WO2010083779A1

WO2010083779A1 - Mobility management method and mobile terminal

Info

Publication number: WO2010083779A1
Application number: PCT/CN2010/070344
Authority: WO
Inventors: 王济勇; 余勇军; 赵旸
Original assignee: 华为技术有限公司
Priority date: 2009-01-23
Filing date: 2010-01-25
Publication date: 2010-07-29
Also published as: CN101790208A

Abstract

A mobility management method and mobile terminal are provided, which relate to radio communication field and enable mobility management when a mobile terminal with a high version can not move from a network in which the mobile terminal is currently residing to a network which is supported by the mobile terminal but not supported by the network where the mobile terminal is currently residing. The method includes the following steps: when the version of the network in which the mobile terminal is currently residing is prior to Release 8, or in other cases the frequencies of the networks supported by the mobile terminal but not included in the neighbour cell list are searched; according to the searched out frequencies, cells of the networks are searched and measurements are performed to the searched out cells; it is determined whether to move to the cell according to the measurement results. The mobile terminal includes: a searching unit, measurement unit and moving unit. The present invention is applicable to the situation that a mobile terminal moves from the currently serving network to the network supported by the mobile terminal but not included in the neighbour cell list.

Description

Mobile management method and mobile terminal

This application claims the priority of the Chinese Patent Application, filed on Jan. 23, 2009, the application Serial No. in. Technical field

The present invention relates to the field of wireless communications, and in particular, to a mobile management method and a mobile terminal. BACKGROUND OF THE INVENTION With the rapid development of communication technologies and the increasing demands of users for communication quality and data service speed, an LTE (Long Term Evolution) network that provides high-speed data service services has emerged. With the development of technology LTE network, the LTE network will be and ^{2G / 3G (2 nd Generation /} 3 rd Generation, second generation mobile communication technology / third generation mobile communication technology) in a communication network coexistence of networks.

In order to achieve smooth mobility between LTE networks and 2G/3G networks, 2G/3G networks must be upgraded to enable switching, reselection and other mobility management with LTE networks. The most basic requirement for the upgrade of the 2G/3G network is to increase the LTE neighbor cell information in the same coverage when the neighbor cell list information is sent in the 2G/3G network, so that the mobile terminal can measure the LTE neighbor when measuring the neighbor cell. The cell, when the signal quality of the LTE neighboring cell meets the requirements, the mobile terminal can switch or reselect to the LTE network. In order to support the LTE network, the mobile terminal must also be an upgraded version of the mobile terminal.

In the actual network, there may be cases where the network is incompatible with the version of the mobile terminal. For example, a high-end mobile terminal supporting LTE is in an un-upgraded low-level 2G/3G network, although an LTE network is also covered in the network coverage. However, since the LTE cell information is not included in the neighbor cell list information sent by the network side when the mobile terminal is camped on the lower version of the 2G/3G network, the mobile terminal cannot measure the LTE cell and move to the LTE network. That is, smooth movement cannot be achieved between the 2G/3G network and the LTE network. Since the LTE network has high-speed data service capability, the mobile terminal with the LTE network subscription capability is expected to be able to perform data services in the LTE network, and since the lower version of the 2G/3G network cannot interact with the LTE network, the station is stationed at a low level. The higher version of the mobile terminal in the version 2G/3G network can only perform handover or cell reselection in the 2G/3G network, and cannot move to the LTE network to run the service. In other situations, although the network is also a high version, different operators have different requirements when laying out the network. For example, although some networks are upgraded to higher versions, the carrier does not support LTE or other networks, so it is issued. The neighbor cell information does not include the LTE neighbor cell list information. In this case, although there is LTE network coverage, the mobile terminal cannot move to the LTE network.

