CN107371197A - A kind of switching method and base station - Google Patents
A kind of switching method and base station Download PDFInfo
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- CN107371197A CN107371197A CN201610312290.2A CN201610312290A CN107371197A CN 107371197 A CN107371197 A CN 107371197A CN 201610312290 A CN201610312290 A CN 201610312290A CN 107371197 A CN107371197 A CN 107371197A
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- frequency
- base station
- switching
- terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0077—Transmission or use of information for re-establishing the radio link of access information of target access point
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
Abstract
The embodiment of the invention discloses a kind of switching method and base station.Methods described includes：Source base station sends the handover request message for carrying customizing messages to target BS；The customizing messages is used for target BS selection frequency and accessed for terminal；Receive the handover request ack message of the target BS；The handover request ack message includes switching frequency point information；Switching command is sent to terminal；The switching command includes switching frequency point information.
Description
Technical field
The present invention relates to wireless communication technology, and in particular to a kind of switching method and base station.
Background technology
Current third generation partner program (3GPP, 3rd Generation Partnership Project) standard
The different frequency bands classification of definition exist each other it is overlapping, as BAND38 (TD-LTE, 2570~2620MHz),
(LTE-FDD is up by BAND41 (TD-LTE, 2496-2690MHz) and BAND7：2500-2570MHz,
It is descending：2620-2690MHz), it can be seen that BAND41 contains BAND38 and BAND7.If
Operator obtains BAND38 and BAND41 frequency ranges simultaneously, and the network equipment is using BAND38 as dominant frequency
Section, frequency range supplemented by BAND41.In this case, possesses overlapped frequency bands ability (for example B38/B41)
And support the terminal of multiband instruction enhancing to switch in different type X 2 interface between base stations, such as from Zhi Chichong
Fold frequency range ability (for example B38/B41) and support the base station that multiband instruction strengthens to support overlapped frequency bands energy
Power (for example B38/B41) but do not support multiband instruction enhancing base station between switching will have problem, lead
Cause handoff failure.
The content of the invention
To solve existing technical problem, the embodiment of the present invention provides a kind of switching method and base station, energy
Enough solves the problems, such as the handoff failure of overlapped frequency bands.
To reach above-mentioned purpose, what the technical scheme of the embodiment of the present invention was realized in：
The embodiments of the invention provide a kind of switching method, methods described includes：
Source base station sends the handover request message for carrying customizing messages to target BS；The customizing messages is used
Frequency is selected to be accessed for terminal in target BS；
Receive the handover request ack message of the target BS；The handover request ack message includes switching
Frequency point information；
Switching command is sent to terminal；The switching command includes switching frequency point information.
In such scheme, the source base station sends the handover request message for carrying customizing messages to target BS
Before, methods described also includes：The source base station is cut to the ability of target BS, terminal capability and target
Change frequency to be analyzed, judge whether increase customizing messages in handover request message based on analysis result.
It is described that the ability of target BS, terminal capability and target switching frequency are divided in such scheme
Analysis, judge whether increase customizing messages in handover request message based on analysis result, including：
When target BS support overlapped frequency bands and the terminal supports overlapped frequency bands and the target is cut
When to change frequency be overlapped frequency bands, judge to increase customizing messages in handover request message.
It is described that the ability of target BS, terminal capability and target switching frequency are divided in such scheme
Analysis, judge whether increase customizing messages in handover request message based on analysis result, including：
When the target BS does not support overlapped frequency bands or the terminal not to support overlapped frequency bands or the mesh
When mark switching frequency is not overlapped frequency bands, judge not increasing the customizing messages in handover request message.
In such scheme, the customizing messages includes：Source base station encryption key, terminal are resident frequency and network
Colour coding (NCC).
The embodiment of the present invention additionally provides a kind of switching method, and methods described includes：
Target BS receives the handover request message of source base station；
When the handover request message includes customizing messages and the target BS supports overlapped frequency bands,
Frequency is resident according to the terminal carried in terminal capability, the particular message and default switching law is cut
Change frequency point information；
The target BS sends the switching request response for carrying the switching frequency point information to the source base station
Message.
In such scheme, the terminal carried according to terminal capability, in the particular message be resident frequency with
And default switching law obtains switching frequency point information, including：
When it is the first priority that default switching law, which shows the resident frequency of terminal, then the target BS selection
The terminal is resident frequency as switching frequency；
When it is the first priority that default switching law, which shows frequency range maximum in overlapped frequency bands, then the target
The base station selected maximum frequency range is switching frequency；
When default switching law shows the frequency according to terminal initial access target BS selection as switching frequency
When, then the target BS selects the frequency of the terminal initial access as switching frequency according to terminal capability
Point.
In such scheme, the customizing messages also includes：Source base station encrypts key and NCC；Methods described is also
Including：
Encryption key is calculated based on source base station encryption key, NCC and the switching frequency.
