CN104969622B - A kind of switching method, base station and terminal - Google Patents
A kind of switching method, base station and terminal Download PDFInfo
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- CN104969622B CN104969622B CN201380002674.9A CN201380002674A CN104969622B CN 104969622 B CN104969622 B CN 104969622B CN 201380002674 A CN201380002674 A CN 201380002674A CN 104969622 B CN104969622 B CN 104969622B
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/18—Selecting a network or a communication service
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/20—Selecting an access point
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Abstract
The invention discloses a kind of switching method, base station and terminals.Wherein, method includes: that base station instruction terminal opens access network discovery and selection function ANDSF, obtains access network information by the ANDSF for the terminal, the access network information includes candidate target access network information；The base station receives the candidate target access network information that the terminal is sent；Target access network is determined according to the candidate target access network information with the base station, and the terminal is switched into the target access network.According to the technical solution, control of the base station to terminal is realized, the controllability of terminal is improved.
Description
Technical field
The present invention relates to technical field of access networks more particularly to a kind of switching methods, base station and terminal.
Background technique
With the development of mobile internet, the requirement of the service quality and network speed that cellular communication system are capable of providing
It is higher and higher.But the data traffic of explosive growth causes serious network blockage, for this purpose, at present using a variety of access nets
Mode shunts cellular data.Such as LTE(Long Term Evolution, long term evolution) and WLAN(Wireless
Local Area Networks, WLAN).
Rationally to utilize network side resource, guarantees the business experience of user, a suitable access net is selected to seem especially
It is important, but in the prior art, there is no the selection mechanisms of an effective access net.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of switching method, base station and terminal, realize that terminal is cut internetwork
It changes.The technical solution adopted by the present invention is that:
In a first aspect, the present invention provides a kind of switching methods, which comprises
Base station instruction terminal opens access network discovery and selection function ANDSF, is obtained for the terminal by the ANDSF
Access network information is taken, the access network information includes candidate target access network information；
The base station receives the candidate target access network information that the terminal is sent；With
The base station determines target access network according to the candidate target access network information, and the terminal is switched to institute
State target access network.
In the first possible implementation of the first aspect, the base station instruction terminal opens ANDSF, specific to wrap
It includes:
The base station sends instruction message to the terminal, and the instruction message is used to indicate whether the terminal opens institute
State ANDSF；
The base station indicates that the terminal opens the ANDSF by the instruction message.
With reference to first aspect or the first possible implementation of first aspect, second in first aspect are possible
Implementation in, further includes:
The base station is determined according to following at least one situation indicates that the terminal opens the ANDSF:
The load capacity of the base station is greater than the first pre-determined threshold or the movement speed of the terminal is lower than the second pre-determined threshold；
The base station determines the closed state for indicating that the terminal keeps the ANDSF according to following at least one situation:
There is no the movement speeds of changeable access net or the terminal to be higher than third pre-determined threshold for the base station confirmation.
The possible implementation of second with reference to first aspect, in the third possible implementation, further includes:
The base station receives the ANDSF information that core net is sent；
The base station further confirms that whether indicate that the terminal opens the ANDSF according to the ANDSF information.
With reference to first aspect or the first possible implementation of first aspect, in the 4th kind of possibility of first aspect
Implementation in, further includes:
The base station receives the request that the terminal is sent, and the request is for requesting the base station to indicate that the terminal is opened
Open the ANDSF.
With reference to first aspect or first to fourth kind of possible implementation of first aspect, in the 5th kind of possible reality
In existing mode, when the base station and the target access network are the base station of 3GPP network, in handoff procedure, the base station
Following at least one is also sent to the target access network:
The instruction message；
The ANDSF information.
Second aspect, the present invention provides a kind of base stations, comprising:
Indicating unit is used to indicate terminal and opens access network discovery and selection function ANDSF, passes through institute for the terminal
It states ANDSF and obtains access network information, the access network information includes candidate target access network information；
Receiving unit, the candidate target access network information sent for receiving the terminal；With
Switch unit for determining target access network according to the candidate target access network information, and the terminal is cut
Shift to the target access network.
In the first possible implementation of the second aspect, further includes:
Transmission unit, for sending instruction message to the terminal, whether the instruction message is used to indicate the terminal
Open the ANDSF.
In conjunction with the possible implementation of the first of second aspect or second aspect, second in second aspect may
Implementation in, further includes:
Processing unit indicates that the terminal opens the ANDSF for determining according to following at least one situation:
The load capacity of base station is greater than the first pre-determined threshold or the movement speed of the terminal is lower than the second pre-determined threshold；Or
For determining the closed state for indicating that the terminal keeps the ANDSF according to following at least one situation:
There is no the movement speeds of changeable access net or the terminal to be higher than third pre-determined threshold for confirmation.
In conjunction with second of possible implementation of second aspect, in the third possible implementation of second aspect
In,
The receiving unit is also used to receive the ANDSF information of core net transmission；
The processing unit is also used to further confirm that whether indicate described in the terminal unlatching according to ANDSF information
ANDSF。
In conjunction with the possible implementation of the first of second aspect or second aspect, in the 4th kind of possibility of second aspect
Implementation in,
The receiving unit is also used to receive the request that the terminal is sent, and the request is for requesting the instruction single
Member indicates that the terminal opens the ANDSF.
In conjunction with first to fourth kind of possible implementation of second aspect or second aspect, the 5th of second aspect the
In the possible implementation of kind,
When the base station and the target access network are in 3GPP network, in handoff procedure, the transmission is single
Member is also used to following at least one being sent to the target access network:
The instruction message；
The ANDSF information.
The third aspect, the present invention provides a kind of switching methods, comprising:
Terminal opens access network discovery and selection function ANDSF according to the instruction of base station；
Terminal obtains access network information by the ANDSF, and the access network information includes candidate target access network information；
The terminal sends the candidate target access network information to the base station；
The terminal switches to base station target access network according to determined by the candidate target access network information.
In the first possible implementation of the third aspect, terminal according to the instruction of base station open access network discovery and
Selection function ANDSF, specifically includes:
The terminal receives the instruction message that the base station is sent, and the instruction message is used to indicate whether the terminal is opened
Open ANDSF；
The terminal opens the ANDSF according to the instruction message.