The network supported by the mobile terminal but not supported by the access network described herein means that the mobile terminal has the access network capability, but the access network camped by the mobile terminal cannot communicate with the network, that is, The neighboring cell list delivered in the access network where the mobile terminal is located does not include the cell of the network, for example, the mobile terminal is camped on a lower version of the GERAN network, and the LTE network is also covered by the GERAN network, because the GERAN network The version is lower, so the GERAN network does not include the cell information of the LTE network when transmitting the neighbor cell list information to the mobile terminal, so that the mobile terminal cannot move to the LTE network by reselecting, switching, or redirecting from the camped GERAN network. Another example is that the networks operated by two different operators are GERAN network high version (or other network) and LTE network (or other network). These two networks are covered in the same area, when the mobile terminal is stationed in the high version. In the case of the GERAN network (Release 8 or later), since there is no mutual mobility protocol between the two operators, the neighboring cell information will not be sent to the other carrier when the neighboring cell information is sent to the mobile terminal in the high-grade GERAN network. Cell information of the LTE network. Therefore, at this time, the mobile terminal cannot move to the LTE network through reselection, handover, or redirection from the camped high-level GERAN network. SUMMARY OF THE INVENTION Embodiments of the present invention provide a mobility management method and a mobile terminal, which are capable of solving a problem that a mobile terminal cannot move from a currently served network to a mobile terminal but is not included in a neighbor cell list. The mobile management process of the network.

In one aspect, the present invention provides a mobility management method, including:

When the signal strength and/or signal quality of the serving cell is lower than the set threshold P艮, searching for the frequency of the network supported by the mobile terminal but not in the neighbor cell list;

Searching for a cell of the network according to the searched frequency, and measuring the searched cell;

Whether to move to the cell is determined based on the result of the measurement. In another aspect, the present invention also provides a mobile terminal capable of solving a mobility management procedure in which a higher version mobile terminal cannot move from a currently served network to a network supported by the mobile terminal but not included in the neighbor cell list.

The mobile terminal includes:

a searching unit, configured to: when the signal strength and/or signal quality of the serving cell is lower than a set threshold, search for a frequency that the mobile terminal can support but does not exist in the neighbor cell list, and according to the searched frequency, Searching for a cell of the network;

a measuring unit, configured to measure the searched cell;

a mobile unit, configured to determine whether to move to the network according to a result of the measurement.

As can be seen from the above description, the mobile terminal can move to the available cell when detecting a suitable available cell, and implement mobile management of the mobile terminal from the currently served network to the mobile terminal but not included in the neighbor cell list. . BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a flowchart of a mobility management method according to an embodiment of the present invention;

2 is a flowchart of a mobility management method according to an embodiment of the present invention;

3 is a flowchart of a mobile management method according to another embodiment of the present invention; FIG. 4 is a schematic diagram of a mobile terminal according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a mobile terminal according to another embodiment of the present invention; FIG. FIG. 6 is a schematic diagram of a mobile terminal according to still another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for moving a mobile terminal and a mobile terminal to a network supported by the mobile terminal but not supported by the access network according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

It should be understood that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative work are within the scope of the present invention.

As shown in FIG. 1 , a flowchart of a mobility management method according to an embodiment of the present invention is applied to a network that is moved by a mobile terminal to a mobile terminal but is not supported by the camped access network, and may be as follows.

S10K If the version of the network currently camped on is a version prior to Release 8, or when the signal strength and/or signal quality of the serving cell is lower than the set threshold P艮, or when the signal strength of the serving cell and the same-band neighboring cell And/or the signal quality is lower than the set threshold P艮, or when the signal strength and/or signal quality of the serving cell and all neighboring cells are lower than the set threshold, searching for the mobile terminal support but the neighbor cell list The frequency of the network that does not exist.

5102. Search for a cell of the network according to the searched frequency, and measure the searched cell.

5103. Determine, according to the result of the measurement, whether to move to the network.

For example, the mobile terminal is a high-grade mobile terminal, for example, capable of supporting one or more of GERAN, UTRAN, LTE, or WiMax. The mobile terminal is camped on an un-upgraded 2G/3G network, including: a network before Release 8. The network supported by the mobile terminal and supported by the access network may be GERAN, UTRAN, LTE or WiMax. In step S103, the mobile terminal moves to the network supported by the mobile terminal but does not exist in the neighbor cell list may be completed by switching, reselecting or redirecting.

The mobile management method of the embodiment of the present invention can search for a mobile terminal to support but does not exist in the current neighbor cell list when it is determined to be a specific network condition when entering the currently served network. Frequency of the network, searching for a cell of the network according to the searched frequency, and when searching for a cell of the network, performing measurement on the cell, and finally determining whether to move to the network according to the result of the measurement, thereby It is possible to implement mobility management of a mobile terminal moving from a currently served network to a network supported by the mobile terminal but not present in the neighbor cell list.

