-12 현대자동차주식회사 Telematics terminal, telematics center and control method thereof
CN104853412B (en) * 2015-04-30 2018-03-27 广东欧珀移动通信有限公司 A network access method and a mobile communication terminal
CN104902542B (en) * 2015-04-30 2018-03-27 广东欧珀移动通信有限公司 An information sharing method and a mobile communication terminal
US9344877B1 (en) 2015-07-08 2016-05-17 Qualcomm Incorporated Symmetric equivalent public land mobile network (EPLMN) configurations among subscriptions

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6374106B1 (en) *
US5586338A (en) * 1994-12-22 1996-12-17 Bell Atlantic Mobile Systems, Inc. System identification (SID) list for selecting operating frequencies
US5950130A (en) * 1997-03-18 1999-09-07 Sbc Technology Resources, Inc. Mobile station with intelligent roaming and over-the-air programming features
US5974328A (en) * 1997-01-13 1999-10-26 Airtouch Communications, Inc. Rapid system access and registration in mobile phone systems
US5983115A (en) * 1996-08-13 1999-11-09 Lucent Technologies Inc. Geographic based method for selecting a wireless communications service provider
US6085110A (en) * 1995-06-01 2000-07-04 Telefonaktiebolaget Lm Ericsson Arrangement and method in a mobile communication system for selecting a communication arrangement
US6085085A (en) * 1996-03-27 2000-07-04 Qualcomm Incorporated Method and apparatus for performing preferred system selection
US6148197A (en) * 1998-03-06 2000-11-14 Sbc Technology Resources, Inc. Intelligent roaming system with over the air programming
US6192224B1 (en) * 1996-12-12 2001-02-20 Nec Corporation Multi-band mobile telecommunications station
US6223042B1 (en) * 1997-06-26 2001-04-24 At&T Wireless Services Inc Method of intelligent roaming using network information
US6259917B1 (en) * 1998-12-09 2001-07-10 Sony Corporation Apparatus and method for deriving a current network location from previously visited networks and movements between the previously visited networks
US6298235B1 (en) * 1995-12-12 2001-10-02 At&T Wireless Services, Inc. Powered down selection of a preferable wireless communications service provider in a multi-service provider environment
US6374106B2 (en) * 1992-12-22 2002-04-16 Fujitsu Limited Radio communication system searching method
US6415148B1 (en) * 1999-12-11 2002-07-02 Qualcomm, Incorporated System and method for the detection of service from alternate wireless communication systems
US6487399B1 (en) * 1999-05-26 2002-11-26 Nokia Mobile Phones Ltd. Mobile terminal employing 30kHz/200kHz carrier identification
US6625451B1 (en) * 1999-07-14 2003-09-23 Bell Atlantic Mobile, Inc. Preferred roaming list and system select feature

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5903832A (en) * 1995-12-21 1999-05-11 Nokia Mobile Phones Llimited Mobile terminal having enhanced system selection capability
US6195532B1 (en) * 1996-06-28 2001-02-27 At&T Wireless Srcs. Inc. Method for categorization of multiple providers in a wireless communications service environment
DE19834674A1 (en) * 1998-07-31 2000-02-03 Ericsson Telefon Ab L M Method, exchange, telecommunication system and mobile station for a temporary selective national roaming network at predetermined operation conditions in a mobile radio communication system
KR100695828B1 (en) * 1999-11-26 2007-03-16 유티스타콤코리아 유한회사 Method for selection cell of asynchronous mobile station in asynchronous mobile communication system
DE10036141B4 (en) * 2000-07-25 2005-09-08 Siemens Ag A process for the improved selection of a communications network for a station
US6829481B2 (en) * 2001-05-15 2004-12-07 Novatel Wireless, Inc. Systems and methods for intelligent inter-system handoff
KR20030015531A (en) * 2001-08-16 2003-02-25 엘지전자 주식회사 Cell selection improvement method for third generation terminal