In conjunction with the possible implementation of the first of the third aspect or the third aspect, second in the third aspect may
Implementation in, further includes:
The terminal sends a request to the base station, wherein the request is for requesting the base station to indicate the terminal
Open the ANDSF.
In conjunction with the first to second possible implementation of the third aspect or second aspect, in the third of the third aspect
In the possible implementation of kind, when the movement speed that the load capacity of the base station is greater than the first pre-determined threshold or the terminal is lower than
When the second pre-determined threshold, the instruction message is used to indicate the terminal and opens the ANDSF;
When there is no the changeable target access networks or the screen of the terminal to be higher than for base station confirmation
When three pre-determined thresholds, the instruction message is used to indicate the closed state that the terminal keeps the ANDSF.
In conjunction with the third possible implementation of the third aspect, in the 4th kind of possible implementation of the third aspect
In, the instruction message is that the base station is generated according to the ANDSF information that core net is sent.
Fourth aspect, the present invention provide a kind of terminal, comprising:
Opening unit, for opening access network discovery and selection function ANDSF according to the instruction of base station；
Acquiring unit, for obtaining access network information by the ANDSF, the access network information includes that candidate target connects
Inbound information；
Transmission unit, for sending the candidate target access network information to the base station；
Switch unit accesses the determining target access network of net according to the candidate target for switching to the base station.
In the first possible implementation of the fourth aspect, further includes:
Receiving unit, the instruction message sent for receiving the base station, the instruction message are used to indicate the terminal
Whether ANDSF is opened.
In conjunction with the possible implementation of the first of fourth aspect or fourth aspect, second in fourth aspect may
Implementation in, the transmission unit is also used to send a request to the base station, wherein the request is described for requesting
Base station indicates that the terminal opens the ANDSF.
In conjunction with the first to second possible implementation of fourth aspect or fourth aspect, in the third of fourth aspect
In the possible implementation of kind, when the movement speed that the load capacity of the base station is greater than the first pre-determined threshold or the terminal is lower than
When the second pre-determined threshold, the instruction message is used to indicate the terminal and opens the ANDSF；
When there is no the screens of changeable access net or the terminal to be higher than the pre- gating of third for base station confirmation
In limited time, the instruction message is used to indicate the closed state that the terminal keeps the ANDSF.
In conjunction with the third possible implementation of fourth aspect, in the 4th kind of possible implementation of fourth aspect
In, the instruction message is that the base station is generated according to the ANDSF information that core net is sent.
At least one above-mentioned technical solution provided through the embodiment of the present invention, so that terminal only allows it to open in base station
When opening network discovery function just corresponding network is scanned, compared with the prior art in, realize control of the base station to terminal,
Improve the controllability of terminal.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by written explanation
Specifically noted structure is achieved and obtained in book, claims and attached drawing.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application can also be obtained according to these attached drawings other for those of ordinary skill in the art
Attached drawing.
Fig. 1 is one base station side method flow diagram of the embodiment of the present invention；
Fig. 2 is two base station structure diagram of the embodiment of the present invention；
Fig. 3 is three terminal side method flow diagram of the embodiment of the present invention；
Fig. 4 is four terminal structure figure of the embodiment of the present invention；
Fig. 5 is the hardware structural diagram of base station of the embodiment of the present invention；
Fig. 6 is the hardware structural diagram of the terminal of that embodiment of the invention.
Fig. 7 is the hardware structural diagram of switching system of the embodiment of the present invention.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, with reference to the accompanying drawing with embodiment to this
Inventive embodiments are described in further detail.
Core of the invention thought is, opens access network discovery and selection function (Access by base station instruction terminal
Network Discovery and Selection Function, ANDSF), make terminal under the control of base station to corresponding
Access net is scanned, and determines the terminal target access network to be switched by base station.Compared with the prior art, the present invention realizes
Control of the base station to terminal, improves the controllability of terminal.
ANDSF is the concept that core net introduces, including data management and control function.In embodiments of the present invention, work as end
When ANDSF is opened at end, network can be scanned according to the ANDSF information obtained from core net and obtain available access net letter
Breath.ANDSF information includes:
1) inter-system mobility strategy
Inter-system mobility strategy is the rule and preference that one group of operator defines, and the mobility that it can be influenced between system is determined
Plan.Specifically, inter-system mobility strategy may include following at least one:
A) priority between system, as the priority of LTE is higher than WLAN.
B) in system heterogeneous networks priority, if WLAN SSID-1 is prior to WLAN SSID-2.
C) whether the mobility between system allows, such as whether allowing the switching from LTE to WLAN, or under certain condition
Allow the switching from LTE to WLAN.
D) effective condition, that is, indicate the effective condition of inter-system mobility strategy, for example, the effective time and
Place.
2) access network discovery information
When UE request network selection, ANDSF information is capable of providing one group of periphery UE and effectively accesses network list, the column
Table includes various access network technologies.Effective access technology information includes access technology type (such as WLAN, WiMAX) and wirelessly
Access network.Identifier (SSID of such as WLAN).In addition, there are also the specifying information of other technologies, such as one or more carrier frequency；About
The access network information when beam condition, such as some condition identities provide is effective.UE should retain and be provided using these ANDSF
Access network information is until receiving more new information next time.
3) routing policy between system
ANDSF may provide routing iinformation between system, i.e. different business can be in different system access.UE can be according to the plan
Slightly, by the different system access of different service selections.Such as one or more filtering rules, i.e., it is each identify a kind of business or
The rule of the priority system of APN connection.
Existing ANDSF information is mainly that operator is fixed in core net according to the signing information and historical statistical information of user
Justice, access network information is considered there is no accurate in the information, the true and reliable of access network information is not ensured that, so user
Equipment needs to be scanned in advance, to obtain the information of available access network when using ANDSF.It should be noted that of the invention
Involved in terminal refer to can be with the terminals, such as smart phone, smart electronics arrangement for reading etc. of multiple access net connections.Its
In, access net can be 3G network, such as LTE network, be also possible to non-3G network, such as WLAN WLAN.Referring to Fig. 1,
For a kind of switching method that the embodiment of the present invention one provides, this method is specifically included:
S11, base station instruction terminal open access network discovery and selection function ANDSF.