The present invention will be described in detail below by taking an example in which a high-order mobile terminal reselects a 2G/3G network that has never been upgraded to an LTE network. However, the present invention is not limited thereto, and a high-grade mobile terminal moves from a non-upgraded 2G/3G network to a network such as GERAN, UTRAN, or WiMax, or between networks of different network operators such as GERAN, UTRAN, LTE, or WiMax. For the mobile, the solution of the embodiment of the present invention can be adopted.

As shown in FIG. 2, it is a schematic flowchart of a mobility management method according to another embodiment of the present invention, and the method may be as follows.

S20K Before the mobile terminal leaves the LTE network, the LTE network sends an indication parameter to the mobile terminal, indicating whether the mobile terminal needs to search for the frequency of the LTE network when entering the unupgraded 2G/3G network or other network.

For example, the mobile terminal is a high-end mobile phone, supports an LTE network, and supports one or more of GERAN, and UTRAN, and WiMax. In practice, these four networks can be supported. The network to be removed by the mobile terminal in the embodiment of the present invention is not limited to the LTE network, and may also be a network such as GERAN, UTRAN or WiMax.

In this embodiment, the LTE network indicates that the mobile terminal needs to search for the frequency of the LTE network when entering the unupgraded 2G/3G network or other network. The present invention is not limited to this, and the LTE network may not send the indication parameter, and the mobile terminal does not need to determine whether to search for the frequency of the LTE network according to the indication parameter sent by the LTE network when entering the other network. In this case, this step and step S204 can be omitted.

S202. When the mobile terminal leaves the LTE network, save one or more of a parameter related to cell reselection of the LTE network, frequency list information of the LTE network, and the LIE network priority information.

When the mobile terminal leaves the LTE network or other network, the above information can be guaranteed. Save, or just save some of the information, for example, can be determined according to the actual situation. In an embodiment of the invention, this step is an optional step.

5203. The mobile terminal determines whether the currently served network version is an unupgraded version (a version prior to Release 8). If yes, the process proceeds to the next step; if not, only the neighbor cells included in the neighbor cell list are measured.

In another embodiment of the present invention, the threshold of the signal strength and/or the signal quality may be preset in advance without determining the currently served network version, when the signal strength and/or signal quality of the serving cell is lower than a fixed gate P艮 value, or when the signal strength and/or signal quality of the serving cell and the same-band neighboring cell are below a set threshold, or when the signal strength and/or signal quality of the serving cell and all neighboring cells are low At the set threshold, proceed to the next step.

5204. The mobile terminal determines, according to the indication sent by the LTE network in step S201, the frequency of searching for the LTE network.

5205. If the priority of the LTE network is higher than the priority of the access network where the current mobile terminal is located, the mobile terminal searches for all the frequencies in the saved LTE network frequency list periodically or according to other trigger conditions.

In another embodiment of the present invention, the priority information may not be compared, that is, whether the priority of the LTE network is higher than the priority of the access network where the current mobile terminal is located, the mobile terminal searches for the LTE network according to the foregoing process. Frequency in the frequency list information.

5206. Determine, according to the result of the search, whether an LTE cell exists. If yes, continue with the following steps; if no, go to step S211.

5207. Measure the LTE cell.

For example, cell coverage, mobile terminal communication quality, and the like can be measured.

S208: Read a system message of the LTE cell, and obtain a parameter that is reselected with a cell. This step is aggregated as an option, and the system message of the LTE cell may not be read.

S209. Determine whether the LTE cell meets a cell reselection condition. If yes, proceed to step S210, if no, if not, go to step S211.

For example, according to the result of the measurement and the parameters of the cell reselection saved in step S202, Or the parameter of the cell reselection acquired in step S208, to determine whether the LTE cell satisfies the cell reselection condition.

S210. The mobile terminal reselects to the searched LTE cell.

The present invention is not limited thereto, and depending on the feasibility of the technology, it is also possible to switch or redirect to the searched LTE cell.

The S21K mobile terminal searches for the frequency of the LTE network at full frequency.

When it is found in step S206 that there is no LTE cell, or S208 does not find a cell that meets the cell reselection condition, the mobile terminal searches for the frequency of the LTE network at full frequency.

