CN101860928B - Method for switching negotiation initiated by base station and base station using same - Google Patents
Method for switching negotiation initiated by base station and base station using same Download PDFInfo
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- CN101860928B CN101860928B CN 200910106569 CN200910106569A CN101860928B CN 101860928 B CN101860928 B CN 101860928B CN 200910106569 CN200910106569 CN 200910106569 CN 200910106569 A CN200910106569 A CN 200910106569A CN 101860928 B CN101860928 B CN 101860928B
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Abstract
The invention relates to a method for switching negotiation initiated by a base station and the base station using the same in a WiMAX system. The method comprises the following steps that: a server base station sends MOB_BSHO-REQ messages to a terminal, wherein the MOB_BSHO-REQ messages carry an SCN-RSP relevant parameter list for scanning a neighbor cell base station of the server base station; and when the terminal has no relevant information of the neighbor cell base station in a scanning association set, the terminal scans the neighbor cell base station by using the SCN-RSP relevant parameter list, determines whether the neighbor cell base station is switched or not according to the signal quality of the neighbor cell base station, and responds to the base station through the MOB_HO-IND messages. In the method, when the terminal does not make scanning association action in advance, the terminal is guided to perform scanning by utilizing corresponding parameters attached in the MOB_BSHO-REQ messages sent by the base station, and the switching process contains the pilot frequency scanning process to improve the flow of active switching.
Description
Technical field
The present invention relates to field of mobile communication, relate in particular to WiMAX (access of Worldwide Interoperability forMicrowave Access worldwide interoperability for microwave) system, specifically the present invention relates to the switching negotiation of being initiated by the base station in the WiMAX system and the base station of using the method.
Background technology
In existing WiMAX system, the promoter of switching flow can be that terminal also can be the base station, in the time of serving BS broadcasts (base station) poor signal, terminal is used DCD message (Downlink ChannelDescriptor, the down channel descriptor) the built-in Trigger in, self driver sweep and switching flow.
When initiatively switching, BS initiatively sends MOB_BSHO-REQ to terminal, carries the target BS of recommendation in the handover request message, and terminal is assessed and adjudicated, follow-up response MOB_HO-IND message the target BS of recommending according to the related flow process of scanning before.The target BS of recommending here can be one or more, and the signal(l)ing condition of the neighbor base station that the serving BS when occuring according to switching is preserved is different and different.
Problem is, after BS transmission MOB_BSHO-REQ is to terminal, if terminal was not done the scanning association to the adjacent area before, if MS agrees to switch, is equal to and carries out blind cutting, and the mortality of switching is larger; If MS refuses to switch, initiatively switch and to develop normally.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part, optimize BS active handoff functionality in the WiMAX system, disclose a kind of by the base station switching negotiation of initiating and the base station of using the method, having remedied in actual applications, agreement has the wider scope of application to active handoff functionality and the concrete disappearance that triggers the counter-measure of scene.
A kind of switching negotiation of being initiated by the base station disclosed by the invention sends MOB_BSHO-REQ message to terminal by serving BS, carries the SCN-RSP relevant parameter tabulation of the neighbor base station of the described serving BS of scanning in the described MOB_BSHO-REQ message; When described terminal does not have relevant neighbor base station information in the scanning incidence set, use the described neighbor base station of described SCN-RSP relevant parameter tabulation scanning, and with the target BS of described neighbor base station as switching, the signal quality of judging described target BS determines whether switch, and passes through MOB_HO-IND message response to described serving BS.
A kind of switching negotiation of being initiated by the base station disclosed by the invention also comprises following subordinate technical characterictic:
The SCN-RSP relevant parameter tabulation of the neighbor base station of described serving BS is above one; Described terminal uses described SCN-RSP relevant parameter tabulation to scan respectively the neighbor base station that each does not have in described scanning incidence set, relatively judge one by one again the quality of the signal of all neighbor base stations, select signal best as target BS, quality according to described target BS signal determines whether switch again, and passes through MOB_HO-IND message response to described serving BS.
The SCN-RSP relevant parameter tabulation of described neighbor base station is adjustable length SCN-RSP TLV value.
When described terminal has relevant neighbor base station information in the scanning incidence set, directly determine whether to switch to described target BS according to the neighbor base station information in the described scanning incidence set, and pass through MOB_HO-IND message response to described serving BS.