In the present invention, terminal is only in the instruction for opening access network discovery and selection function for receiving base station, just meeting
Network sweep is carried out to obtain access network information.The terminal obtains access network information, the access network information by the ANDSF
Including candidate target access network information.Wherein, scan in the access network information of acquisition include can be used for it is subsequent switch over connect
Inbound information, that is, candidate target access network information.
Base station is used to indicate whether terminal opens the instruction message of ANDSF come instruction terminal unlatching by sending in the present invention
ANDSF.In the present invention, base station can send instruction message to terminal by the following two kinds mode:
Mode one: whether base station broadcast opens the system message of ANDSF to instruction terminal.As base station can broadcast a cloth
Its value is set as " ture ", is not allowing terminal to open by the instruction of your (Boolean) type when allowing terminal to open ANDSF
When ANDSF, its value is set as " flase ".
Mode two: base station receives the request for being used to that base station instruction terminal to be requested to open ANDSF that terminal is sent.
Base station sends instruction message to terminal according to above-mentioned request.
Wherein, terminal can send above-mentioned ask by radio resource control (Radio Resource Control, RRC)
It asks, corresponding base station can send the instruction for allowing terminal to open ANDSF by RRC information.
Specifically, base station can indicate the instruction of a Boolean type in RRC information, terminal is being allowed to open ANDSF
When, its value is set as " ture ", when not allowing terminal to open ANDSF, its value is set as " flase ".
S12, the base station receive the candidate target access network information that the terminal is sent.
Terminal opens ANDSF according to the instruction of base station, carries out network sweep and obtains access network information, and will be qualified
Access net is determined as candidate target access net.
Above-mentioned candidate target access network information includes at least the network name of candidate target access net.
Optionally, candidate target access network information also may include the access of each candidate target net corresponding signal quality and/or
The priority and/or terminal of each candidate target access net determine the carrying information such as load identification for being switched to candidate target access net
(DRB ID).
S13, the base station determine target access network according to the candidate target access network information, and the terminal is switched
To the target access network.
Base station can determine target access network according to the signal quality in candidate target access network information, such as selection signal quality
Best is target access network.
Base station can also determine target access network according to the priority in candidate target access network information, such as determine priority most
High is target access network.
Base station can also determine target access network according to above-mentioned DRB ID, such as according to the service quality (Quality of the DRB
Of Service, QoS) parameter judges the amount of bandwidth that the DRB needs, then determined according to required amount of bandwidth have it is corresponding
The network of bandwidth is target access network.Such as when required bandwidth is larger, the lighter network of network load may be selected and connect for target
It networks.
Certain base station can be combined with above-mentioned many factors and determine target access network, as base station determination meets preset signal
The access net of highest priority is target access network in the access net of quality.
After base station determines target access network, switching command can be transmitted to terminal, target access network is switched to instruction terminal.
Network name in switching command including at least target access network also may include optionally the DRB for being switched to the target access network
Information.
Certainly, base station can also access the information netted by candidate target based on the received in the present invention, determine not instruction terminal
Handover network.When determining not instruction terminal switching access networks, base station can not send any order, and not switching command also can be transmitted
To terminal.
In above-described embodiment one, base station instruction terminal open ANDSF, the present invention in base station can determine in several ways be
No permission terminal opens ANDSF, and two of them will be introduced below:
Mode one: base station decides whether that terminal is allowed to open ANDSF according to local policy.
Specifically, base station can determine that instruction terminal opens ANDSF according to following at least one situation:
The load capacity of base station is greater than the first pre-determined threshold or the movement speed of terminal is lower than the second pre-determined threshold.
Such as, be more than the first pre-determined threshold when base station detects that the side the LTE network load being currently accessed is overweight, need by
Subnetwork load balancing is to other networks, and base station allows terminal to open ANDSF at this time.
For another example, the movement speed that terminal is known in base station can carry out network switching, base station can at this time lower than the second pre-determined threshold
Terminal is allowed to open ANDSF.
Base station can determine that instruction terminal keeps the closed state of ANDSF according to following at least one situation:
There is no the movement speeds of changeable access net or terminal to be higher than third pre-determined threshold for base station confirmation.
Such as when base station detects that terminal is switched over without available access net there is currently no when changeable access net,
At this point, base station can instruction terminal keep ANDSF closed state.
For another example base station detects that moving velocity of terminal is too fast, is higher than third pre-determined threshold, can be detached from a short time current
The coverage area of network, then base station can instruction terminal keep ANDSF closed state.
Mode two: base station determines whether that terminal opens ANDSF in combination with local policy and ANDSF information.
Base station obtains ANDSF information from core net first.
Then base station combines above-mentioned local policy and ANDSF information to decide whether that terminal is allowed to open ANDSF.
If base station detects the position (such as longitude and latitude) for entering the information of the access network discovery in ANDSF information and indicating,
Or base station is detected into the access network of network title (cell of such as LTE indicated in access network discovery information in ANDSF
ID), and meet above-mentioned local policy, as base station knows that the side the LTE network load that is currently accessed is overweight and/or the mobile speed of terminal
When degree is lower than the second predetermined threshold value, base station allows terminal to open ANDSF.
In alternative embodiment of the present invention, base station can in instruction message simultaneously the scan period is set, so as to terminal according to
The scan period is scanned, and saves terminal electricity consumption.
In another alternative embodiment of the present invention, it is successful that also access network discovery can be arranged simultaneously in instruction message in base station
Condition, so that the access net for meeting the condition is determined as candidate target access net by terminal.By this way, it further improves
Control of the base station to terminal selection target access net.