The embodiment of the present invention additionally provides a kind of base station, and the base station is source base station；The base station includes：The
One transmitting element and the first receiving unit；Wherein,
First transmitting element, the handover request message of customizing messages is carried for being sent to target BS；
The customizing messages is used for target BS selection frequency and accessed for terminal；
First receiving unit, for receiving the handover request ack message of the target BS；It is described to cut
Changing request response includes switching frequency point information；
First transmitting element, it is additionally operable to send switching command to terminal；The switching command includes switching
Frequency point information.
In such scheme, the base station also includes first processing units, for first transmitting element to mesh
Before mark base station sends the handover request message for carrying customizing messages, ability, terminal energy to target BS
Power and target switching frequency are analyzed, and judge whether increase in handover request message based on analysis result
Customizing messages.
In such scheme, the first processing units, for when the target BS support overlapped frequency bands and
The terminal supports overlapped frequency bands and the target switching frequency when being overlapped frequency bands, judges in handover request
Increase customizing messages in message.
In such scheme, the first processing units, for when the target BS do not support overlapped frequency bands,
Or the terminal does not support overlapped frequency bands or the target to switch frequency when not being overlapped frequency bands, judges cutting
Changing does not increase the customizing messages in request message.
The embodiment of the present invention additionally provides a kind of base station, and the base station is target BS；The base station includes：
Second receiving unit, second processing unit and the second transmitting element；Wherein,
Second receiving unit, for receiving the handover request message of source base station；
The second processing unit, in the handover request message that is received when second receiving unit
When supporting overlapped frequency bands including customizing messages and the target BS, according to terminal capability, described specific
The terminal carried in message is resident frequency and default switching law obtains switching frequency；
Second transmitting element, cutting for the switching frequency point information is carried for being sent to the source base station
Change request response.
In such scheme, the second processing unit, for showing that terminal is resident frequency when default switching law
For the first priority when, then select the terminal be resident frequency for switching frequency；When default switching law shows
When maximum frequency range is the first priority in overlapped frequency bands, then the maximum frequency range is selected to switch frequency；
When default switching law shows according to the frequency of terminal initial access target BS selection as switching frequency,
Then according to terminal capability, the frequency of the terminal initial access is selected as switching frequency.
In such scheme, the customizing messages also includes：Source base station encrypts key and NCC；
The second processing unit, it is additionally operable to based on source base station encryption key, NCC and the switching frequency
Point calculates encryption key.
Switching method provided in an embodiment of the present invention and base station, on the one hand, source base station sends to target BS and taken
Handover request message with customizing messages；The customizing messages is used for target BS selection frequency and connect for terminal
Enter；Receive the handover request ack message of the target BS；The handover request ack message includes switching
Frequency point information；Switching command is sent to terminal；The switching command includes switching frequency point information.On the other hand,
Target BS receives the handover request message of source base station；When the handover request message include customizing messages,
And when the target BS supports overlapped frequency bands, according to the end carried in terminal capability, the particular message
The resident frequency in end and default switching law obtain switching frequency；The target BS is sent to the source base station
Carry the handover request ack message of the switching frequency point information.In this way, the skill using the embodiment of the present invention
Art scheme, source base station are divided according to the situation of terminal capability, target BS ability and target switching frequency
Analysis judges, increases an information newly in handover request message, by the mark in newly-added information, so as to mesh
Marking base station can select suitable switching frequency to be accessed for terminal according to terminal capability, so as to solve overlapping frequency
The problem of handoff failure of section, ensure the success of terminal switching.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the switching method of the embodiment of the present invention one；
Fig. 2 is that source base station judges whether increase the stream of customizing messages in handover request in the embodiment of the present invention one
Journey schematic diagram；
Fig. 3 is the schematic flow sheet of the switching method of the embodiment of the present invention two；
Fig. 4 is the schematic flow sheet of target BS selection switching frequency in the embodiment of the present invention two；
Fig. 5 is the schematic flow sheet of the switching method of the embodiment of the present invention three；
Fig. 6 is the first composition structural representation of the base station of the embodiment of the present invention；
Fig. 7 is second of composition structural representation of the base station of the embodiment of the present invention.
Embodiment
Present inventor has found, in the handoff procedure based on X2 interface, the foundation agreements of 3GPP 36.423,
Cell-of-origin needs to carry AS security information (AS in handover request (HANDOVER REQUEST) message
Security Information)；Key eNodeB Star letters are carried in the AS Security Information
First (being designated as KeNB* below).Described in 3GPP 33.401：Cell-of-origin uses Target cell thing
Manage cell ID (PCI, Physical Cell Identifier), downlink carrier frequency (DL-EARFCN)
Go to calculate the KeNB* used for Target cell with cell-of-origin (KeNB), and be sent to Target cell, mesh
Mark cell directly uses after receiving KeNB*.UE sides (are transmitted to UE after obtaining switching command containing target BS
EARFCN), pass through identical method calculate KeNB*.
According to the agreements of 3GPP 36.331, it is described as follows for Key eNodeB Star：If Target cell is attached most importance to
Folded frequency range cell, cell-of-origin selection are initially accessed Target cell selection bandwidth (band) identity logic with UE
Mode go calculate target side frequency (ARFCN), so as to calculate KeNB*.