JP4179473B2 (en) * 2002-10-30 2008-11-12 リサーチ イン モーション リミテッドResearch In Motion Limited For selecting a communication network that makes available data services preferentially, methods and devices
US6954649B2 (en) * 2002-12-12 2005-10-11 Motorola, Inc Method and device for choosing a system selection algorithm that is location dependent
US6961569B2 (en) * 2003-05-07 2005-11-01 Motorola Inc Method for a radiotelephone to scan for higher priority public land mobile network
US7333795B2 (en) * 2003-10-24 2008-02-19 Motorola Inc. Emergency call placement method
US7937083B2 (en) * 2005-04-14 2011-05-03 Nokia Corporation Method, apparatus and computer program providing for rapid network selection in a multimode device
US7231213B2 (en) * 2005-06-30 2007-06-12 Motorola Inc. Method to detect a user equipment stuck on a dedicated channel

Patent Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6374106B1 (en) *
US6374106B2 (en) * 1992-12-22 2002-04-16 Fujitsu Limited Radio communication system searching method
US6754491B2 (en) * 1992-12-22 2004-06-22 Fujitsu Limited Radio communication system searching method
US5586338A (en) * 1994-12-22 1996-12-17 Bell Atlantic Mobile Systems, Inc. System identification (SID) list for selecting operating frequencies
US6085110A (en) * 1995-06-01 2000-07-04 Telefonaktiebolaget Lm Ericsson Arrangement and method in a mobile communication system for selecting a communication arrangement
US6311064B1 (en) * 1995-12-12 2001-10-30 At&T Wireless Services, Inc. Powered down selection of a preferable wireless communications service provider in a multi-service provider environment
US6298235B1 (en) * 1995-12-12 2001-10-02 At&T Wireless Services, Inc. Powered down selection of a preferable wireless communications service provider in a multi-service provider environment
US6085085A (en) * 1996-03-27 2000-07-04 Qualcomm Incorporated Method and apparatus for performing preferred system selection
US6466802B1 (en) * 1996-03-27 2002-10-15 Qualcomm Incorporated Method and apparatus for performing preferred system selection
US5983115A (en) * 1996-08-13 1999-11-09 Lucent Technologies Inc. Geographic based method for selecting a wireless communications service provider
US6192224B1 (en) * 1996-12-12 2001-02-20 Nec Corporation Multi-band mobile telecommunications station
US5974328A (en) * 1997-01-13 1999-10-26 Airtouch Communications, Inc. Rapid system access and registration in mobile phone systems
US5950130A (en) * 1997-03-18 1999-09-07 Sbc Technology Resources, Inc. Mobile station with intelligent roaming and over-the-air programming features
US6223042B1 (en) * 1997-06-26 2001-04-24 At&T Wireless Services Inc Method of intelligent roaming using network information
US6148197A (en) * 1998-03-06 2000-11-14 Sbc Technology Resources, Inc. Intelligent roaming system with over the air programming
US6259917B1 (en) * 1998-12-09 2001-07-10 Sony Corporation Apparatus and method for deriving a current network location from previously visited networks and movements between the previously visited networks
US6487399B1 (en) * 1999-05-26 2002-11-26 Nokia Mobile Phones Ltd. Mobile terminal employing 30kHz/200kHz carrier identification
US6625451B1 (en) * 1999-07-14 2003-09-23 Bell Atlantic Mobile, Inc. Preferred roaming list and system select feature
US6415148B1 (en) * 1999-12-11 2002-07-02 Qualcomm, Incorporated System and method for the detection of service from alternate wireless communication systems

Cited By (87)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9426732B2 (en) 2000-10-03 2016-08-23 At&T Mobility Ii Llc Location information erase on SIM cards
US20120149436A1 (en) * 2000-10-03 2012-06-14 Michael Edward Prise Location Information Erase on SIM Card