5212. Determine whether there is an LTE cell according to the result of the search. If yes, proceed to step S213.

5213. Measure the LTE cell.

5214. Read a system message of the LTE cell, and obtain parameters related to cell reselection. This step is aggregated as an option, and the system message of the LTE cell may not be read.

5215. Determine whether the LTE cell meets a cell reselection condition. If yes, reselect to the LTE cell.

On the basis of the foregoing first embodiment, the method for reselecting the mobile terminal to the LTE network in the embodiment of the present invention may further include: the mobile terminal enters the serving cell of the unupgraded 2G/3G network, and the cell also covers the LTE network. Or other networks, such as: GERAN, UTRAN, LTE, or WiMax networks. The mobile terminal itself decides whether it is necessary to search for a network (e.g., GERAN, UTRAN, LTE, or WiMax network) that is not supported by the unupgraded 2G/3G network, that is, the user controls whether the mobile terminal searches for the network. These networks are not included in the list of neighboring cells.

Embodiment 2

As shown in FIG. 3, the method for re-selecting a mobile terminal to an LTE network in this embodiment includes: before the S30K mobile terminal leaves the LTE network, the LTE network sends an indication parameter to the mobile terminal, indicating that the mobile terminal is entering the unupgraded 2G/ Whether to search for the frequency of the LTE network when using a 3G network or other network.

The mobile terminal is a high-grade mobile terminal, supports an LTE network, and any one or several of GERAN, and/or UTRAN, and/or WiMax. In this embodiment, an LTE network Instructing the mobile terminal to search for the frequency of the LTE network when entering the lower version 2G/3G network. The present invention is not limited to this. Before the mobile terminal leaves, the LTE network may not send the indication parameter, and the mobile terminal does not need to determine whether to search for the LTE network according to the indication parameter sent by the LTE network when entering the other network. frequency. In this case, steps S301, S304 may be omitted.

5302. When the mobile terminal leaves the LTE network, the frequency list information, the priority information, and the parameters related to the cell reselection of the LTE network are saved.

In another embodiment of the present invention, when leaving the LTE network, the mobile terminal may not save the foregoing information, or may only save part of the information, such as storing the frequency list information of the LTE network, and may also save all the information. This step is an optional step.

5303. The mobile terminal determines whether the currently served network version is an unupgraded version (a version prior to Release 8). If yes, the process proceeds to the next step; if not, only the neighbor cells included in the neighbor cell list are measured.

In another embodiment of the present invention, the threshold of the signal strength and/or the signal quality may be preset in advance without determining the currently served network version, when the signal strength and/or signal quality of the serving cell is lower than the setting. Threshold of the threshold, or when the signal strength and/or signal quality of the serving cell and the same-band neighboring cell are lower than the set threshold P艮, or when the signal strength and/or signal quality of the serving cell and all neighboring cells are low At the set threshold, proceed to the next step.

5304. The mobile terminal determines, according to the indication of the LTE network in step S301, the frequency of searching for the LTE network.

5305. The mobile terminal acquires priority information from the core network from the SIM card or through NAS (Non-Access Stratum) signaling, and information related to the priority cell reselection algorithm.

The NAS signaling includes: one or more of a location area update, a routing area update, or a signaling of a tracking area update procedure, and other available signaling. Wherein, the embodiment of the present invention can obtain only one of the above information.

In an embodiment, the operation of obtaining priority information and information related to the priority cell reselection algorithm may be performed before or after searching for the frequency of the LTE network. 5306. If the priority of the LTE network is higher than the priority of the access network where the current mobile terminal is located, the mobile terminal searches for the frequency in the LTE frequency list information.

In another embodiment of the present invention, the priority information may not be compared, and the mobile terminal searches for the frequency in the LTE frequency list information according to the following procedure.

For example, the search process is as follows: The mobile terminal searches for all frequencies in the saved LTE frequency list periodically or according to other trigger conditions. If no available cells are found, the LTE frequency is searched at full frequency.

5307. When the mobile terminal searches for an available cell, the cell is measured.

For example, cell coverage, MS communication quality, etc. can be measured.

S308. The system message of the LTE cell is read, and parameters related to cell reselection are obtained. This step is aggregated as an option, and the system message of the LTE cell may not be read.

