CN102076042B - Method for switching terminal, and terminal - Google Patents
Method for switching terminal, and terminal Download PDFInfo
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- CN102076042B CN102076042B CN 201110034560 CN201110034560A CN102076042B CN 102076042 B CN102076042 B CN 102076042B CN 201110034560 CN201110034560 CN 201110034560 CN 201110034560 A CN201110034560 A CN 201110034560A CN 102076042 B CN102076042 B CN 102076042B
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Abstract
The embodiment of the invention provides a method for switching a terminal, and the terminal. The method for switching the terminal comprises the following steps that: in the process of switching the terminal from a service base station to a target base station, the terminal receives a downlink channel descriptor (DCD)/uplink channel descriptor (UCD) broadcast message sent by the target base station; the terminal analyzes the DCD/UCD information content in the DCD/UCD broadcast message which is sent by the target base station and received for the first time, and updates the DCD/UCD information content stored by the terminal according to the analyzed DCD/UCD information content; and the terminal is switched to the target base station through the updated DCD/UCD information content. By the method, the terminal can avoid communication faults, such as error codes and the like, to ensure the success of switching and network accessing.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to method and terminal that a kind of terminal is switched.
Background technology
WiMAX (Worldwide Interoperability for Microwave Access, the worldwide interoperability for microwave access) (802.16e) agreement is to be formulated by IEEE (The Institute of Electrical and Electronics Engineers, U.S. electric and electronics engineers) 802.16e working group.802.16e can support some individual features of portable terminal, for example switch IDLE (mobile phone is in idle condition) etc.The reason that portable terminal switches is normally because the service quality of terminal has reduced, the reduction of Terminal Service quality can be that a lot of reasons causes, for example, variation has taken place in the position of terminal, or the position of terminal does not change still, and variation etc. has taken place environment.Terminal then needs to switch to the relative better cell of service quality from the bad residential quarter of service quality in order to keep the quality of its link of eating dishes without rice or wine.
Switching flow in the WiMAX network is: BS (Base Station) (is DCD (the Downlink channel descriptor of adjacent area by MOB_NBR-ADV periodic broadcasting neighboring BS information, downlink channel descriptor)/UCD (Uplink channel descriptor, uplink channel descriptor), the information that networks and to obtain), consult specific sweep spacing by MOB_SCN-REQ/RSP and MS then, in sweep spacing, MS needs scan N BR-ADV (Neighbor Advertisement, broadcasting) corresponding adjacent area message in the message, the residential quarter of selecting then to satisfy switching condition initiates to switch.
At network re-entry in the process of Target cell, MS need scan Preamble (preamble/header) and be synchronized to Target cell, waits for afterwards that synchronously receiving DCD/UCD broadcast (referring to DCD broadcast or UCD broadcast here) obtains some corresponding networking parameter informations.Because the DCD/UCD broadcast is to issue in the cycle, can all not send out by each frame, so the time that wait reception DCD/UCD broadcast spends is long.If MS can obtain DCD/UCD information in advance, will shorten the time of inserting Target cell when switching so greatly.
In the prior art, the base station of Serving cell can be placed among the DCD/UCD Setting of MOB_NBR-ADV message mode (the general DCD/UCD information content need be represented with a plurality of TLV) periodic broadcasting with TLV (Type Length Value, type lengths values) to the DCD/UCD information of neighbor base station (comprising target BS) and give MS.Like this, by MOB_NBR-ADV message, MS just can know the DCD/UCD information of neighbor base station in advance, make MS when switching quickly network re-entry to target BS, the shortening handover delay.