For overlapped frequency bands cell, to possess overlapped frequency bands ability (for example B38/B41) and support multiband
Indicate that the terminal of enhancing switches (such as from support overlapped frequency bands ability (example in different type X 2 interface between base stations
Such as B38/B41) and support the base station that multiband instruction strengthens to support overlapped frequency bands ability (for example B38/B41)
But do not support to switch between the base station of multiband instruction enhancing) exemplified by, as multiband instruction enhancing is supported in cell-of-origin
And B38/B41, Target cell supports B38/B41 but does not support multiband instruction enhancing, so, supports
It will be accessed, switched to using B41 during the terminal access cell-of-origin of B38/B41 and support multiband instruction enhancing
During Target cell, cell-of-origin will use band41 to go to calculate KeNB*, and target as DL-ARFCN
Cell will pass to terminal using band38, and terminal will go to calculate using band38 as DL-ARFCN
The KeNB* of KeNB*, such terminal and Target cell will be inconsistent, so as to cause X2 interface handoff failure.
Based on this, the following embodiment of the present invention is proposed.
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further detailed explanation.
Embodiment one
The embodiments of the invention provide a kind of switching method.Fig. 1 is the switching method of the embodiment of the present invention one
Schematic flow sheet；As shown in figure 1, methods described includes：
Step 101：Source base station sends the handover request message for carrying customizing messages to target BS；It is described
Customizing messages is used for target BS selection frequency and accessed for terminal.
Step 102：Receive the handover request ack message of the target BS；The switching request response disappears
Breath includes switching frequency point information.
Step 103：Switching command is sent to terminal；The switching command includes switching frequency point information.
In the present embodiment, after the source base station receives the measurement report of terminal, it is determined that initiating the terminal-pair
The handover operation answered.
As a kind of embodiment, the switching that the source base station carries customizing messages to target BS transmission please
Before seeking message, methods described also includes：The source base station to the ability of target BS, terminal capability and
Target switching frequency is analyzed, and judges whether increase specific letter in handover request message based on analysis result
Breath.
In the present embodiment, the source base station switches frequency to the ability of target BS, terminal capability and target
Analyzed, judge whether increase customizing messages in handover request message based on analysis result, including：
When target BS support overlapped frequency bands and the terminal supports overlapped frequency bands and the target is cut
When to change frequency be overlapped frequency bands, judge to increase customizing messages in handover request message；
Accordingly, when the target BS does not support overlapped frequency bands or the terminal do not support overlapped frequency bands,
Or target switching frequency is not when being overlapped frequency bands, judge not increase in handover request message described specific
Information.
Specifically, Fig. 2 be the embodiment of the present invention one in source base station judge whether increase in handover request it is specific
The schematic flow sheet of information；As shown in Fig. 2 methods described includes：
Step 201：Source base station determines to initiate handover operation.
Step 202：Judge whether terminal supports overlapped frequency bands；When judging that terminal supports overlapped frequency bands, hold
Row step 203；When judging that terminal does not support overlapped frequency bands, step 206 is performed.
Step 203：Judge whether target BS supports overlapped frequency bands；When judgement target BS supports overlapping frequency
Duan Shi, perform step 204；When judging that target BS does not support overlapped frequency bands, step 206 is performed.
Step 204：Judge whether target switching frequency is overlapped frequency bands；When judgement target switching frequency is attached most importance to
During folded frequency range, step 205 is performed；When it is not overlapped frequency bands to judge target switching frequency, step 206 is performed.
Step 205：Customizing messages is added in handover request.
Step 206：Handover operation is handled according to existing protocol regulation.
In the present embodiment, specific letter is added in handover request (HANDOVER_REQUEST) message
Breath；The customizing messages is specifically as follows AS Security Information (Special) information.Specifically,
Handover request (HANDOVER_REQUEST) message described in the present embodiment can be represented by table 1；
As it can be seen from table 1 handover request described in the present embodiment (HANDOVER_REQUEST) message
In increase newly a field, the field be used for identify AS Security Information (Special) information, i.e.,
When based on the decision procedure shown in Fig. 2, determining that the target BS supports overlapped frequency bands and the terminal branch
Hold overlapped frequency bands and target switching frequency is when be overlapped frequency bands, AS Security are added in the field
Information (Special) information；Accordingly, determine the target BS do not support overlapped frequency bands or
Terminal described in person does not support overlapped frequency bands or the target to switch frequency when not being overlapped frequency bands, and existing
Protocol switching flow is identical, and AS Security Information (Special) information is not added in the field.
Specifically, the customizing messages includes：Source base station encryption key (KeNBsrc), terminal are resident frequency and net
Network colour coding (NCC, Next Hop Chaining Count).That is AS Security Information (Special)
Information includes：Source base station encryption key (KeNBsrc), terminal are resident frequency and NCC.It is specifically, described
Customizing messages (i.e. AS Security Information (Special) information) can be by shown in table 2.
