CN104427565B - Switching processing method, access network information processing method and device - Google Patents
Switching processing method, access network information processing method and device Download PDFInfo
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Abstract
The invention discloses a switching processing method, an access network information processing method and a device, wherein the method comprises the following steps: the user equipment searches in the locally stored information and initiates switching to the access network corresponding to the access network information according to the searched access network information. The invention solves the problem caused by the too frequent inquiry of ANDSF when the user equipment is switched in the cell in the related technology, and improves the timeliness of the user equipment switching.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a handover processing method, an access network information processing method, and an access network information processing apparatus.
Background
With the widespread use of second generation (2G for short), third generation (3G) cellular wireless networks and wireless local area networks (WLAN for short) worldwide, the next generation wireless networks will be access networks with different application backgrounds, targets, development directions, system structures, coverage areas, communication protocols, link characteristics, application scenarios, service providing capabilities, and the like, and heterogeneous networks with various new access network technologies coexisting in the future due to new requirements.
In order to merge various radio access networks together to provide seamless service for users, the third generation partnership project (3 GPP for short) proposes a scheme supporting a non-3 GPP access mode to access an EPC core network at stage R8, that is, multiple radio access technologies should be supported to access a unified core network, and seamless roaming and handover between them are supported, so as to ensure service continuity. According to the division of 3GPP, the access of GSM/GPRS, WCDMA/TDSCDMA and LTE to an EPC core network is called a 3GPP access mode; the non-3 GPP access schemes mainly include access types such as IEEE802.11 (WLAN), IEEE802.16 (WiMAX), and CDMA. In order to enable the terminal to obtain related information of various Access networks (3 GPP Access Network and non-3 GPP Access Network) in advance before handover, so that the terminal can perform Network Discovery and Selection in advance to reduce handover delay, the EPC introduces an Access Network Discovery and Selection Function (ANDSF for short) in the core Network.
A trigger mechanism for discovering ANDSF by a User Equipment (UE) generally discovers ANDSF when a cell is switched by a cellular network of the UE, and queries a non-3 GPP access network in the area. However, non-3 GPP networks, especially WLANs, mostly cover urban areas with dense population, and base stations in dense population areas mainly include types with smaller coverage areas such as micro cells (microcells) and pico cells (picocells), and often there are multiple cells in the coverage area of the WLAN to which the UE desires to handover. Therefore, when the UE is switched over in a cell, the ANDSF is triggered and inquired too frequently, the possibility of untimely switching exists, and the user experience of network switching of the UE is reduced.
Aiming at the problem caused by the fact that user equipment queries ANDSF too frequently during cell switching in the related technology, a good solution is not provided at present.
Disclosure of Invention
The invention provides a handover processing method, an access network information processing method, user equipment and an access network discovery and selection function, which are used for at least solving the problem caused by the fact that the user equipment queries ANDSF too frequently during cell handover in the related technology.
According to an aspect of the present invention, there is provided a handover processing method, in which a user equipment searches for locally stored information, where the locally stored information includes: one or more access network information; and the user equipment initiates switching to the access network corresponding to the access network information according to the searched access network information.
Preferably, in a case that the locally stored information further includes the one or more access network information and a cell set mapping relationship, the searching, by the user equipment, in the locally stored information includes: and when the user equipment is switched in the cell, searching access network information corresponding to the cell set according to the cell set in which the switched source cell and/or target cell are located.
Preferably, the initiating, by the user equipment, handover to the access network according to the searched access network information includes: the user equipment scans to obtain accessible access network information; the user equipment initiates handover to the access network when the access network information is included in the accessible access network information.
Preferably, the one or more pieces of access network information are information of access networks within a geographical range to which a geographical location of the user equipment belongs.
Preferably, the user equipment obtains one or more pieces of access network information within a changed geographical range from an access network discovery and selection function ANDSF when the geographical range to which the geographical location of the user equipment belongs changes.
Preferably, the geographical range to which the geographical location of the user equipment belongs is a geographical range corresponding to the location area code LAC of the geographical location of the user equipment.
Preferably, the access network is a wireless local area network WLAN, and the access network information is an identifier of the wireless local area network.
According to another aspect of the present invention, an access network information processing method is further provided, where an access network discovery and selection function ANDSF receives a request message from a user equipment, where the request message carries identification information of a geographical range to which a geographical location of the user equipment belongs; and the ANDSF sends one or more pieces of access network information in a geographic range corresponding to the identification information to the user equipment.