SBS (Serving Base Station, serving BS) the MOB_NBR-ADV message of Fa Songing can be carried a plurality of candidate TBS (Target Base Station, target BS) DCD/UCD information, consider that DCD/UCD information is periodic broadcasting, the frequency that changes is relatively slow, so terminal need not all to resolve the identical message content of carrying in the MOB_NBR-ADV message at every turn, so only when changing, just need parsing.MOB_NBR-ADV message indicates the content of MOB_NBR-ADV message whether variation has taken place by the CCC (Configuration Change Count, configuration change counter) that comprises in the MOB_NBR-ADV message.After terminal is received MOB_NBR-ADV message, variation has taken place if find the CCC that comprises in the MOB_NBR-ADV message, then retrieve the DCD/UCD information of each candidate TBS successively, and by downlink channel descriptor configuration change counter (DCD Configuration Change Count, DCDCCC)/uplink channel descriptor configuration change counter (UCD Configuration Change Count, UCD CCC) indicate the DCD/UCD information of each candidate TBS whether variation has taken place, if variation has taken place, just go to resolve the follow-up corresponding information content, for example, (this TLV Encoded Neighbor information is general reference to resolve TLV Encoded Neighbor information, previously described DCD/UCD setting is wherein a kind of), if do not change, then terminal need not to resolve TLV Encoded Neighbor information.
In putting into practice prior art, regulation according to agreement, have only the DCD/UCD information content of TBS and SBS or with the DCD/UCD information content of previous NBS not simultaneously, SBS just can be put into the DCD/UCD information content of TBS among the TLV of DCD/UCD Setting of MOB_NBR-ADV message and issue.For certain adjacent area is arranged among the SBS, and the situation of this adjacent area not among the TBS, according to the description of existing protocol, SBS is that the TLV of DCD/UCD information correspondence that can this adjacent area is put among the DCD/UCD Setting of MOB_NBR-ADV message and issues.After that MS receives MOB_NBR-ADV, according to the regulation of existing protocol, MS can think that there be the TLV identical with SBS in TBS by mistake, and can not think that there is not this TLV in TBS, cause the MS resolving resource error code to occur thus, and further cause to switch and network failure or fall communication failure such as net.
Summary of the invention
Method and terminal that the embodiment of the invention provides a kind of terminal to switch network successfully to guarantee to switch.
On the one hand, the method that the embodiment of the invention provides a kind of terminal to switch, described method comprises: switch to from serving BS the process of target BS in terminal, terminal receives the downlink channel descriptor DCD/ uplink channel descriptor UCD broadcast that described target BS sends; The DCD/UCD information content in the DCD/UCD broadcast that the described target BS that terminal parses receives for the first time sends, and according to the DCD/UCD information content that parses new terminal self the DCD/UCD information content of preserving more; The described DCD/UCD information content after the terminal utilization is upgraded switches to described target BS.
On the other hand, the embodiment of the invention provides a kind of terminal, and described terminal comprises: memory cell, the DCD/UCD information content that is used for preserving target BS; Receiving element is used in the process that switches to described target BS from serving BS, receives the downlink channel descriptor DCD/ uplink channel descriptor UCD broadcast that described target BS sends; Resolution unit, the DCD/UCD information content of the DCD/UCD broadcast that the described target BS that receives for the first time for the described receiving element of parsing sends; Updating block is used for upgrading according to the DCD/UCD information content that resolution unit parses the DCD/UCD information content of the described target BS that described memory cell preserves; Switch unit switches to described target BS for the DCD/UCD information content after the described renewal that utilizes described memory cell to preserve.
Technique scheme has following beneficial effect: because adopt terminal to force to resolve the DCD/UCD information content that receives from target BS for the first time, make terminal in handoff procedure, can obtain the technological means of the DCD/UCD information of correct target BS, make terminal obtain correct DCD/UCD message so reached, to avoid causing communication failure such as error code, guarantee to switch and network successfully.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the method flow diagram that a kind of terminal of the embodiment of the invention is switched;
Fig. 2 is a kind of terminal structure schematic diagram of the embodiment of the invention;
Fig. 3 is the another kind of terminal structure schematic diagram of the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
In the prior art, one or more adjacent areas that comprise for SBS and TBS does not comprise the situation of these one or more adjacent areas, according to existing protocol, SBS when sending MOB_NBR-ADV message be can be with this TLV of one or more adjacent areas correspondence be put among the DCD/UCD Setting of MOB_NBR-ADV message and issue.After MS received MOB_NBR-ADV, MS can think that TBS has the adjacent area identical with SBS by mistake, and can not think that there are not this one or more adjacent areas in TBS.After MS switches to TBS, because DCD CCC/UCD CCC does not change, even the DCD/UCD broadcast that TBS sends is received in the back, also can not carry out the renewal of the DCD/UCD information content of adjacent area.MS can not cause continuing error code according to the DCD/UCD information content resolving resource of TBS reality thus always with the TLV of the SBS TLV as TBS, causes to switch to network failure or fall communication failure such as net.