It should be noted that in a preferred embodiment, base station can also pass through the Idle state mobility strategy of oneself definition
Network discovery control message is issued to terminal.Idle state mobility strategy refers to which kind of is accessed when terminal is in idle condition connects
The strategy of networking.For example the priority of LTE network is defined higher than wlan network.In the present invention, when the terminal being in idle condition
Being determined according to network discovery control message can access when not allowing opening network discovery feature according to Idle state mobility strategy
Corresponding access net.Opening network is allowed to find function when the terminal being in idle condition is determined according to network discovery control message
Idle state mobility strategy can be ignored when energy, access net accordingly according to infomation detections such as ANDSF.
When terminal carries out network switching, corresponding base station is also switched over.If above-mentioned base station and target access network
When base station is the base station of 3GPP network, in handoff procedure, base station also by above-mentioned instruction message, ANDSF information at least
A kind of base station being sent to target access network.So that the base station of target access network can do next step wireless resource management accordingly
(Radio Resource Management, RRM) strategy, and which is also beneficial to save and is spaced apart spending.
The corresponding above method, second embodiment of the present invention provides a kind of base stations, and referring to fig. 2, which includes:
Indicating unit 11 is used to indicate terminal and opens access network discovery and selection function ANDSF, passes through for the terminal
The ANDSF obtains access network information, and the access network information includes candidate target access network information；
Receiving unit 12, the candidate target access network information sent for receiving the terminal；
Switch unit 13, for determining target access network according to the candidate target access network information, and by the terminal
Switch to the target access network.
Terminal opens ANDSF according to above-mentioned instruction, carries out network sweep and obtains access network information, and connects qualified
Networking is determined as candidate target access net.
Above-mentioned candidate target access network information includes at least the network name of candidate target access net.
Optionally, candidate target access network information also may include the access of each candidate target net corresponding signal quality and/or
The priority and/or terminal of each candidate target access net determine the carrying information such as load identification for being switched to candidate target access net
(DRB ID).
Switch unit can determine target access network, such as selection signal according to the signal quality in candidate target access network information
Top-quality is target access network.
Switch unit can also determine target access network according to the priority in candidate target access network information, such as determine preferential
Highest grade is target access network.
Switch unit can also determine target access network according to above-mentioned DRB ID, such as according to the service quality of the DRB
(Quality of Service, QoS) parameter judges the amount of bandwidth that the DRB needs, then true according to required amount of bandwidth
Surely the network with respective bandwidth is target access network.Such as when required bandwidth is larger, the lighter net of network load may be selected
Network is target access network.
Below it is that a kind of specific implementation of target access network is determined according to above-mentioned DRB ID:
Traffic flow template (TFT, the Traffic Flow of the type for the business A that terminal will be transmitted such as business A
Template) it is reported to base station.Base station obtains the traffic flow template and DRB mapping relations of business A from core net MME in advance, such as
It is carried in foundation/modification process accordingly in A business, the traffic flow template of A business is handed down to base station by MME.Base station is according to end
It holds the service quality QoS parameter of the traffic flow template reported mark to judge the bandwidth that business A needs, there is corresponding band with selection
Wide access net is target access network.
Certain switch unit can be combined with above-mentioned many factors and determine target access network, as determination meets preset signal
The access net of highest priority is target access network in the access net of quality.
After switch unit determines target access network, switching command can be transmitted to terminal, target is switched to instruction terminal and is connect
It networks.Network name in switching command including at least target access network also may include optionally being switched to the target access network
DRB information.
In above-described embodiment, indicating unit instruction terminal opens ANDSF, and corresponding, base station further includes processing unit, is used for
Decide whether that terminal is allowed to open ANDSF.
In alternative embodiment of the present invention, processing unit is used to be decided whether according to local policy that terminal to be allowed to open
ANDSF:
Specifically, processing unit, which is used to be determined according to following at least one situation, indicates that the terminal opens the ANDSF:
The load capacity of base station is greater than the first pre-determined threshold or the movement speed of the terminal is lower than the second pre-determined threshold.Such as,
When detecting that the side the LTE network load being currently accessed is overweight, it has been more than the first pre-determined threshold, has needed subnetwork load balancing
To other networks, processing unit allows terminal to open ANDSF at this time.
For another example, detect that the movement speed of terminal lower than the second pre-determined threshold, can carry out network switching, at this time processing unit
Terminal is allowed to open ANDSF.
Processing unit is also used to determine the closing for indicating that the terminal keeps the ANDSF according to following at least one situation
State:
There is no the movement speeds of changeable access net or the terminal to be higher than third pre-determined threshold for confirmation.Such as work as detection
To there is currently no when changeable access net, terminal is switched over without available access net, at this point, processing unit determines instruction
The closed state of terminal holding ANDSF.
It for another example detects that moving velocity of terminal is too fast, is higher than third pre-determined threshold, current network can be detached from a short time
Coverage area, then processing unit can determine instruction terminal keep ANDSF closed state.
In alternative embodiment of the present invention, receiving unit is specifically used for obtaining ANDSF information, processing unit from core net
For combining local policy and ANDSF information to decide whether that terminal is allowed to open ANDSF:
Such as detect the position (such as longitude and latitude) for entering the instruction of the information of the access network discovery in ANDSF information, or
It detects and enters access network of network title (such as cell ID of LTE) indicated in access network discovery information in ANDSF, and accord with
It closes and states local policy, such as know that the side the LTE network load being currently accessed is overweight and/or the movement speed of terminal is pre- lower than second
Gating limit value.
In an alternative embodiment, above-mentioned base station may also include transmission unit, for sending instruction message to terminal, with instruction
Whether terminal opens ANDSF.
The transmission unit can be specifically used for the system message whether broadcast opens ANDSF to instruction terminal.It can such as broadcast
Its value is set as " ture ", is not allowing end by the instruction of one boolean (Boolean) type when allowing terminal to open ANDSF
When ANDSF is opened at end, its value is set as " flase ".
Or the request transmission instruction that above-mentioned transmission unit can be specifically used for being sent according to the received terminal of receiving unit disappears
Breath to terminal, above-mentioned request opens ANDSF for terminal request indicating unit instruction terminal.