Preferably, the geographical range to which the geographical location of the user equipment belongs is a geographical range corresponding to a location area code LAC of the geographical location of the user equipment, and the identification information is the LAC.
According to another aspect of the present invention, there is also provided a user equipment, including: the search module is configured to search for locally stored information, where the locally stored information includes: one or more access network information; and the initiating module is used for initiating the switching to the access network corresponding to the access network information according to the searched access network information.
Preferably, under the condition that the locally stored information further includes the mapping relationship between the one or more access network information and the cell set, the searching module is configured to search, when a cell is switched, the access network information corresponding to the cell set according to a cell set in which a source cell and/or a target cell of the switching is located.
Preferably, the initiating module is configured to scan for obtaining accessible access network information, and initiate handover to the access network when the access network information is included in the accessible access network information.
Preferably, the one or more pieces of access network information are information of access networks within a geographical range to which a geographical location of the user equipment belongs.
Preferably, the method further comprises the following steps: an obtaining module, configured to obtain, from an access network discovery and selection function ANDSF, one or more pieces of access network information within a changed geographic range when a geographic range to which a geographic location of the user equipment belongs changes.
Preferably, the geographical range to which the geographical location of the user equipment belongs is a geographical range corresponding to the location area code LAC of the geographical location of the user equipment.
Preferably, the access network is a wireless local area network WLAN, and the access network information is an identifier of the wireless local area network.
According to another aspect of the present invention, there is also provided an access network discovery and selection function, comprising: a receiving module, configured to receive a request message from a user equipment, where the request message carries identification information of a geographical range to which a geographical location of the user equipment belongs; and the sending module is used for sending one or more pieces of access network information in a geographic range corresponding to the identification information to the user equipment.
Preferably, the geographical range to which the geographical location of the user equipment belongs is a geographical range corresponding to a location area code LAC of the geographical location of the user equipment, and the identification information is the LAC.
The user equipment is adopted to search in the locally stored information by the invention, wherein the locally stored information comprises the following steps: one or more access network information; the user equipment initiates switching to the access network corresponding to the access network information according to the searched access network information, so that the problem caused by the fact that the user equipment queries ANDSF too frequently during cell switching in the related technology is solved, and the timeliness of switching of the user equipment is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a flow chart of a handover processing method according to an embodiment of the present invention;
fig. 2 is a flowchart of an access network information processing method according to an embodiment of the present invention;
fig. 3 is a block diagram of a structure of a user equipment according to an embodiment of the present invention;
fig. 4 is a block diagram of the architecture of an access network discovery and selection function according to an embodiment of the present invention;
FIG. 5 is a system architecture diagram in accordance with a preferred embodiment of the present invention;
fig. 6 is a flow chart according to a preferred embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In the following embodiments, the terminal may be a mobile terminal (e.g., a mobile phone, a tablet computer, etc.), or may be another type of terminal. The operating system running on the terminal is also various types of systems, such as an android system which is widely used at present, or a Windows operating system, an iOS system, and the like, but is not limited thereto.
In this embodiment, a handover processing method is provided, and fig. 1 is a flowchart of a handover processing method according to an embodiment of the present invention, as shown in fig. 1, the flowchart includes the following steps:
step S102, the user equipment searches in the locally stored information, wherein the locally stored information comprises: one or more access network information;
and step S104, the user equipment initiates switching to the access network corresponding to the access network information according to the searched access network information.
Through the steps, the user equipment uses the locally stored access network information, so that the user equipment does not need to acquire the access network information to the network side every time the access network information needs to be used, the communication pressure is reduced, the problem caused by the fact that the user equipment queries ANDSF too frequently during cell switching in the related technology is solved, and the timeliness of user equipment switching is improved.
Preferably, the one or more access network information may be information of access networks within a geographical range to which the geographical location of the user equipment belongs. That is, the one or more pieces of access network information stored in the ue is information of access networks within a certain geographic range, for example, the geographic range to which the geographical Location of the ue belongs is a geographic range corresponding to a Location Area Code (LAC) of the geographical Location of the ue, but is not limited thereto. Preferably, the user equipment may obtain the access network information in the changed geographical range from the access network discovery and selection function ANDSF in case that the geographical range to which the geographical location of the user equipment belongs changes (for example, when the LAC changes).