Table 1
Table 2
In the present embodiment, the source base station receives the handover request ack message of the target BS；It is described to cut
Changing request response includes switching frequency point information；The switching frequency point information may include：Switch frequency and
NCC；The source base station sends switching command to terminal；The switching command includes the switching frequency point information；
The switching frequency point information may include：Switch frequency and NCC.The terminal receives cutting for the source base station
After changing order, based on the switching frequency and NCC in the switching command, key is encrypted with reference to source base station
(KeNBsrc) encryption key (KeNBsrc) is calculated, in order to which terminal is by calculating the encryption key obtained
(KeNBsrc) calculate the encryption key (KeNBsrc) obtained with target BS and carry out integrated authentication process,
So as to which the terminal and the target BS can be communicated.
Using the technical scheme of the embodiment of the present invention, source base station according to terminal capability, target BS ability and
The situation of target switching frequency carries out analysis judgement, an information is increased newly in handover request message, by right
Mark in newly-added information, so that target BS can select suitable switching frequency for eventually according to terminal capability
Terminate into so as to solve the problems, such as the handoff failure of overlapped frequency bands, the success of guarantee terminal switching.
Embodiment two
The embodiment of the present invention additionally provides a kind of switching method.Fig. 3 is the switching method of the embodiment of the present invention two
Schematic flow sheet；As shown in figure 3, methods described includes：
Step 301：Target BS receives the handover request message of source base station.
Step 302：When the handover request message includes customizing messages and target BS support
During overlapped frequency bands, the target BS is according to the resident frequency of terminal carried in terminal capability, the particular message
Point and default switching law obtain switching frequency point information.
Step 303：The target BS sends to the source base station and carries cutting for the switching frequency point information
Change request response.
Specifically, Fig. 4 is the schematic flow sheet of target BS selection switching frequency in the embodiment of the present invention two；
As shown in figure 4, the process that frequency is but changed in target BS selection includes：
Step 401：Target BS receives the handover request message of source base station.
Step 402：The target BS judges whether itself supports overlapped frequency bands；When judgement itself branch is prudent
During folded frequency range, step 403 is performed；When judging itself not support overlapped frequency bands, step 406 is performed.
Step 403：It whether there is customizing messages in detection handover request message；When judgement handover request message
In when customizing messages be present, perform step 404 to step 405；When judging to be not present in handover request message
During customizing messages, step 406 is performed.
Step 404：Extract the customizing messages in handover request message.
Step 405：Switching frequency is determined according to terminal capability and default switching law, and calculates encryption key.
Step 406：Handled according to existing protocol regulation.
In the present embodiment, the target BS receives the handover request of source base station
(HANDOVER_REQUEST) message；Judge whether to carry in the handover request message specific
Message.The handover request message specifically can refer in embodiment one shown in table 1, then the customizing messages can
Think AS Security Information (Special) information.Specifically judge be in the handover request message
No carrying AS Security Information (Special)；Do not carried when in the judgement handover request message
During AS Security Information (Special), then handled according to the handling process of existing protocol；When sentencing
AS Security Information (Special) information and described is carried in the fixed handover request message
When target BS supports overlapped frequency bands, the target BS is according to terminal capability, the AS Security
Terminal in Information (Special) be resident frequency (such as resident EARFCN shown in table 2) with
And default switching law selection switching frequency.
Specifically, in the present embodiment, it is described to be stayed according to the terminal carried in terminal capability, the particular message
Frequency and default switching law is stayed to obtain switching frequency point information, including：
When it is the first priority that default switching law, which shows the resident frequency of terminal, then the target BS selection
The terminal is resident frequency as switching frequency；
When it is the first priority that default switching law, which shows frequency range maximum in overlapped frequency bands, then the target
The base station selected maximum frequency range is switching frequency；
When default switching law shows the frequency according to terminal initial access target BS selection as switching frequency
When, then the target BS selects the frequency of the terminal initial access as switching frequency according to terminal capability
Point.
And also include as a kind of embodiment, the customizing messages：Source base station encrypts key and NCC；
Then the target BS is based on source base station encryption key, NCC and the switching frequency and calculates encryption key.
For example, the requirement of operator switching law is currently resident frequency using terminal as the first priority, then target base
Prioritizing selection terminal of standing currently is resident frequency as switching frequency；And the target BS is according to source station key
(KeNBsrc), NCC, the switching frequency (EARFCN) of selection calculate encryption key (KeNBdst)
So that target BS and terminal carry out integrated authentication process, so that the terminal and the target BS energy
Enough communicated.
For another example operator's switching law requires that big frequency range is the first priority (such as B38/B41 in overlapped frequency bands
Overlapped frequency bands, prioritizing selection B41), then target BS ignores terminal currently resident frequency, selects overlapped frequency bands
In big frequency range (such as B41) as switching frequency；And the target BS is according to source station key
(KeNBsrc), NCC, the switching frequency (EARFCN) of selection calculate encryption key (KeNBdst)
So that target BS and terminal carry out integrated authentication process, so that the terminal and the target BS energy
Enough communicated.