Terminal can send above-mentioned request extremely by radio resource control (Radio Resource Control, RRC)
Receiving unit, corresponding transmission unit can send the instruction message for allowing terminal to open ANDSF by RRC information.Specifically, hair
Its value is set as by the instruction for sending unit that can indicate a Boolean type in RRC information when allowing terminal to open ANDSF
Its value is set as " flase " when not allowing terminal to open ANDSF by " ture ".
In alternative embodiment of the present invention, the scan period can be arranged simultaneously in instruction message in indicating unit, so as to terminal
It is scanned according to the scan period, saves terminal electricity consumption.
In another alternative embodiment of the present invention, indicating unit can also be arranged simultaneously in instruction message access network discovery at
The condition of function, so that the access net for meeting the condition is determined as candidate target access net by terminal.By this way, it further mentions
High control of the base station to terminal selection target access net.
When terminal carries out network switching, corresponding base station is also switched over.If above-mentioned base station and target access network
When base station is the base station of 3GPP network, in handoff procedure, above-mentioned transmission unit is also used to instruction message, ANDSF information
At least one of be sent to the base station of target access network, so that the base station of target access network can do wireless money in next step accordingly
Source control (Radio Resource Management, RRM) strategy, and which is also beneficial to save and is spaced apart spending.
The embodiment of the present invention three additionally provides a kind of switching method, referring to Fig. 3, this method comprises:
S21, terminal open access network discovery and selection function ANDSF according to the instruction of base station.
In the present invention, the instruction message that terminal can be sent according to base station opens ANDSF.
As terminal can based on the received base station broadcast system message open ANDSF.Specifically, terminal receives and reads base
Stand broadcast system message, then determine whether open ANDSF.If receiving the instruction of a Boolean type,
Value is " ture ", then judgement allows to open ANDSF, if the value of Boolean type instruction is " false ", judges not allow
Open ANDSF.
Terminal can also send the request that ANDSF is opened in request to base station, as terminal meets connecing for preset condition detecting
When networking.Above-mentioned request is sent to base station.Specifically, terminal can send above-mentioned request to base station by RRC information.Base station according to
Above-mentioned request returns to instruction message, which can be sent by RRC information.Terminal receives the RRC information, then judges
Whether allow to open ANDSF.If receiving the instruction of a Boolean type, value is " ture ", then judgement allows to open
ANDSF judges not allow to open ANDSF if the value of Boolean type instruction is " false ".
Wherein, above-mentioned instruction message can be what base station was generated according to local policy, is also possible to base station and combines local plan
What the ANDSF information slightly and from core net obtained generated.For details, reference can be made to the discussions of embodiment one.
S22, terminal obtain access network information by the ANDSF, and the access network information includes candidate target access net
Information.
If terminal, which determines, opens ANDSF, start network sweep, obtains access network information.
In the present invention, terminal can obtain ANDSF information from core net, then carry out network sweep according to ANDSF information.Tool
Body, terminal can obtain ANDSF information in such a way that application layer using terminal is requested, and can also be obtained by network-triggered
ANDSF。
Terminal can according in ANDSF information inter-system mobility strategy and access network discovery information it is corresponding to detect
Network, network site and network name such as terminal according to the access network discovery information in ANDSF information, in place
Network discovery function is opened, network sweep is carried out；For another example terminal can be high to policy priority scan priority according to moving between system
Network.
It should be noted that if in the instruction that base station issues at the same include network sweep period, terminal can be according to
The period carries out network sweep.Compared with the prior art, which saves terminal electricity consumption.
S23, the terminal send the candidate target access network information to the base station.
The access net for meeting certain condition is determined as candidate target access net by terminal, as terminal will meet ANDSF information
Access net be determined as candidate target access net.
In alternative embodiment of the invention, base station can issue the successful condition of network discovery such as access net signal simultaneously and refer to
For the thresholding of order to terminal, terminal can further combine the condition, and the access net for meeting the successful condition of the network discovery is true
It is set to target access network.
Above-mentioned candidate target access network information includes at least the network name of candidate target access net.
Optionally, candidate target access network information also may include the access of each candidate target net corresponding signal quality and/or
The priority and/or terminal of each candidate target access net determine the carrying information such as load identification for being switched to candidate target access net
(DRB ID).
In the present invention, candidate target access network information can be reported to base station by RRC information by terminal.
S24, the terminal switch to the access of base station target according to determined by the candidate target access network information
Net.
Base station determines target access network according to candidate target access network information, and issues switching command to terminal, and terminal can
Target access network is switched to accordingly.
It should be noted that in the present invention, when terminal does not receive any order of base station transmission, can default not into
Row network switching.
In the present invention, base station can also send cell reselection priority information to terminal.When terminal is in idle condition
(IDLE) when, terminal can ignore the cell reselection priority information that base station issues, or will move between the system of ANDSF information
The priority of property strategy is set as highest.
For the above method, the embodiment of the present invention four provides a kind of terminal, and referring to fig. 4, which includes:
Opening unit 21, for opening access network discovery and selection function ANDSF according to the instruction of base station；
Acquiring unit 22, for obtaining access network information by the ANDSF, the access network information includes candidate target
Access network information；
Transmission unit 23, for sending the candidate target access network information to the base station.
Switch unit 24 accesses the determining target access network of net according to the candidate target for switching to the base station.
Above-mentioned acquiring unit can obtain access network information by carrying out network sweep.
Above-mentioned candidate target access network information includes at least the network name of candidate target access net.
Optionally, candidate target access network information also may include the access of each candidate target net corresponding signal quality and/or
The priority and/or terminal of each candidate target access net determine the carrying information such as load identification for being switched to candidate target access net
(DRB ID).
In the present invention, candidate target access network information can be reported to base station by RRC information by transmission unit.
Base station determines target access network according to candidate target access network information, and issues switching command to receiving unit, cuts
Target access network can be switched to accordingly by changing unit.
It should be noted that in the present invention, when not receiving any order of base station transmission, switch unit can be defaulted
Without network switching.
In alternative embodiment of the present invention, terminal further includes receiving unit, for receiving the instruction message of base station transmission, is opened
Unit, for opening ANDSF according to the instruction message.