For example, for up public area among the UCD, may there be certain public area in the TBS that has, but SBS can not be put into the TLV of this public area correspondence among the DCD/UCD Setting of MOB_NBR-ADV message to be handed down to MS's, after MS receives MOB_NBR-ADV message, discovery does not change about the DCD CCC/UCD CCC of this public area, takes for the TBS existence and follows the same public area of SBS, causes thus mistake is also followed in the parsing of data.
For this reason, the present invention provides corresponding solution by following examples.
Embodiment one
As shown in Figure 1, be the method flow diagram that a kind of terminal of the embodiment of the invention is switched, described method comprises:
101, switch to from SBS the process of TBS in terminal, terminal receives downlink channel descriptor (DCD)/uplink channel descriptor (UCD) broadcast that described TBS sends.
102, the DCD/UCD information content in the DCD/UCD broadcast that sends of the described TBS that receives for the first time of terminal parses, and according to the DCD/UCD information content that parses new terminal self the DCD/UCD information content of preserving more.
103, the described DCD/UCD information content after the terminal utilization is upgraded switches to described TBS.
Comprise DCD CCC/UCD CCC in the DCD/UCD broadcast that TBS sends in the above-mentioned steps 101, whether the DCD/UCD information content that this DCDCCC/UCD CCC is used to indicate TBS changes, if the DCD/UCD information content of TBS does not change, the value of side DCD CCC/UCD CCC remains unchanged; If when the DCD/UCD information content of TBS changed, then the value of DCD CCC/UCD CCC added 1.
Optionally, may further include after above-described embodiment step 101: terminal is obtained the DCD CCC/UCD CCC in the DCD/UCD broadcast that the described TBS that receives the described first time sends, and the DCD CCC/UCD CCC of the TBS that preserves with described terminal self compares; No matter the DCD CCC/UCD CCC of the TBS that preserves of the DCD CCC/UCDCCC and described terminal self in the described DCD/UCD broadcast is identical or different, all carry out described terminal parses and go out the DCD/UCD information content in the described DCD/UCD broadcast, and according to the DCD/UCD information content that the parses step of new terminal self the DCD/UCD information content of preserving more.
Alternatively, described terminal is after switching to TBS, for receiving for the first time the DCD/UCD broadcast of receiving after the DCD/UCD broadcast of TBS, only the DCD CCC/UCD CCC of the DCD CCC/UCD CCC in the DCD/UCD broadcast and terminal preservation is not simultaneously, terminal just can parse the DCD/UCD information content in the described DCD/UCD broadcast, and the DCD/UCD information content of preserving according to the renewal that parses the DCD/UCD information content self.
The embodiment of the invention forces to resolve the DCD/UCD information content that receives from TBS for the first time by terminal, make terminal in handoff procedure, can obtain the DCD/UCD information of correct TBS, and utilize the DCD/UCD information content of correct TBS to remove resolving resource, reduce communication failures such as error code thus, improved switching networking success rate.
Embodiment two
The embodiment of the invention two provides a kind of terminal, as shown in Figure 2, is a kind of terminal structure schematic diagram of the embodiment of the invention, and described terminal comprises:
Receiving element 21 is used in the process that switches to TBS from serving BS SBS, receives the downlink channel descriptor DCD/ uplink channel descriptor UCD broadcast that described TBS sends;
Updating block 23, the DCD/UCD information content of the TBS that the DCD/UCD information content updated stored unit 20 that is used for parsing according to resolution unit 22 is preserved;
Switch unit 24 switches to described TBS for the DCD/UCD information content after the described renewal that utilizes described memory cell 20 to preserve.
Alternatively, the function of said memory cells 20, resolution unit 22, updating block 23 and switch unit 24 also can be integrated in the processor.