5309. If the LTE cell meets a cell reselection condition, the mobile terminal reselects to the LTE cell.

Whether the LTE cell satisfies the cell reselection condition may be determined according to the result of the measurement and the related parameters of the cell reselection saved in step S302, or the parameters related to the cell reselection obtained in step S308.

The higher version mobile terminal of this embodiment can determine whether it is necessary to search for the frequency of the LTE network by acquiring priority information from the core network or by NAS signaling from the core network, and perform measurement after searching for the LTE cell, if the LTE cell can In accordance with the predetermined requirement, that is, the reselectable target LTE cell, the mobile terminal reselects to the searched LTE cell.

The present invention is not limited thereto. In the foregoing step S306, when the LTE priority is lower than the priority of the currently located access network, the mobile terminal periodically searches for all frequencies in the saved LTE list or Do not search.

On the basis of the foregoing second embodiment, the method for reselecting the mobile terminal to the LTE network in the embodiment of the present invention may further include: the mobile terminal enters the serving cell of the unupgraded 2G/3G network, and the cell also covers the LTE network. Or other networks, such as: GERAN, UTRAN, LTE, or WiMax networks. The mobile terminal itself decides whether it is necessary to search for a non-upgraded 2G/3G network that is not supported. A network (such as a GERAN, UTRAN, LTE, or WiMax network), that is, the frequency at which the user controls whether the mobile terminal searches for the network. The frequency information of these networks is not included in the neighbor cell list.

Embodiment 3

The mobile terminal does not have LTE frequency list information and/or related priority information. When the mobile terminal is camped on the un-upgraded 2G/3G network, the mobile terminal periodically searches for the frequency of the LTE network when determining that the network to be camped on is a Realease8 network. The search frequency range is supported by the mobile terminal but in the neighbor cell list. The frequency of the LTE network that does not exist, if it is found that there is an LTE cell, it is measured. According to the measurement result, if an LTE cell that satisfies the cell reselection condition is found, it is reselected into the LTE cell.

In another embodiment of the present invention, the system message of the searched LTE cell may be read, parameters related to cell reselection are obtained, and the searched LTE cell is determined according to the measurement result or the cell reselection related parameter. Meet the cell reselection conditions.

In another embodiment of the present invention, the gate strength of the signal strength and/or the signal quality may also be set, when the signal strength and/or signal quality of the serving cell is lower than the set threshold P艮, or when When the signal strength and/or signal quality of the serving cell and the same-band neighboring cell are lower than the set threshold P艮, or when the signal strength and/or signal quality of the serving cell and all neighboring cells are lower than the set gate P艮In the case of the value, the mobile terminal searches for the frequency of the LTE network, and the search range is the LTE network supported by the mobile terminal but not in the neighbor cell list. If the LTE neighboring cell is found, the LTE neighboring cell is detected, and the search is also performed. The system message of the LTE cell acquires parameters related to cell reselection, and according to the measurement result or the cell reselection related parameter, if it is found that there is an LTE cell that satisfies the cell reselection condition, it is reselected into the LTE cell.

In another embodiment of the present invention, the user controls whether the mobile terminal searches for the frequency of the network through the human machine interface. When the user triggers the mobile terminal to start searching for the LTE network, the mobile terminal searches for all the LTE frequencies supported by the mobile terminal. If the LTE cell is found, the LTE cell is measured, and the system message of the searched LTE cell is also read. Parameters related to cell reselection. According to the measurement result or the parameters related to cell reselection, if it is found that the cell reselection is satisfied The conditional LTE cell is reselected into the LTE cell.

The present invention is not limited thereto, and the mobile terminal may also switch or redirect to the LTE cell when discovering a suitable LTE cell, as the technology allows.

In the above various search cases, if the available cell is not found, the mobile terminal searches for the frequency of the LTE network at full frequency; after finding the reselectable target LTE cell, it reselects to the appropriate LTE cell.

Although the foregoing specific embodiments all take the LTE network as an example, the present invention is not limited thereto, and these networks may also be GERAN, UTRAN, or WiMax. The mobile terminal capable of supporting the present embodiment is a high-end mobile terminal described in the present application.