As opening unit can based on the received base station broadcast system message open ANDSF.Specifically, receiving unit, is used
In the system message for receiving and reading base station broadcast, it is then turned on whether unit judges allow to open ANDSF.If receiving one
The instruction of position Boolean type, value are " ture ", then opening unit judgement allows to open ANDSF, to open ANDSF.If
The value of Boolean type instruction is " false ", then opening unit judgement does not allow to open ANDSF, then is not turned on ANDSF.
In the present invention in another alternative embodiment, terminal further includes transmission unit, is opened for sending request to base station
The request of ANDSF, such as when detecting the access net for meeting preset condition, transmission unit sends above-mentioned request to base station.Specifically
, transmission unit can send above-mentioned request to base station by RRC information.Base station returns to instruction message according to above-mentioned request, this refers to
Show that message can be sent by RRC information.Receiving unit receives the RRC information, is then turned on whether unit judges allow to open
ANDSF.If receiving the instruction of a Boolean type, value is " ture ", then judgement allows to open ANDSF, if should
The value of Boolean type instruction is " false ", then judges not allow to open ANDSF.
Wherein, above-mentioned instruction message can be what base station was generated according to local policy, is also possible to base station and combines local plan
What the ANDSF information slightly and from core net obtained generated.For details, reference can be made to the correlations in embodiment one to discuss.
In an alternative embodiment, above-mentioned receiving unit is also used to receive ANDSF information from core net, then acquiring unit
Network sweep is carried out according to ANDSF information, obtains access network information.
Acquiring unit can according in ANDSF information inter-system mobility strategy and access network discovery information detect phase
The network answered, network site and network name such as acquiring unit according to the access network discovery information in ANDSF information, is being closed
Network discovery function is opened in suitable position, carries out network sweep；For another example acquiring unit can be moved according between system to policy priority
The high network of scan priority.
It should be noted that if in the instruction message that base station issues at the same include network sweep period, obtain list
Member can carry out network sweep according to the period.Compared with the prior art, which saves terminal electricity consumption.
Terminal of the present invention may also include determining that unit, connect for the access net for meeting certain condition to be determined as candidate target
It networks, the access net for meeting ANDSF information is such as determined as candidate target access net.
In alternative embodiment of the invention, base station can issue the successful condition of network discovery such as access net signal simultaneously and refer to
The thresholding of order to terminal, determination unit can further combine the condition, will meet the access of the successful condition of the network discovery
Net is determined as target access network.
In the present invention, candidate target access network information can be reported to base station by RRC information by transmission unit.Further
Ground, the embodiment of the invention also provides the hardware of base station compositions.It may include at least one processor (such as CPU), at least one
Network interface or other communication interfaces, memory and at least one communication bus, for realizing the connection between these devices
Communication.Processor is for executing the executable module stored in memory, such as computer program.Memory may include high speed
Random access memory (RAM:Random Access Memory), it is also possible to further include non-labile memory (non-
Volatile memory), a for example, at least magnetic disk storage.(it can be wired or nothing by least one network interface
Line) realize communication connection between the system gateway and at least one other network element, internet can be used, wide area network is local
Net, Metropolitan Area Network (MAN) etc..
Referring to Fig. 5, in some embodiments, program instruction is stored in memory, program instruction can be with device processed
It executes, wherein program instruction may include that indicating unit 31, receiving unit 32, switch unit 33 or program instruction may also include
Transmission unit 34, processing unit 35.The specific implementation of each unit can be found in the revealed corresponding units of embodiment two, here no longer
It repeats.Processor is used for according to above procedure instruction execution following steps:
Instruction terminal opens access network discovery and selection function ANDSF, is connect for the terminal by ANDSF acquisition
Inbound information, the access network information include candidate target access network information；
Receive the candidate target access network information that the terminal is sent；With
Target access network is determined according to the candidate target access network information, and the terminal is switched into the target and is connect
It networks.
The processor can also be according to other steps of the above-mentioned base station side embodiment of the method for above procedure instruction execution.The present invention
The hardware that embodiment additionally provides terminal is constituted.May include at least one processor (such as CPU), at least one network interface or
Other communication interfaces of person, memory and at least one communication bus, for realizing the connection communication between these devices.Processing
Device is for executing the executable module stored in memory, such as computer program.Memory may include high random access
Memory (RAM:Random Access Memory), it is also possible to further include non-labile memory (non-volatile
Memory), a for example, at least magnetic disk storage.Being realized by least one network interface (can be wired or wireless) should
Internet, wide area network, local network, Metropolitan Area Network (MAN) can be used in communication connection between system gateway and at least one other network element
Deng.
Referring to Fig. 6, in some embodiments, program instruction is stored in memory, program instruction can be with device processed
It executes, wherein program instruction may include opening unit 41, acquiring unit 42, transmission unit 43, switch unit 44 or program
Instruction may also include receiving unit 45.The specific implementation of each unit can be found in the revealed corresponding units of example IV, here not
It repeats again.Processor is used for according to above procedure instruction execution following steps:
Access network discovery and selection function ANDSF are opened according to the instruction of base station；
Access network information is obtained by the ANDSF, the access network information includes candidate target access network information；
The candidate target access network information is sent to the base station；
Switch to base station target access network according to determined by the candidate target access network information.
The processor can also be according to other steps of the above-mentioned terminal side embodiment of the method for above procedure instruction execution.
The present invention also provides a kind of switching systems, referring to Fig. 7, including at least one base station 51 and at least one above-mentioned end
End 52.
Wherein, above-mentioned base station is used to indicate terminal and opens ANDSF, receives the candidate target access network information that terminal is sent,
And target access network is determined according to candidate target access network information, instruction terminal switches to target access network.
Above-mentioned terminal carries out network sweep, obtains access network information, determine for opening ANDSF according to the instruction of base station
Candidate target access network information simultaneously sends candidate target access network information and refers to base station, switches to the target access network of base station transmission.
Wherein, terminal can carry out network sweep according to the ANDSF information obtained from core net and obtain access network information and determining candidate mesh
Tag splice networks.
In alternative embodiment of the invention, base station is also used to send instruction message to terminal, and terminal is also used to receive should
Instruction message simultaneously opens ANDSF according to the message, carries out network sweep and obtains access network information.