In another example the frequency that operator's switching law selects according to terminal initial access target BS is switching frequency
Point, then the target BS judged according to terminal capability, select terminal initial access the frequency of selection for
Switch frequency；And the target BS according to source station key (KeNBsrc), NCC, selection it is described
Switching frequency (EARFCN) calculates encryption key (KeNBdst) so that target BS and terminal have been carried out
Whole property verification process, so that the terminal and the target BS can be communicated.
Further, by switching frequency point information, (the switching frequency point information can specifically wrap the target BS
Include switching frequency and NCC) it is added to switching request response (HANDOVER REQUEST
ACKNOWLEDGE) in message, the handover request ack message is sent to source base station, by described
Source base station sends the switching frequency point information to terminal.
Using the technical scheme of the embodiment of the present invention, source base station according to terminal capability, target BS ability and
The situation of target switching frequency carries out analysis judgement, an information is increased newly in handover request message, by right
Mark in newly-added information, so that target BS can select suitable switching frequency for eventually according to terminal capability
Terminate into so as to solve the problems, such as the handoff failure of overlapped frequency bands, the success of guarantee terminal switching.
Embodiment three
The embodiment of the present invention additionally provides a kind of switching method.Fig. 5 is the switching method of the embodiment of the present invention three
Schematic flow sheet；As shown in figure 5, methods described includes：
Step 501：User equipment (UE) sends measurement report to source base station.
Step 502：The source base station receives the measurement report, it is determined that when initiating handover operation, to mesh
Ability, terminal capability and the target switching frequency for marking base station are analyzed, and judge cutting based on analysis result
Whether change in request (HANDOVER_REQUEST) message increases AS Security Information
(Special).It is specific to judge whether increase in handover request (HANDOVER_REQUEST) message
AS Security Information (Special) method is added to can refer to described in embodiment one, here no longer
Repeat.
Step 503：The source base station sends out the handover request (HANDOVER_REQUEST) message
Deliver to the target BS.
Step 504：The target BS receives the handover request of the source base station
(HANDOVER_REQUEST) whether message, detection HANDOVER_REQUEST include AS
Security Information(Special)；Determine that HANDOVER_REQUEST includes AS Security
During Information (Special), AS Security Information (Special) include：Source base station adds
Close key (KeNBsrc), terminal are resident frequency and NCC；The target BS extracts source base station therein and added
Close key (KeNBsrc), terminal are resident frequency and NCC, according to terminal capability, terminal be resident frequency and
Default switching law selection switching frequency, wherein, the selection mode for switching frequency specifically can refer to embodiment two
Described in, repeat no more here.The switching frequency and NCC of selection are added to switching request response
In (HANDOVER REQUEST ACKNOWLEDGE) message.
Step 505：The target BS is by switching request response (HANDOVER REQUEST
ACKNOWLEDGE) message is sent to the source base station.
Step 506：The source base station sends switching command to UE, and switching frequency is carried in the switching command
And NCC.The UE is encrypted secret based on the switching frequency and NCC in the switching command with reference to source base station
Key (KeNBsrc) calculates encryption key (KeNBsrc), in order to which terminal and target BS carry out integrality
Verification process, so that the terminal and the target BS can be communicated.
Using the technical scheme of the embodiment of the present invention, source base station according to terminal capability, target BS ability and
The situation of target switching frequency carries out analysis judgement, an information is increased newly in handover request message, by right
Mark in newly-added information, so that target BS can select suitable switching frequency for eventually according to terminal capability
Terminate into so as to solve the problems, such as the handoff failure of overlapped frequency bands, the success of guarantee terminal switching.
Example IV
The embodiment of the present invention additionally provides a kind of base station, and the base station is source base station.Fig. 6 is implemented for the present invention
The first composition structural representation of the base station of example；As shown in fig. 6, the first transmitting element 61 and first receives
Unit 62；Wherein,
First transmitting element 61, the handover request that customizing messages is carried for being sent to target BS disappear
Breath；The customizing messages is used for target BS selection frequency and accessed for terminal；
First receiving unit 62, for receiving the handover request ack message of the target BS；It is described
Handover request ack message includes switching frequency point information；
First transmitting element 61, it is additionally operable to send switching command to terminal；The switching command includes cutting
Change frequency point information.
As a kind of embodiment, the base station also includes first processing units 63, is sent for described first
Before unit 61 sends the handover request message for carrying customizing messages to target BS, to the energy of target BS
Power, terminal capability and target switching frequency are analyzed, and are judged based on analysis result in handover request message
In whether increase customizing messages.
In the present embodiment, after first receiving unit 62 receives the measurement report of terminal, at described first
Unit 63 is managed to determine to initiate handover operation corresponding to the terminal.
In the present embodiment, the first processing units 63, for when the target BS support overlapped frequency bands,
And the terminal supports overlapped frequency bands and the target switching frequency when be overlapped frequency bands, judges to ask in switching
Asking increases customizing messages in message.Accordingly, the first processing units 63, for when the target BS
Overlapped frequency bands or the terminal is not supported or not that overlapped frequency bands or target switching frequency are not overlapping
During frequency range, judge not increasing the customizing messages in handover request message.