When the mobile terminal of the higher version moves to the un-upgraded 2G/3G network, it searches for all LTE frequency bands supported by the mobile terminal under certain network conditions, or searches for all frequencies in the LTE frequency list saved by the mobile terminal first. If the available cell is not found, the frequency of the LTE network is searched at full frequency; after the reselectable target LTE cell is found, it is reselected to the appropriate LTE cell. Thus, embodiments of the present invention enable high-end mobile terminals to move from un-allocated 2G/3G networks to other networks not supported by 2G/3G networks covered in the same area.

Embodiment 4

When the mobile terminal leaves the LTE network, the frequency list information of the LTE network, the priority information, and parameters related to cell reselection of the LTE network are saved. The mobile terminal may also retain only one or both of the frequency list information, or also the other two types of information. How much information needs to be saved by the mobile terminal, which can be determined according to actual needs. At the same time, the LTE network sends an indication that the frequency of the LTE network needs to be searched when the mobile terminal enters other networks.

The mobile terminal enters the high version of the GERAN network (release 8 or later) and is camped on the network. In the cell of the network, the same LTE network is covered.

And the GERAN network and the LTE network operated by different operators, there is no mutual movement between the protocol ₀

The mobile terminal determines that the LTE frequency needs to be searched according to the indication sent by the LTE network. As in the first embodiment, the second or the third embodiment, the mobile terminal determines that the version of the network currently camped on is Release 8. Previous versions, or when the signal strength and/or signal quality of the serving cell is below a set threshold, or when the signal strength and/or signal quality of the serving cell and the same-band neighboring cell are below a set threshold Or, when the signal strength and/or signal quality of the serving cell and all neighboring cells are lower than the set threshold, the frequency of the network supported by the mobile terminal but not in the neighbor cell list is searched for.

The mobile terminal first searches for all frequencies in the stored frequency list of the LTE network. If there is no available cell, the frequency of the LTE network is searched at full frequency. If an LTE cell is found, it is measured, and the searched can also be read. The system message of the LTE cell acquires parameters related to cell reselection, and determines whether the cell is a reselectable target LTE cell according to the measurement result, and if yes, reselects to the target LTE cell.

The mobile terminal can be moved to the LTE network in any one of the foregoing embodiments, the second, or the third, and can be moved by means of reselection, switching, or redirection, and details are not described herein again. The mobile terminal capable of supporting the present embodiment is a high-end mobile terminal described in the present application. Moreover, the embodiment is not limited to the movement between the LTE network and the GERAN network, and may also be a movement between networks such as LTE, GERAN, UTRAN, or WiMax.

Through the method adopted by the embodiment of the present invention, the high-grade mobile terminal can move from the un-upgraded network to the mobile terminal support and the network that is not supported by the current un-upgraded network, or the high-grade mobile terminal can also be implemented in two different operators. The two networks that are operated and do not have a mutual mobility protocol are moved between each other. Therefore, embodiments of the present invention implement mobility management between the network in which the mobile terminal is not included in the neighboring cell list.

As shown in FIG. 4, an embodiment of the present invention further provides a mobile terminal, including: a search unit 401, a measuring unit 402, and a mobile unit 403.

The searching unit 401 is configured to: before the version of the currently camped network is Release-8, or when the signal strength and/or signal quality of the serving cell is lower than a set threshold, or when the serving cell and the same The signal strength and/or signal quality of the band neighboring cell is lower than the set gate P艮 value, or when the signal strength and/or signal quality of the serving cell and all neighboring cells are lower than the set gate P艮 value, the search mobile The terminal can support the frequency of the network that does not exist in the neighbor cell list, and searches for the cell of the network according to the searched frequency. The measuring unit 402 is configured to perform measurement on the searched cell.

The mobile unit 403 is configured to determine, according to the result of the measurement, whether to move to the network. In the mobile terminal of the embodiment of the present invention, the search unit searches for the frequency of the network that the mobile terminal can support but does not exist in the neighbor cell list, and searches for the cell of the network according to the searched frequency, When the search unit searches for the cell of the network, the cell is measured by the measurement unit, and then the mobile unit determines whether to move to the network according to the result of the measurement, so that the mobile terminal can be implemented by the unupgraded 2G/ The purpose of the 3G network moving to the network covered in the same area. Such mobile terminals are high-end mobile terminals that support one or more of networks such as GERAN, UTRAN, LTE, or WiMax. The network that the mobile terminal can support but does not exist in the neighbor cell list includes one or more of networks such as GERAN, UTRAN, LTE, or WiMax.