In the present invention, base station can be used for issuing above-mentioned instruction message by broadcast system message.
In another embodiment, to base station, base station is used for according to the request for the request of the transmittable request unlatching ANDSF of terminal
Above-mentioned instruction message is issued, specific terminal can be sent by RRC information and be requested, and base station can issue instruction by RRC information and disappear
Breath.
Wherein, above-mentioned instruction message can be generated with base station according to local policy, be also possible to base station in conjunction with local policy
With the ANDSF Infomiation Production that is obtained from core net.
When the base station of target access network and above-mentioned base station are the base station of 3GPP network, in handoff procedure, base station is also
For at least one of instruction message, ANDSF information to be sent to the base station of target access network, so as to the base of target access network
Next step wireless resource management (Radio Resource Management, RRM) strategy can be done accordingly by standing, and which
It is also beneficial to save and is spaced apart spending.
The following are one of present invention concrete application scenes, wherein the access net that terminal is currently located is LTE.Specifically
Process is as follows:
Terminal sends the request message of ANDSF information to core net.
The ANDSF information is issued to terminal upon receiving the request by core net.Wherein defined in ANDSF information
The priority of LTE network is higher than wlan network, contain in access network discovery information access net LTE2, WLAN1 and WLAN2,
The position of the title of WLAN3 and four access nets.
Terminal then sends opening network discovery feature request message to base station.Common to be, terminal is according to ANDSF information
It was found that reaching the condition of network discovery, then network discovery request message is sent to base station.Wherein discovery reaches the item of network discovery
Part has into access net position (such as longitude and latitude) indicated by access network discovery information in ANDSF information, or enters ANDSF and believe
The network name (such as cell ID of LTE) of access net indicated by access network discovery information in breath.Terminal can based on RRC information to
Base station sends network discovery request message.
Base station finds the overload of current LTE1 network, and have available WLAN net in coverage area by detection
Network, is then arranged the instruction of a Boolean type, and sets the values to ' ture ', the instruction is issued to by RRC information
Terminal.In addition, it is 1 hour that base station has issued the network sweep period simultaneously, the successful condition of network discovery is network signal quality
Not less than T.
Terminal obtains the RRC information, and determining base station by the value that Boolean type indicates allows its opening network to send out
Existing function.Then terminal per every other hour according in ANDSF information in access network discovery information network site and network name,
Network discovery function is opened in place, carries out network sweep, and excellent come priority scan to strategy according to movement between system
The high network of first grade and LTE network.
Terminal, to tri- networks of LTE2, WLAN1 and WLAN2, and finds LTE2, WLAN1 network signal matter through Scanning Detction
Amount T1, T2 are above T, and T2 is greater than T1, and WLAN2 network signal quality T3 is lower than T.It will thus according to network discovery success conditions
LTE2, WLAN1 are determined as candidate access network.
Terminal priority orders according to defined in ANDSF information are by the information of candidate access network according to LTE2, WLAN1
Sequence reports to base station.The information wherein reported includes title (LTE2, WLAN1), position, the network signal matter of candidate access network
The Deta bearer that be switched to target access network that amount (T1, T2) and terminal determine identifies DRB ID1.
Base station is larger according to the bandwidth that the qos parameter of DRB ID1 determines DRB needs, and only the bandwidth of WLAN1 can expire
Foot.Then, WLAN1 is determined as target access network by base station, and issues switching instruction to terminal.
Terminal obtains the instruction, and the corresponding bearer service of DRB ID1 is then routed to WLAN1 network.
The above are terminals to be switched to wlan network by LTE, and in practical applications, terminal can also be cut by WLAN as needed
Change to LTE network.Detailed process is with and will not be described here in detail.
Although the preferred embodiment of the application has been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications can be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the application range.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (22)
1. a kind of switching method characterized by comprising
Base station instruction terminal opens access network discovery and selection function ANDSF, is connect for the terminal by ANDSF acquisition
Inbound information, the access network information include candidate target access network information；
The base station receives the candidate target access network information that the terminal is sent；With
The base station determines target access network according to the candidate target access network information, and the terminal is switched to the mesh
Tag splice networks.
2. the method as described in claim 1, which is characterized in that the base station instruction terminal opens ANDSF, specifically includes:
The base station sends instruction message to the terminal, the instruction message be used to indicate the terminal whether open it is described
ANDSF；
The base station indicates that the terminal opens the ANDSF by the instruction message.
3. method according to claim 1 or 2, which is characterized in that further include:
The base station is determined according to following at least one situation indicates that the terminal opens the ANDSF:
The load capacity of the base station is greater than the first pre-determined threshold or the movement speed of the terminal is lower than the second pre-determined threshold；
The base station determines the closed state for indicating that the terminal keeps the ANDSF according to following at least one situation:
There is no the movement speeds of changeable access net or the terminal to be higher than third pre-determined threshold for the base station confirmation.
4. method as claimed in claim 3, which is characterized in that further include:
The base station receives the ANDSF information that core net is sent；
The base station further confirms that whether indicate that the terminal opens the ANDSF according to the ANDSF information.
5. method according to claim 1 or 2, which is characterized in that further include:
The base station receives the request that the terminal is sent, and the request is for requesting the base station to indicate that the terminal opens institute
State ANDSF.
6. method according to claim 1 or 2, it is characterised in that:
When the base station of the base station and the target access network is the base station of 3GPP network, in handoff procedure, the base
It stands following at least one base station for being sent to the target access network also:
The instruction message；
The ANDSF information.
7. a kind of base station characterized by comprising
Indicating unit is used to indicate terminal and opens access network discovery and selection function ANDSF, passes through for the terminal described
ANDSF obtains access network information, and the access network information includes candidate target access network information；
Receiving unit, the candidate target access network information sent for receiving the terminal；With
Switch unit for determining target access network according to the candidate target access network information, and the terminal is switched to
The target access network.
8. base station as claimed in claim 7, which is characterized in that further include:
Transmission unit, for sending instruction message to the terminal, the instruction message is used to indicate whether the terminal opens
The ANDSF.