In the present embodiment, the first processing units 63 are at handover request (HANDOVER_REQUEST)
Customizing messages is added in message；The customizing messages is specifically as follows AS Security Information
(Special) information.Specifically, the handover request (HANDOVER_REQUEST) described in the present embodiment
Message can be represented by table 1；As it can be seen from table 1 handover request described in the present embodiment
(HANDOVER_REQUEST) field is increased in message newly, the field is used to identify AS Security
Information (Special) information, i.e., when based on the decision procedure shown in Fig. 2, determining the target base
Support overlapped frequency bands of standing and the terminal support that overlapped frequency bands and target switching frequency are overlapped frequency bands
When, add AS Security Information (Special) information in the field；Accordingly, institute is determined
Stating target BS does not support overlapped frequency bands or the terminal not to support overlapped frequency bands or the target to cut
It is identical with existing protocol switching flow when to change frequency be not overlapped frequency bands, do not add AS in the field
Security Information (Special) information.Specifically, the customizing messages includes：Source base station adds
Close key (KeNBsrc), terminal are resident frequency and Network Color Code (NCC, Next Hop Chaining Count).
I.e. AS Security Information (Special) information includes：Source base station encryption key (KeNBsrc),
Terminal is resident frequency and NCC.Specifically, customizing messages (the i.e. AS Security Information
(Special) information) can be by shown in table 2.
As a kind of embodiment, when first transmitting element 61 sends the handover request message to institute
After stating target BS, first receiving unit 62, the handover request for being additionally operable to receive the target BS is rung
Answer message；The handover request ack message includes switching frequency point information；First transmitting element 61, also
For sending switching command to terminal；The switching command includes switching frequency point information.The terminal receives
After the switching command of the source base station, based on switching frequency point information (the switching frequency in the switching command
Point information can include switching frequency and NCC), calculate encryption with reference to source base station encryption key (KeNBsrc)
Key (KeNBsrc), in order to terminal and target BS integrated authentication process, so as to the terminal and institute
Stating target BS can be communicated.
It will be appreciated by those skilled in the art that in the source base station of the embodiment of the present invention each processing unit function,
It can refer to the associated description of foregoing switching method and understand, each processing unit in the source base station of the embodiment of the present invention,
It can be realized by realizing the analog circuit of the function described in the embodiment of the present invention, can also be by performing this hair
Operation of the software of function described in bright embodiment on intelligent terminal and realize.
In embodiments of the present invention, the first processing units 63 in the source base station, in actual applications
By the central processing unit (CPU, Central Processing Unit) in the source base station, Digital Signal Processing
Device (DSP, Digital Signal Processor) or programmable gate array (FPGA, Field-Programmable
Gate Array) realize；The first transmitting element 61 and the first receiving unit 62 in the source base station, in reality
It can be realized in the application of border by the dual-mode antenna in the source base station.
Embodiment five
The embodiment of the present invention additionally provides a kind of base station, and the base station is target BS.Fig. 7 is real for the present invention
Apply second of composition structural representation of the base station of example；As shown in fig. 7, the base station includes：Second receives
Unit 71, the transmitting element 73 of second processing unit 72 and second；Wherein,
Second receiving unit 71, for receiving the handover request message of source base station；
The second processing unit 72, for the handover request received when second receiving unit 71
When message includes customizing messages and target BS support overlapped frequency bands, according to terminal capability, institute
State the terminal carried in particular message and be resident frequency and default switching law acquisition switching frequency；
Second transmitting element 73, the switching frequency point information is carried for being sent to the source base station
Handover request ack message.
In the present embodiment, second receiving unit receives the handover request of source base station
(HANDOVER_REQUEST) message；The second processing unit 72 judges that the handover request disappears
Whether particular message is carried in breath.The handover request message specifically can refer in embodiment one shown in table 1,
Then the customizing messages can be AS Security Information (Special) information.The second processing
Unit 72 specifically judges AS Security Information whether are carried in the handover request message
(Special)；When judging not carry AS Security Information in the handover request message
(Special) when, then handled according to the handling process of existing protocol；When in the judgement handover request message
When carrying AS Security Information (Special) and target BS support overlapped frequency bands,
The second processing unit 72 is according to terminal capability, the AS Security Information (Special)
In terminal be resident frequency and default switching law selection switching frequency.
Specifically, in the present embodiment, the second processing unit 72, for showing end when default switching law
When the resident frequency in end is the first priority, then the terminal is selected to be resident frequency to switch frequency；Cut when default
When changing rule to show frequency range maximum in overlapped frequency bands being the first priority, then select the maximum frequency range for
Switch frequency；Cut when default switching law shows to be used as according to the frequency of terminal initial access target BS selection
When changing frequency, then according to terminal capability, the frequency of the terminal initial access is selected as switching frequency.
And also include as a kind of embodiment, the customizing messages：Source base station encrypts key and NCC；
The then second processing unit 72, it is additionally operable to based on source base station encryption key, NCC and the switching frequency
Point calculates encryption key.