Preferably, the access network information may have a mapping relationship with the cell set, that is, the locally stored information further includes: under the condition of the mapping relation between the access network information and the cell set, at this time, when the user equipment is switched in the cell, the access network information corresponding to the cell set is searched according to the cell set in which the switched source cell and/or target cell are located. Generally, the user equipment searches for the access network information according to the cell set in which the target cell is located, but in some cases, the access network information may also be searched according to the cell set in which the source cell is located, for example, if a handover failure occurs, the user equipment needs to return to the source cell at this time, and the access network information may be searched according to the cell set in which the source cell is located at this time.
The above processing method and the preferred embodiment thereof may be applied to handover from a cellular network to a WLAN network, where the access network is a wireless local area network WLAN, and the access network information may be an identifier of the wireless local area network. Of course, it can also be applied to handover of other network types. For example, when switching to the WLAN network, the ue may scan to obtain accessible access network information; the user equipment initiates handover to the access network when the information of the access network is included in the accessible access network information.
The information stored locally by the user equipment in the processing method and the preferred embodiment thereof may be preset or may be obtained from ANDSF. In a preferred embodiment, the user equipment may obtain access network information within a changed geographical range from the access network discovery and selection function ANDSF in case that the geographical range to which the user equipment is located changes.
In this embodiment, an access network information processing method is further provided, and fig. 2 is a flowchart of an access network information processing method according to an embodiment of the present invention, as shown in fig. 2, the flowchart includes the following steps:
step S202, ANDSF receives a request message from user equipment, wherein the request message carries identification information of a geographical range of a geographical position where the user equipment is located;
step S204, the ANDSF sends one or more access network information in the geographic range corresponding to the identification information to the user equipment.
Through the steps, the access network information sent by the ANDSF to the user equipment is one or more access network information in a geographic range, so that the user equipment can not acquire the access network information from the ANDSF any more when moving in the geographic range.
Preferably, the geographical range to which the geographical location of the user equipment belongs is a geographical range corresponding to a location area code LAC of the geographical location of the user equipment, and the identification information is the LAC.
In this embodiment, a user equipment is further provided, where the user equipment is configured to implement the handover processing method and the preferred embodiment, fig. 3 is a block diagram of a structure of the user equipment according to an embodiment of the present invention, and as shown in fig. 3, the user equipment includes: a search module 32 and an initiation module 34, which are described below.
A searching module 32, configured to search in locally stored information, where the locally stored information includes: one or more access network information.
And the initiating module 34, coupled to the searching module 32, is configured to initiate a handover to an access network corresponding to the access network information according to the searched access network information.
Preferably, the information stored locally further includes: under the condition of the mapping relationship between the access network information and the cell set, the searching module 32 is configured to search, when a cell is switched, the access network information corresponding to the cell set according to the cell set in which a source cell and/or a target cell of the switching is located.
Preferably, the initiating module 34 is configured to perform scanning to obtain accessible access network information, and initiate handover to the access network when the information of the access network is included in the accessible access network information.
Preferably, the one or more pieces of access network information are information of access networks within a geographical range to which a geographical location of the user equipment belongs.
Preferably, the user equipment may further include: an obtaining module, configured to obtain, from an access network discovery and selection function ANDSF, access network information in a changed geographic range when a geographic range to which a geographic location of the user equipment belongs changes.
Preferably, the geographical range to which the geographical location of the user equipment belongs is a geographical range corresponding to the location area code LAC of the geographical location of the user equipment.
Preferably, the access network is a wireless local area network WLAN, and the access network information is an identifier of the wireless local area network.
In this embodiment, an access network discovery and selection function is further provided, where the ANDSF is used to implement the above access network information processing method and the preferred embodiment thereof, and fig. 4 is a block diagram of a structure of the access network discovery and selection function according to an embodiment of the present invention, and as shown in fig. 4, the ANDSF includes: a receiving module 42 and a transmitting module 44. The apparatus will be explained below.
A receiving module 42, configured to receive a request message from a user equipment, where the request message carries identification information of a geographic range to which a geographic location of the user equipment belongs.
A sending module 44, coupled to the receiving module 42, configured to send, to the user equipment, one or more access network information within a geographic range corresponding to the identification information.
Preferably, the geographical range to which the geographical location of the user equipment belongs is a geographical range corresponding to a location area code LAC of the geographical location of the user equipment, and the identification information is the LAC.