The invention also discloses a kind of base station of using aforementioned switching negotiation, comprise handover request message generation and sending module, and terminal is switched the message sink module; Described handover request message generation and sending module generate and send MOB_BSHO-REQ message and initiate the base station handover request to terminal, carry the SCN-RSP relevant parameter tabulation of scanning neighbor base station in the described MOB_BSHO-REQ message; The described neighbor base station of described terminal scanning is instructed in the tabulation of the SCN-RSP relevant parameter of described neighbor base station, judges whether to switch as the target BS that switches and according to the quality of the signal of described target BS with described neighbor base station; Described terminal switch the message sink module receive from described terminal about whether switching to the message of described target BS.
In the base station of the aforementioned switching negotiation of use disclosed by the invention, the SCN-RSP relevant parameter of the scanning neighbor base station that carries in the MOB_BSHO-REQ message that described handover request message generation and sending module generate and send is tabulated above one; The SCN-RSP relevant parameter tabulation of described neighbor base station instructs described terminal to scan one by one each described neighbor base station, described terminal is relatively judged the quality of the signal of all neighbor base stations one by one, select signal best as target BS, and judge whether to switch according to the quality of the signal of described target BS.
Disclosed by the invention a kind of by the base station switching negotiation of initiating and the base station of using the method, it is the optimization method that a kind of BS initiatively switches, when terminal is not done the scanning relevant action in advance, the guidance of the parameter of adding in the MOB_BSHO-REQ message of utilizing the base station to send scans, the different frequency scanning process is included in the handoff procedure perfect initiatively switching flow.And terminal can be selected advanced line scanning or ignore scanning process directly to switch according to the actual conditions of self.
Description of drawings
Fig. 1 is the flow chart of switching negotiation of being initiated by the base station of the present invention.
Fig. 2 is handover request is initiatively initiated in signaling sequence figure from base station of the present invention to terminal.
Fig. 3 is that terminal of the present invention is initiated the signaling sequence figure to the scanning motion of adjacent area BS.
Fig. 4 is that terminal of the present invention sends the signaling sequence figure that the switching indication begins to switch or refuse switching to serving BS.
Fig. 5 is that use of the present invention is by the structural representation of the base station of the switching negotiation of base station initiation.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further details.
At first in MOB_BSHO-REQ message, carry the relevant parameter of scanning, in this message, increase the TLV (Type Length Value type length numerical value) of one group of SCN-RSP (scanning response):
| Name | Type | Length(1 byte) | Value | Scope |
| SCN-RSP encodings | 2 | variable | SCN-RSP TLV items for HO optimization. | MOB_BSHO- REQ |
When MS (terminal) receives the handover request that BS initiatively initiates, can use flexibly the field of SCN-RSP (scanning response) according to s own situation.The form here is the form of general use form of protocol description TLV, and those skilled in the art see that title can know the content of form.
As shown in Figure 1, be the flow chart of switching negotiation of being initiated by the base station of the present invention, when terminal when receiving the handover request that BS initiates, according to actual conditions, exists 4 kinds of different modes to go to tackle.
Mode 1:MS selects first scanning, switches again.
Such as the step 110 among Fig. 1, MS has received the handover request message MOB_BSHO-REQ that BS initiatively initiates, and has carried the adjacent area BS tabulation that serving BS broadcasts is recommended in the message, comprises BSA# in the tabulation.
Then, MS inquires about relevant adjacent area BS information in the scanning incidence set of oneself, such as the step 120 among Fig. 1.
After the scanning, carry out step 150, MS judges whether the signal of adjacent area is enough good, and is good then can be used as new target BS.
Carry out step 162, MS sends and switches indication, begins this change action.
Mode 2:MS selects first scanning, and refusal switches again.
Such as the step 110 among Fig. 1, MS has received the handover request message that BS initiatively initiates, and has carried the adjacent area BS tabulation that serving BS broadcasts is recommended in the message, comprises BS A#.
After the scanning, carry out step 150:MS judgement and think that the signal of adjacent area is very poor, should be as new target BS.
Step 161:MS sends and switches indication, refuses this change action.
Mode 3:MS does not scan, and directly switches.