9. base station as claimed in claim 7 or 8, which is characterized in that further include:
Processing unit indicates that the terminal opens the ANDSF for determining according to following at least one situation:
The load capacity of base station is greater than the first pre-determined threshold or the movement speed of the terminal is lower than the second pre-determined threshold；Or
For determining the closed state for indicating that the terminal keeps the ANDSF according to following at least one situation:
There is no the movement speeds of changeable access net or the terminal to be higher than third pre-determined threshold for confirmation.
10. base station as claimed in claim 9, it is characterised in that:
The receiving unit is also used to receive the ANDSF information of core net transmission；
The processing unit is also used to further confirm that whether indicate that the terminal opens the ANDSF according to ANDSF information.
11. base station as claimed in claim 7 or 8, it is characterised in that:
The receiving unit is also used to receive the request that the terminal is sent, and the request is for requesting the indicating unit to refer to
Show that the terminal opens the ANDSF.
12. base station as claimed in claim 8, it is characterised in that:
When the base station and the target access network are in 3GPP network, in handoff procedure, the transmission unit, also
For following at least one to be sent to the target access network:
The instruction message；
The ANDSF information.
13. a kind of switching method characterized by comprising
Terminal opens access network discovery and selection function ANDSF according to the instruction of base station；
Terminal obtains access network information by the ANDSF, and the access network information includes candidate target access network information；
The terminal sends the candidate target access network information to the base station；
The terminal switches to base station target access network according to determined by the candidate target access network information.
14. method as claimed in claim 13, which is characterized in that terminal opens access network discovery and choosing according to the instruction of base station
Function ANDSF is selected, is specifically included:
The terminal receives the instruction message that the base station is sent, and the instruction message is used to indicate whether the terminal opens
ANDSF；
The terminal opens the ANDSF according to the instruction message.
15. method according to claim 13 or 14, which is characterized in that further include:
The terminal sends a request to the base station, wherein the request is for requesting the base station to indicate that the terminal is opened
The ANDSF.
16. method according to claim 13 or 14, it is characterised in that:
When the load capacity of the base station is greater than the movement speed of the first pre-determined threshold or the terminal lower than the second pre-determined threshold,
The instruction message is used to indicate the terminal and opens the ANDSF；
When there is no the changeable target access network or the screen of the terminal are pre- higher than third for base station confirmation
Gating is prescribed a time limit, and the instruction message is used to indicate the closed state that the terminal keeps the ANDSF.
17. the method described in claim 16, which is characterized in that the instruction message is that the base station is sent according to core net
ANDSF information generate.
18. a kind of terminal characterized by comprising
Opening unit, for opening access network discovery and selection function ANDSF according to the instruction of base station；
Acquiring unit, for obtaining access network information by the ANDSF, the access network information includes candidate target access net
Information；
Transmission unit, for sending the candidate target access network information to the base station；
Switch unit accesses the determining target access network of net according to the candidate target for switching to the base station.
19. terminal as claimed in claim 18, which is characterized in that further include:
Whether receiving unit, the instruction message sent for receiving the base station, the instruction message are used to indicate the terminal
Open ANDSF.
20. the terminal as described in claim 18 or 19, it is characterised in that:
The transmission unit is also used to send a request to the base station, wherein the request is for requesting base station instruction institute
It states terminal and opens the ANDSF.
21. terminal as claimed in claim 19, which is characterized in that
When the load capacity of the base station is greater than the movement speed of the first pre-determined threshold or the terminal lower than the second pre-determined threshold,
The instruction message is used to indicate the terminal and opens the ANDSF；
When base station confirmation is higher than third pre-determined threshold there is no the screen of changeable access net or the terminal,
The instruction message is used to indicate the closed state that the terminal keeps the ANDSF.
22. terminal as claimed in claim 21, which is characterized in that the instruction message is that the base station is sent according to core net
ANDSF information generate.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2013/073701 WO2014161172A1 (en) | 2013-04-03 | 2013-04-03 | Switching method, base station and terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104969622A CN104969622A (en) | 2015-10-07 |
| CN104969622B true CN104969622B (en) | 2019-05-24 |
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| CN201380002674.9A Active CN104969622B (en) | 2013-04-03 | 2013-04-03 | A kind of switching method, base station and terminal |
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| WO (1) | WO2014161172A1 (en) |
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| EP3468258B1 (en) * | 2016-06-30 | 2021-09-22 | Huawei Technologies Co., Ltd. | Data transmission control method and device |
| CN111278073B (en) * | 2020-01-20 | 2022-03-08 | 普联技术有限公司 | WIFI roaming setting method and device, wireless connection equipment and readable storage medium |
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| CN101541064A (en) * | 2008-03-18 | 2009-09-23 | 华为技术有限公司 | Network discovery and selection method, network system and device |
| 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 |
| 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 |
| CN102422681A (en) * | 2009-05-04 | 2012-04-18 | 摩托罗拉移动公司 | Communication devices and methods for providing services to communication devices in a communication system including a private cell |
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|---|---|---|---|---|
| US8649359B2 (en) * | 2010-11-19 | 2014-02-11 | Nokia Corporation | Apparatus and method for selection of a gateway of a local area network |
| TWI463893B (en) * | 2011-07-07 | 2014-12-01 | Htc Corp | Method of handling access network discovery and selection function and related communication device |
| CN102958094B (en) * | 2011-08-19 | 2017-10-27 | 中兴通讯股份有限公司 | A kind of method and system for realizing that Home eNodeB Radio Access Network is shared |
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2013
- 2013-04-03 CN CN201380002674.9A patent/CN104969622B/en active Active
- 2013-04-03 WO PCT/CN2013/073701 patent/WO2014161172A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101541064A (en) * | 2008-03-18 | 2009-09-23 | 华为技术有限公司 | Network discovery and selection method, network system and device |
| 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 |
| CN102422681A (en) * | 2009-05-04 | 2012-04-18 | 摩托罗拉移动公司 | Communication devices and methods for providing services to communication devices in a communication system including a private cell |
| 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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| WO2014161172A1 (en) | 2014-10-09 |
| CN104969622A (en) | 2015-10-07 |
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