As shown in FIG. 5, in another preferred embodiment of the present invention, the mobile terminal further includes: a storage unit 404 and a first determining unit 405.

The storage unit 404 is configured to save frequency list information of the network, priority information of the network, and the network when leaving a network supported by the mobile terminal but not supported by the access network. The cell reselection related parameters.

The first determining unit 405 is configured to perform priority reselection according to the information stored by the storage unit 404, and determine, according to the priority of the network and the access network where the mobile terminal is camped. Whether the search unit searches for all frequencies in the saved frequency list information of the network.

In an embodiment of the present invention, the mobile terminal may further include a second determining unit, configured to determine whether a version of the currently camped network is a version before Release 8, and determine whether the search unit 401 is Searching for all frequency bands of the network supported by the mobile terminal or all frequencies in the frequency list of the network held by the mobile terminal.

In other embodiments of the present invention, as shown in FIG. 6, the mobile terminal may further include: a setting unit 406 and a third determining unit 407.

The setting unit 406 is configured to set a gate P艮 value of signal strength and/or signal quality. The third determining unit 407 is configured to determine whether the signal strength and/or signal quality of the serving cell is lower than a set threshold, or a signal strength and/or a signal of the serving cell and the neighboring cell in the same frequency band. Whether the quality is lower than the set threshold P艮, or whether the signal strength and/or signal quality of the serving cell and all neighboring cells are lower than the set threshold P艮; and determining the search unit according to the result of the judgment 401 Whether to search all frequency bands of the network supported by the mobile terminal or all frequencies in the frequency list of the network saved by the mobile terminal.

The setting unit 406 and the third determining unit 407 may also be included in the embodiment shown in FIG. 5. The second determining unit may also be included in this embodiment.

In other embodiments of the present invention, the mobile terminal may further include: an obtaining unit and a fourth determining unit.

And an obtaining unit, configured to, when leaving the network supported by the mobile terminal but not in the neighbor cell list, obtain an indication of whether a cell of the network needs to be searched when entering another network.

And a fourth determining unit, configured to determine, according to a result obtained by the obtaining unit, whether the search unit 401 searches for a frequency of the network when entering another network.

For example, when the mobile terminal leaves the LTE network, the LTE network will send an instruction to the mobile terminal, indicating whether the mobile terminal needs to search for the frequency of the LTE network when entering the unupgraded 2G/3G network. Then, the mobile terminal acquires an indication of whether to search for the frequency of the LTE network through the acquiring unit, and when entering the unupgraded 2G/3G network, determines whether the search unit is to perform a search according to the indication.

The mobile terminal of the embodiment of the present invention can determine whether it is necessary to perform the search of the relevant frequency of the network according to the indication of the network that the mobile terminal originally left under the specific network condition when entering the un-allocated access network. Determining whether the frequency of the network needs to be searched by priority reselection, and reselecting, switching, or redirecting to the target cell when the reselectable target cell is obtained, so that the mobile terminal is not upgraded. The network moves to a network such as GERAN, UTRAN, LTE, or WiMax that covers the same area. And embodiments of the present invention are also capable of moving between two networks operated by two different operators that do not have a mutual mobility protocol. Thus, embodiments of the present invention achieve the purpose of mobile management between a camped network and a network not included in a neighbor cell list. A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working processes of the system, the device and the unit described above can refer to the corresponding processes in the foregoing method embodiments, and are not mentioned here.

In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separate, or may be distributed over multiple network elements. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may also be stored in a computer readable storage medium.

A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. In execution, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, or a read-only storage memory.

(Read-Only Memory, ROM) or Random Access Memory (RAM).

The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not It is to be understood that those skilled in the art are susceptible to variations and substitutions within the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Rights request

1. A mobile management method, comprising:

When the signal strength and/or signal quality of the serving cell is lower than the set threshold P艮, searching for the frequency of the network supported by the mobile terminal but not included in the neighbor cell list;

Whether to move to the cell is determined based on the result of the measurement.