Optionally, as shown in Figure 3, be the another kind of terminal structure schematic diagram of the embodiment of the invention, said memory cells 20 in the present embodiment, can be further used for preserving the DCD CCC/UCD CCC of TBS, described terminal is except comprising above-mentioned five unit, can further include: comparing unit 25, be used for after described receiving element 21 receives the DCD/UCD broadcast of described TBS transmission, described terminal is obtained the DCD CCC/UCD CCC in the DCD/UCD broadcast that described receiving element 21 receives for the first time, and with memory cell 20 in the DCD CCC/UCD CCC of the TBS that preserves compare; Described resolution unit 22, it is identical or different with the DCD CCC/UCD CCC of the TBS that preserves in the DCD CCC/UCD CCC in the described DCD/UCD broadcast and the described memory cell 20 to be further used for described comparing unit no matter, all resolve the DCD/UCD information content in the described DCD/UCD broadcast that described TBS that described receiving element 21 receives for the first time sends, described updating block 23 is according to the DCD/UCD information content of preserving in the DCD/UCD information content updated stored unit that parse.Whether the DCD/UCD information content that described DCD CCC/UCD CCC is used to indicate TBS changes.
Alternatively, the function of above-mentioned comparing unit 25 can be integrated in the function of memory cell 20, resolution unit 22, updating block 23, switch unit 24 in the processor.
Optionally, described terminal also comprises an information change unit, and this information change unit is used for when the DCD/UCD of the TBS information content does not change, and keeps the value of the 20 DCD CCC/UCD CCC that preserve in the memory cell to remain unchanged; When the DCD/UCD of the TBS information content changes, the value of the DCD CCC/UCD CCC that preserves in the memory cell 20 is added 1.Described resolution unit 22, be further used for described terminal after switching to TBS, for the DCD/UCD broadcast that receives for the first time the TBS that receives after the DCD/UCD broadcast of TBS transmission at receiving element 21, only the DCDCCC/UCD CCC that preserves in the DCD CCC/UCD CCC in the DCD/UCD broadcast and the memory cell 20 is not simultaneously, just can parse the DCD/UCD information content in the described DCD/UCD broadcast, the DCD/UCD information content that the DCD/UCD information content updated stored unit 20 that described updating block 23 parses according to resolution unit 22 is preserved.
Alternatively, the function of above-mentioned information change unit can be integrated in the function of memory cell 20, receiving element 21, resolution unit 22, updating block 23, switch unit 24 in the processor.
The embodiment of the invention forces to resolve the DCD/UCD information content that receives from TBS for the first time by terminal, make terminal in handoff procedure, can obtain the DCD/UCD information of correct TBS, and utilize the DCD/UCD information content of correct TBS to remove resolving resource, reduce communication failures such as follow-up error code thus, improved switching networking success rate.
One of ordinary skill in the art will appreciate that all or part of step that realizes in above-described embodiment method is to instruct related hardware to finish by program, described program can be stored in the computer read/write memory medium, this program is when carrying out, comprise above-mentioned all or part of step, described storage medium, as: ROM/RAM, disk, CD etc.
Above-described embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is the specific embodiment of the present invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. the method switched of a terminal is characterized in that described method comprises:
Switch to from serving BS the process of target BS in terminal, terminal receives the downlink channel descriptor DCD/ uplink channel descriptor UCD broadcast that described target BS sends;
Terminal is obtained the downlink channel descriptor configuration change counter DCD CCC/ uplink channel descriptor configuration change counter UCD CCC in the DCD/UCD broadcast that the described target BS that receives for the first time sends, and the DCD CCC/UCD CCC of the target BS of preserving with described terminal self compares;
No matter the DCD CCC/UCD CCC of the target BS preserved of the DCD CCC/UCD CCC and described terminal self in the described DCD/UCD broadcast is identical or different, all carry out described terminal parses and go out the DCD/UCD information content in the described DCD/UCD broadcast, and according to the DCD/UCD information content that the parses step of new terminal self the DCD/UCD information content of preserving more;
The described DCD/UCD information content after the terminal utilization is upgraded switches to described target BS.