Such as the step 110 among Fig. 1, MS has received the handover request message that BS initiatively initiates, and has carried the adjacent area BS tabulation that serving BS broadcasts is recommended in the message, comprises BS A#.
Step 120:MS inquires about relevant adjacent area BS information in the scanning incidence set of oneself.
Step 130:MS judges the relevant adjacent area BS A# information of having found.
Step 150:MS judges that the signal of adjacent area is better, can be used as new target BS.
Step 162:MS sends and switches indication, carries out this change action.
Mode 4:MS does not scan, and directly refusal switches.
Receive the handover request message that BS initiatively initiates such as the step 110:MS among Fig. 1, carried the adjacent area BS tabulation that serving BS broadcasts is recommended in the message, comprised BS A#
Step 120:MS inquires about relevant adjacent area BS information in the scanning incidence set of oneself.
Step 130:MS judges the relevant adjacent area BS A# information of having found.
Step 140:MS judges the poor signal of adjacent area, should be as new target BS.
Step 160:MS sends and switches indication, refuses this change action.
Compared with prior art, the present invention proposes the optimization method that a kind of BS initiatively switches, when MS does not do the scanning relevant action in advance, BS can be when transmission MOB_BSHO-REQ be to terminal, additional corresponding parameter instructs terminal to scan simultaneously, the different frequency scanning process is included in the handoff procedure, improves the flow process of initiatively switching.And terminal can be selected advanced line scanning or ignore scanning process directly to switch according to the actual conditions of self.
When the relevant parameter of the scanning of carrying in the MOB_BSHO-REQ message that serving BS sends relates to a plurality of target BS, terminal is inquired about relevant adjacent area BS information in the scanning incidence set of oneself after, scan at first one by one interior each neighbor base station not to be covered of scanning incidence set of oneself, relatively judge one by one again the quality of the signal of all neighbor base stations, select the best new target BS of conduct of signal, again according to the quality of this new target BS signal, send and switch indication to serving BS, show to switch or refuse and switch.
As shown in Figure 2, handover request is initiatively initiated in signaling sequence figure from base station of the present invention to terminal, serving BS broadcasts is sent MOB_BSHO-REQ message to terminal, initiatively initiate handover request, carry the adjacent area BS tabulation that serving BS broadcasts is recommended in the MOB_BSHO-REQ message, included BS A# in the adjacent area BS tabulation.The base station A here is an example, the expression terminal is done search relatively to all BS of adjacent area BS tabulation, the special scenes that does not have the information of base station A in the scanning contingency table the inside of self preserving, terminal can directly use SCN-RSP information in the handover request message of serving BS to initiate scanning to base station A in this case.
As shown in Figure 3, that terminal of the present invention is initiated the signaling sequence figure to the scanning motion of adjacent area BS, the occurrence of the SCN-RSPencodings that carries in the MOB_BSHO-REQ message from serving BS that terminal is received is used for the scanning to the adjacent area, has wherein also comprised the scanning to BS A#.
As shown in Figure 4, be that terminal of the present invention sends the signaling sequence figure that the switching indication begins to switch or refuse switching to serving BS, terminal sends MOB_HO-IND message to serving BS, and indication begins switching or refusal switching.
Be the structural representation that uses the base station of above-mentioned switching negotiation of being initiated by the base station as shown in Figure 5, comprise handover request message generation and sending module in this base station, and terminal switched the message sink module; Described handover request message generation and sending module generate and send MOB_BSHO-REQ message and initiate the base station handover request to terminal, carry the SCN-RSP relevant parameter tabulation of scanning neighbor base station in the described MOB_BSHO-REQ message; The described neighbor base station of described terminal scanning is instructed in the SCN-RSP relevant parameter tabulation of described neighbor base station, is used for judging whether to switch to described neighbor base station according to the signal quality of described neighbor base station; Described terminal switch the message sink module receive from described terminal about whether switching to the message of described neighbor base station.
Claims (8)
1. a switching negotiation of being initiated by the base station is characterized in that, sends MOB_BSHO-REQ message to terminal by serving BS, carries the SCN-RSP relevant parameter tabulation of the neighbor base station of the described serving BS of scanning in the described MOB_BSHO-REQ message; When described terminal does not have relevant neighbor base station information in the scanning incidence set, use the described neighbor base station of described SCN-RSP relevant parameter tabulation scanning, and with the target BS of described neighbor base station as switching, the signal quality of judging described target BS determines whether switch, and passes through MOB_HO-IND message response to described serving BS.