The following description is given with reference to preferred embodiments.
The preferred embodiment provides a method for triggering discovery of ANDSF by a UE when a cellular network LAC is handed over, and triggering a handover of the UE network from a cellular packet network to a non-3 GPP access network (especially WLAN) through a cell set and a non-3 GPP access network mapping table, so as to improve timeliness and availability of network offloading performed by the UE through the ANDSF. The method for initiating handover attachment when the UE switches to the access network in the range of the current LAC and the matched cell set information from the ANDSF when the UE switches to the preset access network (especially WLAN, WLAN is taken as an example in the preferred embodiment) is described, so as to improve the success rate of the UE switching from the cellular packet network to the WLAN.
The preferred embodiment can be implemented based on a multi-mode terminal (i.e. user equipment), and the necessary precondition is that the terminal has a wireless local area network access capability and a mobile cellular network packet domain access capability. Fig. 5 is a system architecture diagram according to a preferred embodiment of the present invention, and in conjunction with fig. 5, an Android platform dual-mode Wi-Fi terminal is taken as an example, and a session protocol processing module and a network offloading module are additionally added to the terminal to implement the preferred embodiment.
A network shunting module: the method is mainly used for searching the cell information recorded in the database module through the real-time cell information provided by the position information module, acquiring a corresponding hot spot SSID if matched cell set information is searched, triggering and starting a WLAN switch, searching the hot spot of the SSID and initiating connection switching. The network distribution module is also used for triggering the ANDSF discovery process when the real-time LAC information provided by the location information module is switched, acquiring an effective access network and cell set mapping table in the current LAC range from the ANDSF through the session protocol processing module, and recording the effective access network and cell set mapping table in the database module. The network offloading module implements the functions of the search module 32, the initiation module 34, and the acquisition module described above.
A session protocol processing module: mainly used for the secure transmission of data with the session protocol (OMA DM protocol is taken as an example in the invention) processing module of the ANDSF server. And when the network distribution module triggers the database to be updated, carrying out the safe communication of the S14 interface with the session protocol processing module of the ANDSF server.
With reference to fig. 5, the ANDSF in the preferred embodiment needs to add an information analysis module and improve the original session protocol processing module and database module to implement the functions of the preferred embodiment.
An information analysis module: mainly, according to the LAC position information uploaded by the UE, a hot spot and cell set mapping table under the current LAC position is obtained from a database module and is transmitted to a session protocol processing module.
A session protocol processing module: the session protocol processing module is mainly used for communicating with a session protocol processing module of the Wi-Fi terminal, decrypting a message uploaded by the UE, transferring the message to the information analysis module, and correspondingly packaging information acquired by the information analysis module and sending the information to the UE. The functions of the receiving module 42 and the transmitting module 44 described above are realized.
A database module: the method and the device are mainly used for storing access network information, including static AP positions and access information, and increasing cell sets and LAC information corresponding to the AP positions in the preferred embodiment.
Fig. 6 is a flowchart according to a preferred embodiment of the present invention, which is illustrated in fig. 6 by taking an Android platform dual-mode Wi-Fi terminal as an example.
Step S602, after the location information module of the UE detects that the LAC of the cellular network is switched, when querying the database that there is no matched hot spot data in the switched LAC, if there is no matched hot spot data, the ANDSF discovery process is triggered.
Step S604, the UE sends a DHCP query request to the ANDSF server to request to obtain an IP address or domain name information of the ANDSF.
Step S606, optionally, the UE acquires fqdn (full Qualified Domain name) from the DHCP server, and sends a DNS Domain name resolution request to the DNS server to acquire an IP address of the ANDSF server.
Step S608, after the UE acquires the IP address of the ANDSF, the UE establishes a secure connection with the ANDSF, and performs secure data transmission based on OMA DM through the S14 interface. The ANDSF network element is deployed in a core network of a cellular network, communicates with a terminal through an S14 interface, and assists the terminal in selecting an access network according to information such as position information reported by the terminal and user network selection preference. The S14 interface is an interface implemented above the IP layer and OMA-DM is the recommended implementation, which requires both the network side and the terminal side to support the OMA-DM protocol. The terminal has two ways to obtain the policy from the ANDSF: push mode (ANDSF initiates policy update actively) and pull mode (UE initiates a request to the network side to update the policy).