US9084083B2 (en) 2000-10-03 2015-07-14 At&T Intellectual Property I, L.P. Location information erase on SIM cards
US20070015539A1 (en) * 2000-10-03 2007-01-18 Cingular Wireless Ii, Llc Location information erase on SIM cards
US7406312B2 (en) * 2000-10-03 2008-07-29 Michael Edward Prise Location information erase on SIM cards
US8140118B2 (en) * 2000-10-03 2012-03-20 At&T Mobility Ii Llc Location information erase on SIM cards
US8768413B2 (en) * 2000-10-03 2014-07-01 At&T Mobility Ii Llc Location information erase on SIM card
US20020193112A1 (en) * 2001-04-19 2002-12-19 Kabushiki Kaisha Toshiba Mobile communication apparatus
US8190163B2 (en) 2002-08-08 2012-05-29 Qualcomm Incorporated Methods and apparatus of enhanced coding in multi-user communication systems
US9277470B2 (en) 2002-08-08 2016-03-01 Qualcomm Incorporated Method of creating and utilizing diversity in a multiple carrier communication system
US20040229610A1 (en) * 2002-11-19 2004-11-18 Nec Corporation Cellular network acquisition method and apparatus
US7620395B2 (en) * 2002-11-19 2009-11-17 Nec Corporation Cellular network acquisition method and apparatus
US8553595B2 (en) 2003-02-19 2013-10-08 Qualcomm Incorporated Controlled superposition coding in multi-user communication systems
US8593932B2 (en) 2003-05-16 2013-11-26 Qualcomm Incorporated Efficient signal transmission methods and apparatus using a shared transmission resource
US9386513B2 (en) * 2003-07-29 2016-07-05 T-Mobile Deutschland Gmbh Method for joint use of a radio access network by several mobile radio providers
US20070161373A1 (en) * 2003-07-29 2007-07-12 T-Mobile Deutschland Gmbh Method for joint use of a radio access network by several mobile radio providers
US20050059395A1 (en) * 2003-09-15 2005-03-17 Lg Electronics Inc. Rescan method and apparatus of a mobile terminal
US7613455B2 (en) * 2003-09-15 2009-11-03 Lg Electronics Inc. Rescan method and apparatus of a mobile terminal
US20050213566A1 (en) * 2004-03-29 2005-09-29 Sami Jutila System and method for network selection in a communication system using a shared RAN
US8787334B2 (en) * 2004-08-31 2014-07-22 Blackberry Limited System and method for handling simple IP to mobile IP transition
US20100177705A1 (en) * 2004-08-31 2010-07-15 Research In Motion Limited System and method for handling simple ip to mobile ip transition
US7599693B2 (en) * 2004-09-28 2009-10-06 Nec Corporation Cell search method and mobile communication terminal
US20060068782A1 (en) * 2004-09-28 2006-03-30 Nec Corporation Cell search method and mobile communication terminal
US20060099943A1 (en) * 2004-11-11 2006-05-11 Samsung Electronics Co., Ltd. Apparatus and method for receiving improved roaming service in a mobile terminal
US20060133311A1 (en) * 2004-12-17 2006-06-22 Alcatel Method of improving the management of mobility in a cellular mobile communications system
US7689218B2 (en) 2005-04-14 2010-03-30 Nokia Corporation Method, apparatus and computer program providing network-associated system priority list for multimode system selection
US20060282554A1 (en) * 2005-04-14 2006-12-14 Nokia Corporation Method, apparatus and computer program providing network-associated system priority list for multimode system selection
US20060291427A1 (en) * 2005-06-25 2006-12-28 Park Sun-Yong Method for identifying home cell and apparatus thereof
US8023472B2 (en) * 2005-06-25 2011-09-20 Samsung Electronics Co., Ltd. Method for identifying home cell and apparatus thereof
US20100322426A1 (en) * 2005-08-01 2010-12-23 Ubiquisys Limited Self-configuring cellular basestation
US8660610B2 (en) 2005-08-01 2014-02-25 Ubiquisys Limited Self-configuring cellular basestation