2. switching negotiation as claimed in claim 1 is characterized in that, the SCN-RSP relevant parameter tabulation of the neighbor base station of described serving BS is above one; Described terminal uses described SCN-RSP relevant parameter tabulation to scan respectively the neighbor base station that each does not have in described scanning incidence set, relatively judge one by one again the quality of the signal of all neighbor base stations, select signal best as target BS, quality according to described target BS signal determines whether switch again, and passes through MOB_HO-IND message response to described serving BS.
3. such as claim 1 or 2 described switching negotiations, it is characterized in that, the SCN-RSP relevant parameter tabulation of described neighbor base station is adjustable length SCN-RSP TLV value.
4. switching negotiation as claimed in claim 3, it is characterized in that, when described terminal has relevant neighbor base station information in the scanning incidence set, directly judge neighbor base station signal quality according to the neighbor base station information in the described scanning incidence set, determine whether to switch to described target BS, and pass through MOB_HO-IND message response to described serving BS.
5. one kind is used the as claimed in claim 1 base station of switching negotiation, comprises handover request message generation and sending module, and terminal is switched the message sink module; It is characterized in that, described handover request message generation and sending module generate and send MOB_BSHO-REQ message and initiate the base station handover request to terminal, carry the SCN-RSP relevant parameter tabulation of scanning neighbor base station in the described MOB_BSHO-REQ message; The described neighbor base station of described terminal scanning is instructed in the tabulation of the SCN-RSP relevant parameter of described neighbor base station, judges whether to switch as the target BS that switches and according to the quality of the signal of described target BS with described neighbor base station; Described terminal switch the message sink module receive from described terminal about whether switching to the message of described target BS.
6. base station as claimed in claim 5 is characterized in that, the SCN-RSP relevant parameter tabulation of the scanning neighbor base station that carries in the MOB_BSHO-REQ message that described handover request message generation and sending module generate and send is above one; The SCN-RSP relevant parameter tabulation of described neighbor base station instructs described terminal to scan one by one each described neighbor base station, described terminal is relatively judged the quality of the signal of all neighbor base stations one by one, select signal best as target BS, and judge whether to switch according to the quality of the signal of described target BS.
7. such as claim 5 or 6 described base stations, it is characterized in that, the SCN-RSP relevant parameter tabulation of described neighbor base station is adjustable length SCN-RSP TLV value.
8. base station claimed in claim 7, it is characterized in that, the SCN-RSP relevant parameter tabulation of described neighbor base station is compared with the scanning incidence set of described terminal, when in the scanning incidence set of described terminal relevant neighbor base station information being arranged, described terminal determines whether to switch to neighbor base station according to the signal quality of neighbor base station information relevant in the described scanning incidence set.
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| CN 200910106569 CN101860928B (en) | 2009-04-07 | 2009-04-07 | Method for switching negotiation initiated by base station and base station using same |
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| CN 200910106569 CN101860928B (en) | 2009-04-07 | 2009-04-07 | Method for switching negotiation initiated by base station and base station using same |
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| CN101860928B true CN101860928B (en) | 2013-01-16 |
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| CN108495342A (en) * | 2018-01-29 | 2018-09-04 | 努比亚技术有限公司 | A kind of switching method, terminal, base station and computer readable storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1794865A (en) * | 2005-06-06 | 2006-06-28 | 华为技术有限公司 | Method of switching terminal between base station |
| CN101360343A (en) * | 2008-09-05 | 2009-02-04 | 深圳华为通信技术有限公司 | Method, system and mobile terminal for switching by mobile terminal |
| CN101415244A (en) * | 2007-10-20 | 2009-04-22 | 华为技术有限公司 | Method and apparatus for responding scanning request |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1794865A (en) * | 2005-06-06 | 2006-06-28 | 华为技术有限公司 | Method of switching terminal between base station |
| CN101415244A (en) * | 2007-10-20 | 2009-04-22 | 华为技术有限公司 | Method and apparatus for responding scanning request |
| CN101360343A (en) * | 2008-09-05 | 2009-02-04 | 深圳华为通信技术有限公司 | Method, system and mobile terminal for switching by mobile terminal |
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