Step S610, the ANDSF responds to the request of the UE, returns information of an available access network (WLAN hotspot and corresponding cell set (CellID 1, CellID2, CellID3 …) mapping table) in the LAC coverage area of the UE according to the current location information of the UE, and maps information of multiple cells with a single hotspot SSID (service set identifier) to improve the probability of triggering offloading.
Step S612, when the UE switches the cells in the LAC coverage area, the UE searches in the hot cell set mapping table, and obtains the corresponding hot information SSID1 if the matched record is searched.
Step S614, the UE starts a local WLAN switch, initiates hotspot scanning, acquires an SSID list at the current position, and jumps to step S620 if the hotspot SSID1 exists.
In step S616, if there is no matched hotspot SSID1 in the WLAN list, the Wi-Fi switch is turned off, and time delay is performed, and when the time t reaches the time t, the attempt is made again, and the process goes to step S614.
Step S618, optionally, if cell switching occurs during the delay, the delay is stopped, and step S612 is skipped.
Step S620, the Wi-Fi initiates the operation of connecting with the SSID1, the shunt switching is carried out after the connection is successful, and the data traffic is shunted from the cellular network to the WLAN link.
After the above process is completed, by adding the hot spot and the cell set mapping table, the UE completes the shunting from the cellular network to the WLAN through the ANDSF in the dense cell area, thereby achieving the purpose of assisting the UE to automatically shunt to the WLAN.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and they may alternatively be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, or fabricated separately as individual integrated circuit modules, or fabricated as a single integrated circuit module from multiple modules or steps. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A handover processing method, comprising:
the user equipment searches in locally stored information, wherein the locally stored information comprises: one or more access network information, the one or more access network information being information of access networks within a geographical range to which a geographical location of the user equipment belongs;
the user equipment initiates switching to an access network corresponding to the access network information according to the searched access network information, wherein when the user equipment moves within the geographic range, the user equipment does not acquire the information of the access network from an access network discovery and selection function ANDSF;
the geographical range of the geographical position of the user equipment is a geographical range corresponding to a location area code LAC of the geographical position of the user equipment;
in a case that the locally stored information further includes the one or more access network information and a cell set mapping relationship, the searching, by the user equipment, in the locally stored information includes: and when the user equipment is switched in the cell, searching access network information corresponding to the cell set according to the cell set in which the switched source cell and/or target cell are located.
2. The method of claim 1, wherein the user equipment initiating handover to the access network according to the searched access network information comprises:
the user equipment scans to obtain accessible access network information;
the user equipment initiates handover to the access network when the access network information is included in the accessible access network information.
3. The method of claim 1, further comprising:
and the user equipment acquires one or more access network information in the changed geographical range from the ANDSF under the condition that the geographical range of the geographical position of the user equipment is changed.
4. The method according to claim 1 or 2, wherein the access network is a wireless local area network, WLAN, and the access network information is an identifier of the wireless local area network.
5. An access network information processing method is characterized by comprising the following steps:
an access network discovery and selection function ANDSF receives a request message from user equipment, wherein the request message carries identification information of a geographical range of a geographical position where the user equipment is located;
the ANDSF sends one or more pieces of access network information in a geographic range corresponding to the identification information to the user equipment to indicate the user equipment to store the one or more pieces of access network information in a local area, searches the locally stored access network information when switching processing is needed, and initiates switching to an access network corresponding to the access network information according to the searched access network information; when the user equipment moves within the geographic range, the user equipment does not acquire the information of the access network from the ANDSF any more;
the geographical range of the geographical position of the user equipment is a geographical range corresponding to a location area code LAC of the geographical position of the user equipment;
in a case that the locally stored access network information further includes the one or more access network information and a cell set mapping relationship, the searching, by the user equipment, from the locally stored access network information includes: and when the user equipment is switched in the cell, searching access network information corresponding to the cell set according to the cell set in which the switched source cell and/or target cell are located.
6. The method of claim 5, wherein the identification information is the LAC.
7. A user equipment, comprising:
the search module is configured to search for locally stored information, where the locally stored information includes: one or more access network information, the one or more access network information being information of access networks within a geographical range to which a geographical location of the user equipment belongs;
the initiating module is used for initiating the switching to the access network corresponding to the access network information according to the searched access network information, wherein when the user equipment moves within the geographic range, the ANDSF function is not found and selected from the access network to acquire the information of the access network;
the geographical range of the geographical position of the user equipment is a geographical range corresponding to a location area code LAC of the geographical position of the user equipment;
and under the condition that the locally stored information further includes the mapping relationship between the one or more access network information and the cell set, the searching module is configured to search, when a cell is switched, the access network information corresponding to the cell set according to the cell set in which a source cell and/or a target cell to be switched are located.