US8655408B2 (en) 2005-08-01 2014-02-18 Ubiquisys Limited Self-configuring cellular basestation
US20080102794A1 (en) * 2005-08-01 2008-05-01 Ubiquisys Limited Self-Configuring Cellular Basestation
WO2007015071A3 (en) * 2005-08-01 2007-05-24 Ubiquisys Ltd Automatic base station configuration
US20100190495A1 (en) * 2005-08-01 2010-07-29 Ubiquisys Limited Automatic base station configuration
US20100227645A1 (en) * 2005-08-01 2010-09-09 Ubiquisys Limited Automatic base station configuration
US20080304439A1 (en) * 2005-08-01 2008-12-11 Peter Keevill Automatic Base Station Configuration
US9144111B2 (en) 2005-08-01 2015-09-22 Ubiquisys Limited Self-configuring cellular basestation
US20100317405A1 (en) * 2005-08-01 2010-12-16 Ubiquisys Limited Self-configuring cellular basestation
US8676262B2 (en) 2005-08-01 2014-03-18 Ubiquisys Limited Self-configuring cellular basestation
EP1929808B1 (en) * 2005-08-18 2016-12-21 Qualcomm Incorporated System search to detect for a wireless communication network in a crowded frequency band
WO2007103991A3 (en) * 2006-03-07 2008-01-17 Mukesh K Mittal Method and apparatus for searching radio technologies
US20070211669A1 (en) * 2006-03-07 2007-09-13 Bhupesh Manoharlal Umatt Method and apparatus for searching radio technologies
WO2007103991A2 (en) 2006-03-07 2007-09-13 Qualcomm Incorporated Method and apparatus for searching radio technologies
EP2184938A1 (en) 2006-03-07 2010-05-12 QUALCOMM Incorporated Method and apparatus for searching radio technologies
JP2009529837A (en) * 2006-03-07 2009-08-20 クゥアルコム・インコーポレイテッドQualcomm Incorporated Method and apparatus for searching a wireless communication technology
KR101019003B1 (en) * 2006-03-07 2011-03-07 퀄컴 인코포레이티드 Method and apparatus for searching radio technologies
US20070270147A1 (en) * 2006-05-17 2007-11-22 Samsung Electronics Co., Ltd. Apparatus and method for scanning a home public land mobile network in a mobile communication terminal
US8565762B2 (en) 2006-05-17 2013-10-22 Samsung Electronics Co., Ltd. Apparatus and method for scanning a home public land mobile network in a mobile communication terminal
EP1858279A3 (en) * 2006-05-17 2009-03-25 Samsung Electronics Co., Ltd. Apparatus and method for scanning a home public land mobile network in a mobile communication terminal
US8630641B2 (en) * 2006-06-21 2014-01-14 Samsung Electronics Co., Ltd Apparatus and method for reselecting a public land mobile network in a mobile communication terminal
US20070298801A1 (en) * 2006-06-21 2007-12-27 Samsung Electronics Co., Ltd. Apparatus and method for reselecting a public land mobile network in a mobile communication terminal
US20080146223A1 (en) * 2006-12-14 2008-06-19 Motorola, Inc. Method and system for selecting a communication network
US8954070B2 (en) 2006-12-14 2015-02-10 Google Technology Holdings LLC Method and system for selecting a communication network
US20080153486A1 (en) * 2006-12-22 2008-06-26 Telefonaktiebolaget L M Ericsson (Publ) Efficient PLMN Search Order
US9432942B2 (en) 2007-01-11 2016-08-30 Qualcomm Incorporated Using DTX and DRX in a wireless communication system
US8755313B2 (en) 2007-01-11 2014-06-17 Qualcomm Incorporated Using DTX and DRX in a wireless communication system
US9674786B2 (en) 2007-01-11 2017-06-06 Qualcomm Incorporated Using DTX and DRX in a wireless communication system
US8744452B2 (en) 2007-02-02 2014-06-03 Ubiquisys Limited Receiving signals from surrounding basestations
US8849279B2 (en) 2007-02-23 2014-09-30 Ubiquisys Limited Basestation for cellular communications system
US8483760B2 (en) 2007-02-23 2013-07-09 Ubiquisys Limited Basestation for cellular communications system
KR101528376B1 (en) * 2007-03-06 2015-06-11 텔레폰악티에볼라겟엘엠에릭슨(펍) Data sharing among radio access technologies