For example, the requirement of operator switching law is currently resident frequency using terminal as the first priority, then target base
Prioritizing selection terminal of standing currently is resident frequency as switching frequency；And the target BS is according to source station key
(KeNBsrc), NCC, the switching frequency (EARFCN) of selection calculate encryption key (KeNBdst)
So that target BS and terminal carry out integrated authentication process, so that the terminal and the target BS energy
Enough communicated.
For another example operator's switching law requires that big frequency range is the first priority (such as B38/B41 in overlapped frequency bands
Overlapped frequency bands, prioritizing selection B41), then target BS ignores terminal currently resident frequency, selects overlapped frequency bands
In big frequency range (such as B41) as switching frequency；And the target BS is according to source station key
(KeNBsrc), NCC, the switching frequency (EARFCN) of selection calculate encryption key (KeNBdst)
So that target BS and terminal carry out integrated authentication process, so that the terminal and the target BS energy
Enough communicated.
In another example the frequency that operator's switching law selects according to terminal initial access target BS is switching frequency
Point, then the target BS judged according to terminal capability, select terminal initial access the frequency of selection for
Switch frequency；And the target BS according to source station key (KeNBsrc), NCC, selection it is described
Switching frequency (EARFCN) calculates encryption key (KeNBdst) so that target BS and terminal have been carried out
Whole property verification process, so that the terminal and the target BS can be communicated.
Further, (the switching frequency point information is specific by switching frequency point information for the second processing unit 72
Switching frequency and NCC can be included) it is added to switching request response (HANDOVER REQUEST
ACKNOWLEDGE) in message, second transmitting element sends the handover request ack message
To source base station, the switching frequency point information is sent to terminal by the source base station.
It will be appreciated by those skilled in the art that in the target BS of the embodiment of the present invention each processing unit function,
It can refer to the associated description of foregoing switching method and understand, each processing is single in the target BS of the embodiment of the present invention
Member, it can be realized by realizing the analog circuit of the function described in the embodiment of the present invention, execution can also be passed through
Operation of the software of function described in the embodiment of the present invention on intelligent terminal and realize.
In embodiments of the present invention, the second processing unit 72 in the target BS, in actual applications
It can be realized by CPU, DSP or FPGA in the target BS；Second in the target BS receives
Unit and the second transmitting element 73, it can be realized in actual applications by the dual-mode antenna in the target BS.
In several embodiments provided herein, it should be understood that disclosed apparatus and method, can
To realize by another way.Apparatus embodiments described above are only schematical, for example, institute
The division of unit is stated, only a kind of division of logic function, there can be other dividing mode when actually realizing,
Such as：Multiple units or component can combine, or be desirably integrated into another system, or some features can neglect
Slightly, or do not perform.In addition, the mutual coupling of shown or discussed each part or direct coupling
Close or communication connection can be by some interfaces, the INDIRECT COUPLING or communication connection of equipment or unit, can
To be electrical, mechanical or other forms.
The above-mentioned unit illustrated as separating component can be or may not be it is physically separate, as
The part that unit is shown can be or may not be physical location, you can positioned at a place, also may be used
To be distributed on multiple NEs；Partly or entirely unit therein can be selected according to the actual needs
Realize the purpose of this embodiment scheme.
In addition, each functional unit in various embodiments of the present invention can be fully integrated into a processing unit,
Can also be each unit individually as a unit, can also two or more units be integrated in one
In individual unit；Above-mentioned integrated unit can both be realized in the form of hardware, can also be added using hardware soft
The form of part functional unit is realized.
One of ordinary skill in the art will appreciate that：Realize that all or part of step of above method embodiment can
To be completed by the related hardware of programmed instruction, foregoing program can be stored in one and computer-readable deposit
In storage media, the program upon execution, execution the step of including above method embodiment；And foregoing storage
Medium includes：Movable storage device, read-only storage (ROM, Read-Only Memory), deposit at random
Access to memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can to store journey
The medium of sequence code.
Or if the above-mentioned integrated unit of the present invention is realized in the form of software function module and as independently
Production marketing or in use, can also be stored in a computer read/write memory medium.Based on so
Understanding, the part that the technical scheme of the embodiment of the present invention substantially contributes to prior art in other words can
To be embodied in the form of software product, the computer software product is stored in a storage medium, bag
Some instructions are included to so that a computer equipment (can be personal computer, server or network
Equipment etc.) perform all or part of each embodiment methods described of the present invention.And foregoing storage medium bag
Include：Movable storage device, ROM, RAM, magnetic disc or CD etc. are various can be with store program codes
Medium.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited to
This, any one skilled in the art the invention discloses technical scope in, can readily occur in
Change or replacement, it should all be included within the scope of the present invention.Therefore, protection scope of the present invention should
It is defined by the scope of the claims.
Claims (15)
1. a kind of switching method, it is characterised in that methods described includes：
Source base station sends the handover request message for carrying customizing messages to target BS；The customizing messages is used
Frequency is selected to be accessed for terminal in target BS；
Receive the handover request ack message of the target BS；The handover request ack message includes switching
Frequency point information；
Switching command is sent to terminal；The switching command includes switching frequency point information.