8. The UE of claim 7, wherein the initiating module is configured to scan for accessible access network information and initiate handover to the access network when the information about the access network is included in the accessible access network information.
9. The UE of claim 7, further comprising:
an obtaining module, configured to obtain, from the ANDSF, information of one or more access networks in a changed geographic range when a geographic range to which a geographic location of the user equipment belongs changes.
10. The UE of claim 7 or 8, wherein the access network is a WLAN, and wherein the access network information is an identifier of the WLAN.
11. An access network discovery and selection function, comprising:
a receiving module, configured to receive a request message from a user equipment, where the request message carries identification information of a geographical range to which a geographical location of the user equipment belongs;
a sending module, configured to send, to the user equipment, one or more pieces of access network information within a geographic range corresponding to the identification information, so as to instruct the user equipment to store the one or more pieces of access network information locally, and when handover processing needs to be performed, search from the locally stored access network information, and initiate access network handover to the access network corresponding to the access network information according to the searched access network information; when the user equipment moves within the geographic range, the user equipment does not acquire the information of the access network from the access network discovery and selection function any more;
the geographical range of the geographical position of the user equipment is a geographical range corresponding to a location area code LAC of the geographical position of the user equipment;
in a case that the locally stored access network information further includes the one or more access network information and a cell set mapping relationship, the searching, by the user equipment, from the locally stored access network information includes: and when the user equipment is switched in the cell, searching access network information corresponding to the cell set according to the cell set in which the switched source cell and/or target cell are located.
12. The access network discovery and selection function of claim 11 wherein said identification information is said LAC.
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| CN201310383502.2A CN104427565B (en) | 2013-08-28 | 2013-08-28 | Switching processing method, access network information processing method and device |
| PCT/CN2013/084235 WO2014169578A1 (en) | 2013-08-28 | 2013-09-25 | Handover processing method, and access network information processing method and device |
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| CN201310383502.2A CN104427565B (en) | 2013-08-28 | 2013-08-28 | Switching processing method, access network information processing method and device |
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| KR20160048651A (en) * | 2014-10-24 | 2016-05-04 | 삼성전자주식회사 | Method and appratus of interworking with wlan networks according to the type of camping cell |
| WO2017113529A1 (en) * | 2015-12-31 | 2017-07-06 | 华为技术有限公司 | Mobility management method, user equipment, and base station |
| CN108702662B (en) * | 2016-02-18 | 2021-01-19 | 信实资讯通信公司 | System and method for performing handover in heterogeneous network |
| WO2020034978A1 (en) * | 2018-08-14 | 2020-02-20 | Oppo广东移动通信有限公司 | Communication method, terminal device and network device |
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| CN103260171A (en) * | 2012-02-20 | 2013-08-21 | 华为技术有限公司 | Method and terminal of area measurement and reselection |
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| CN101729326B (en) * | 2008-10-21 | 2013-01-16 | 中兴通讯股份有限公司 | Automatic configuration server selection method and system, domain name system and home gateway |
| CN101729328B (en) * | 2008-10-27 | 2012-04-04 | 中兴通讯股份有限公司 | Auto-configuration server redirection method and auto-configuration server |
| CN101998365B (en) * | 2009-08-14 | 2014-12-10 | 中兴通讯股份有限公司 | Method and device for source management of communication system supporting local IP access |
| CN102045811A (en) * | 2009-10-12 | 2011-05-04 | 中兴通讯股份有限公司 | Access network information acquisition method, access network finding and selecting functional unit and terminal |
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| CN101568162A (en) * | 2008-04-25 | 2009-10-28 | 华为技术有限公司 | Method and device for reselecting access network and user equipment |
| CN101730192A (en) * | 2009-02-10 | 2010-06-09 | 中兴通讯股份有限公司 | Method and device for transmitting access network policy information and interaction system |
| CN103260171A (en) * | 2012-02-20 | 2013-08-21 | 华为技术有限公司 | Method and terminal of area measurement and reselection |
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