US20080220778A1 (en) * 2007-03-06 2008-09-11 Telefonaktiebolaget L M Ericsson (Publ) Data Sharing among Radio Access Technologies
US8014342B2 (en) * 2007-03-06 2011-09-06 Telefonaktiebolaget L M Ericsson (Publ) Data sharing among radio access technologies
US9532377B2 (en) 2007-08-03 2016-12-27 Interdigital Patent Holdings, Inc. System level information for discontinuous reception, cell reselection and RACH
US9173167B2 (en) 2007-08-03 2015-10-27 Interdigital Patent Holdings, Inc. System level information for discontinuous reception, cell reselection and rach
US20140010136A1 (en) * 2007-08-03 2014-01-09 Interdigital Patent Holdings, Inc. System level information for discontinuous reception, cell reselection and rach
US9351249B2 (en) * 2007-08-03 2016-05-24 Interdigital Patent Holdings, Inc. System level information for discontinuous reception, cell reselection and RACH
US20090116441A1 (en) * 2007-11-07 2009-05-07 Samsung Electronics Co. Ltd. Network connection method for mobile terminal in asynchronous mobile communication system
US8750871B2 (en) * 2007-11-07 2014-06-10 Samsung Electronics Co., Ltd. Network connection method for mobile terminal in asynchronous mobile communication system
US20090124224A1 (en) * 2007-11-14 2009-05-14 Infineon Technologies Ag Radio communication device, receiver controller of a radio communication device, and method for searching for a radio cell
US8543062B2 (en) 2007-11-14 2013-09-24 Intel Mobile Communications GmbH Radio communication device, receiver controller of a radio communication device, methods for searching for a radio cell
US8023896B2 (en) * 2007-11-14 2011-09-20 Infineon Technologies Ag Radio communication device, receiver controller of a radio communication device, and method for searching for a radio cell
DE102008057064B4 (en) * 2007-11-14 2012-03-08 Infineon Technologies Delta Gmbh Radio communication device, receiver control unit of a radio communication apparatus and method for searching for a radio cell
US20100261474A1 (en) * 2008-01-30 2010-10-14 Nec Corporation Plmn selection in multi-network environment
WO2009096496A1 (en) * 2008-01-30 2009-08-06 Nec Corporation Plmn selection in multi-network environment
US8929893B2 (en) * 2008-01-30 2015-01-06 Nec Corporation PLMN selection in multi-network environment
WO2010123416A1 (en) * 2009-04-20 2010-10-28 Telefonaktiebolaget L M Ericsson (Publ) A method of frequency search
US20150296449A1 (en) * 2012-12-28 2015-10-15 Huawei Technologies Co., Ltd. Method and device for network selection from shared network
US9838958B2 (en) * 2012-12-28 2017-12-05 Huawei Technologies Co., Ltd. Method and device for network selection from shared network
CN104025664A (en) * 2012-12-28 2014-09-03 华为技术有限公司 Method and device for network selection from shared network
EP2941059A4 (en) * 2012-12-28 2016-01-13 Huawei Tech Co Ltd Method and device for network selection from shared network
US9749946B2 (en) * 2013-03-11 2017-08-29 Qualcomm Incorporated Method and apparatus for improved reselection during mode transitions
US20140256327A1 (en) * 2013-03-11 2014-09-11 Qualcomm Incorporated Method and apparatus for improved reselection during mode transitions
US20170318611A1 (en) * 2013-08-05 2017-11-02 Sharp Kabushiki Kaisha Wireless communication system, terminal apparatus, base station apparatus, wireless communication method, and integrated circuit
US9525995B2 (en) * 2015-05-05 2016-12-20 Apple Inc. Mobile device with improved network selection while roaming
US9706561B1 (en) * 2015-08-25 2017-07-11 Sprint Spectrum L.P. Method and system for managing quantity of carriers in air interface connection based on public land mobile network to which a user equipment device subscribes

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