2. The method according to claim 1, wherein, when the signal strength and/or signal quality of the serving cell is lower than a set threshold, searching for a frequency of a network supported by the mobile terminal but not included in the neighbor cell list Also includes:

When the signal strength and/or signal quality of the serving cell and the same-band neighboring cell are lower than the set threshold value, the frequency of the network supported by the mobile terminal but not included in the neighbor cell list is searched.

3. The method according to claim 1, wherein, when the signal strength and/or signal quality of the serving cell is lower than a set threshold, searching for a frequency of a network supported by the mobile terminal but not included in the neighbor cell list Also includes:

When the signal strength and/or signal quality of the serving cell and all neighboring cells are lower than the set threshold P艮, the frequency of the network supported by the mobile terminal but not included in the neighbor cell list is searched.

4. The method of claim 1 further comprising:

Saving the frequency list information of the network when leaving the network supported by the mobile terminal but not included in the neighbor cell list;

The frequency of the network supported by the search mobile terminal but not included in the neighbor cell list includes: searching for a frequency in the frequency list information.

5. The method of claim 4, the method further comprising:

When leaving the network supported by the mobile terminal but not included in the neighbor cell list, the priority information of the network is saved; or the priority information of the network and parameters related to cell reselection of the network are saved.

6. The method of claim 5, prior to searching for frequencies of the network Further includes:

Determining whether the priority of the network is higher than a priority of the access network currently camped by the mobile terminal;

If so, all frequencies in the saved network frequency list information are searched.

7. A method according to any one of claims 4 to 6, the method further comprising searching for the frequency of the network at full frequency if no available cells are searched.

8. The method of claim 1, the method further comprising:

Obtaining one or two of the priority information and the information based on the priority cell reselection algorithm from the core network from the SIM card or through the NAS signaling;

Based on the information obtained from the core network or from the core network via NAS signaling, it is determined whether the frequency of the network needs to be searched.

9. The method of claim 1 further comprising:

And receiving, by the mobile terminal, a network that does not exist in the neighboring cell list, receiving indication information that is sent by the network, where the indication information indicates whether the mobile terminal needs to search for a frequency of the network when entering another network;

When entering the currently serving cell, it is determined whether it is necessary to search for the frequency of the network according to the last received indication in the network whether it is necessary to search for the cell of the network when entering other networks.

10. The method of claim 1, the method further comprising:

The mobile terminal controls whether it is necessary to search for the frequency of the network supported by the mobile terminal but not included in the neighbor cell list.

11. The method of claim 1 further comprising:

When the mobile terminal searches for a cell of the network, the system message of the cell is read, and parameters related to cell reselection are obtained.

12. A mobile terminal, comprising:

a searching unit, configured to search for a frequency that the mobile terminal can support but not included in the neighbor cell list when the signal strength and/or signal quality of the serving cell is lower than a set threshold P艮, and Searching for a cell of the network based on the frequency of the search;

a measuring unit, configured to measure the searched cell;

13. The mobile terminal of claim 12, further comprising:

a storage unit, configured to save frequency list information of the network, priority information of the network, and a cell with the network when leaving a network supported by the mobile terminal but not supported by the access network Select relevant parameters;

a first determining unit, configured to perform priority reselection according to information stored by the storage unit, and determine the search unit according to a priority of the network and an access network where the mobile terminal is camped on Whether to search for all frequencies in the saved frequency list information of the network.

The mobile terminal according to any one of claims 12 to 13, further comprising: a setting unit configured to set a threshold value of signal strength and/or signal quality;

a third determining unit, configured to determine whether a signal strength and/or a signal quality of the serving cell is lower than a set threshold P艮, or whether a signal strength and/or a signal quality of the serving cell and the neighboring cell in the same frequency band are Whether the signal strength and/or signal quality of the serving cell and all neighboring cells are lower than the set threshold P艮 value; and determining whether the search unit searches for the search unit according to the result of the judgment; All frequency bands of the network supported by the mobile terminal or all frequencies in the frequency list of the network saved by the mobile terminal.

15. The mobile terminal of claim 12, further comprising:

An obtaining unit, configured to: when leaving a network that is not supported by the mobile terminal but does not exist in the neighbor cell list, acquire an indication of whether a cell of the network needs to be searched when entering another network;

And a fourth determining unit, configured to determine, according to a result obtained by the obtaining unit, whether the search unit searches for a frequency of the network when entering another network.