2. the method for claim 1, it is characterized in that, whether the DCD/UCD information content that described DCD CCC/UCD CCC is used to indicate target BS changes, if the DCD/UCD information content of target BS does not change, then the value of DCD CCC/UCD CCC remains unchanged; If the DCD/UCD information content of target BS changes, then the value of DCD CCC/UCD CCC adds 1.
3. the method for claim 1, it is characterized in that, described terminal is after switching to target BS, for the DCD/UCD broadcast of after the DCD/UCD broadcast that receives for the first time the target BS transmission, receiving, only the DCD CCC/UCD CCC of the DCD CCC/UCD CCC in the DCD/UCD broadcast and terminal preservation is not simultaneously, terminal just can parse the DCD/UCD information content in the described DCD/UCD broadcast, and upgrades the DCD/UCD information content of self preserving according to the DCD/UCD information content that parses.
4. a terminal is characterized in that, described terminal comprises:
Memory cell, the DCD/UCD information content that is used for preserving target BS; Be further used for preserving the downlink channel descriptor configuration change counter DCD CCC/ uplink channel descriptor configuration change counter UCDCCC of target BS;
Receiving element is used in the process that switches to described target BS from serving BS, receives the downlink channel descriptor DCD/ uplink channel descriptor UCD broadcast that described target BS sends;
Comparing unit, be used for after described receiving element receives the DCD/UCD broadcast of described target BS transmission, obtain the DCD CCC/UCD CCC in the DCD/UCD broadcast that described receiving element receives for the first time, and with described memory cell in the DCD CCC/UCD CCC of the target BS preserved compare;
Resolution unit, being used for described comparing unit no matter is identical or different with the result that the DCD CCC/UCD CCC of the target BS preserved in the DCD CCC/UCD CCC of described DCD/UCD broadcast and the described memory cell compares, and all resolves the DCD/UCD information content in the DCD/UCD broadcast of the described target BS transmission that described receiving element receives for the first time;
Updating block is used for upgrading according to the DCD/UCD information content that resolution unit parses the DCD/UCD information content of the described target BS that described memory cell preserves;
Switch unit switches to described target BS for the DCD/UCD information content after the described renewal that utilizes described memory cell to preserve.
5. terminal as claimed in claim 4, it is characterized in that, described terminal also comprises an information change unit, and described information change unit is used for when the DCD/UCD of the target BS information content does not change, and the value of the DCD CCC/UCD CCC that preserves in the maintenance memory cell is constant; Change in the DCD/UCD of the target BS information content, the value of the DCD CCC/UCD CCC that preserves in the memory cell is added 1.
6. terminal as claimed in claim 4, it is characterized in that, described resolution unit, be further used for after described terminal switches to target BS, receive the DCD/UCD broadcast of receiving after the DCD/UCD broadcast of target BS transmission for the first time for receiving element, only the DCD CCC/UCD CCC that preserves in the DCD CCC/UCD CCC in the DCD/UCD broadcast and the memory cell just can parse the DCD/UCD information content in the described DCD/UCD broadcast not simultaneously;
Described updating block is used for upgrading the DCD/UCD information content that described memory cell is preserved according to the DCD/UCD information content that resolution unit parses.
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| WO2014190474A1 (en) * | 2013-05-27 | 2014-12-04 | 华为技术有限公司 | Mobility management method, device and system |
| CN106162762B (en) * | 2015-03-27 | 2019-07-02 | 中国移动通信集团山西有限公司 | A kind of method and device of determining switching timing time |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1805602A (en) * | 2005-01-10 | 2006-07-19 | 华为技术有限公司 | Method of implementing switching mobile station to target base station |
| CN101516118A (en) * | 2008-02-21 | 2009-08-26 | 中兴通讯股份有限公司 | Data communication method |
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| WO2006071096A1 (en) * | 2004-12-30 | 2006-07-06 | Lg Electronics Inc. | A method of updating channel information by a mobile station that is in power saving mode |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1805602A (en) * | 2005-01-10 | 2006-07-19 | 华为技术有限公司 | Method of implementing switching mobile station to target base station |
| CN101516118A (en) * | 2008-02-21 | 2009-08-26 | 中兴通讯股份有限公司 | Data communication method |
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