2. according to the method for claim 1, it is characterised in that the source base station is sent to target BS
Before the handover request message for carrying customizing messages, methods described also includes：
The source base station is analyzed the ability of target BS, terminal capability and target switching frequency, base
Judge whether increase customizing messages in handover request message in analysis result.
3. according to the method for claim 2, it is characterised in that the ability to target BS, end
End ability and target switching frequency analyzed, based on analysis result judge in handover request message whether
Increase customizing messages, including：
When target BS support overlapped frequency bands and the terminal supports overlapped frequency bands and the target is cut
When to change frequency be overlapped frequency bands, judge to increase customizing messages in handover request message.
4. according to the method for claim 2, it is characterised in that the ability to target BS, end
End ability and target switching frequency analyzed, based on analysis result judge in handover request message whether
Increase customizing messages, including：
When the target BS does not support overlapped frequency bands or the terminal not to support overlapped frequency bands or the mesh
When mark switching frequency is not overlapped frequency bands, judge not increasing the customizing messages in handover request message.
5. according to the method described in any one of Claims 1-4, it is characterised in that the specific packet
Include：Source base station encryption key, terminal are resident frequency and Network Color Code NCC.
6. a kind of switching method, it is characterised in that methods described includes：
Target BS receives the handover request message of source base station；
When the handover request message includes customizing messages and the target BS supports overlapped frequency bands,
Frequency is resident according to the terminal carried in terminal capability, the particular message and default switching law is cut
Change frequency point information；
The target BS sends the switching request response for carrying the switching frequency point information to the source base station
Message.
7. according to the method for claim 6, it is characterised in that described according to terminal capability, the spy
The terminal for determining to carry in message is resident frequency and default switching law obtains switching frequency point information, including：
When it is the first priority that default switching law, which shows the resident frequency of terminal, then the target BS selection
The terminal is resident frequency as switching frequency；
When it is the first priority that default switching law, which shows frequency range maximum in overlapped frequency bands, then the target
The base station selected maximum frequency range is switching frequency；
When default switching law shows the frequency according to terminal initial access target BS selection as switching frequency
When, then the target BS selects the frequency of the terminal initial access as switching frequency according to terminal capability
Point.
8. according to the method for claim 6, it is characterised in that the customizing messages also includes：Source base
Stand encryption key and NCC；Methods described also includes：
Encryption key is calculated based on source base station encryption key, NCC and the switching frequency.
9. a kind of base station, the base station is source base station；Characterized in that, the base station includes：First sends
Unit and the first receiving unit；Wherein,
First transmitting element, the handover request message of customizing messages is carried for being sent to target BS；
The customizing messages is used for target BS selection frequency and accessed for terminal；
First receiving unit, for receiving the handover request ack message of the target BS；It is described to cut
Changing request response includes switching frequency point information；
First transmitting element, it is additionally operable to send switching command to terminal；The switching command includes switching
Frequency point information.
10. base station according to claim 9, it is characterised in that the base station also includes the first processing
Unit, the handover request message for carrying customizing messages is sent to target BS for first transmitting element
Before, the ability of target BS, terminal capability and target switching frequency are analyzed, tied based on analysis
Fruit judges whether increase customizing messages in handover request message.
11. base station according to claim 10, it is characterised in that the first processing units, be used for
When target BS support overlapped frequency bands and the terminal support overlapped frequency bands and target switching frequency
When point is overlapped frequency bands, judge to increase customizing messages in handover request message.
12. base station according to claim 10, it is characterised in that the first processing units, be used for
When the target BS does not support overlapped frequency bands or the terminal not to support overlapped frequency bands or the target to cut
When to change frequency be not overlapped frequency bands, judge not increasing the customizing messages in handover request message.
13. a kind of base station, the base station is target BS；Characterized in that, the base station includes：Second
Receiving unit, second processing unit and the second transmitting element；Wherein,
Second receiving unit, for receiving the handover request message of source base station；
The second processing unit, in the handover request message that is received when second receiving unit
When supporting overlapped frequency bands including customizing messages and the target BS, according to terminal capability, described specific
The terminal carried in message is resident frequency and default switching law obtains switching frequency；
Second transmitting element, cutting for the switching frequency point information is carried for being sent to the source base station
Change request response.
14. base station according to claim 13, it is characterised in that the second processing unit, be used for
When it is the first priority that default switching law, which shows the resident frequency of terminal, then the terminal is selected to be resident frequency
To switch frequency；When it is the first priority that default switching law, which shows frequency range maximum in overlapped frequency bands, then
The maximum frequency range is selected to switch frequency；When default switching law shows to access target according to terminal initial
When base station selected frequency is as switching frequency, then according to terminal capability, the terminal initial access is selected
Frequency is as switching frequency.
15. base station according to claim 13, it is characterised in that the customizing messages also includes：Source
Encrypt key and NCC in base station；
The second processing unit, it is additionally operable to based on source base station encryption key, NCC and the switching frequency
Point calculates encryption key.
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