CN101222751A - Subscriber terminal, base station and independent descending carrier configuration information transmission method and system - Google Patents
Subscriber terminal, base station and independent descending carrier configuration information transmission method and system Download PDFInfo
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Abstract
The invention relates to a user terminal, a base station and a method for transmitting single downlink carrier wave configuration information and a system thereof in the communication technical field. In the process of switching or after the switching between cells and according to a request of the user terminal, specialized carrier wave configuration information sent by a target base station is delivered to the user terminal by the base station. The specialized carrier wave configuration information is sent to the user terminal by a source base station belonging to a cell which the user terminal originally is in or by a target base station belonging to a cell that the user terminal is to enter. When the user terminal conducts switching between the cells in a connecting state, the invention can smoothly receive the multimedia multicast broadcasting services of the target base station and solve the problems that the specialized carrier wave configuration information is not received in the user terminal processing and connecting state in the prior technical proposal.
Description
Technical field
The present invention relates to communication technique field, relate in particular to a kind of user terminal, base station and independent descending carrier configuration information transmission method and system.
Background technology
MBMS (multimedia multicast broadcasting) business is that the point-to-multipoint service of a data source to a plurality of users send data is provided in mobile communications network, is used to realize that Internet resources are shared, raising utilization rate of network resource, the interface resource of especially eating dishes without rice or wine.MBMS can not only realize the classes of messages multicast and the broadcasting of plain text low rate, and can also realize the multicast and the broadcasting of high-speed multimedia business.
In current WCDMA (Wideband Code Division Multiple Access (WCDMA)) version, MBMS has had quite perfect flow process, but the MBMS efficiency of transmission among the WCDMA is lower, especially is not suitable for transmission such as high speed multimedia streaming datas such as mobile TVs.
For this MBMS business of more effective support, industry proposes to use special carrier to support the MBMS business, particularly the high speed business of TV class.The characteristics of special carrier are: in this carrier wave on MBMS transmission business, relevant unicast service does not transmit.Under some scene, special carrier does not have special ascending physical signal resource, and this have only the scene of downlink resource to be called independent descending carrier.
In order to reduce the time of UE (user terminal) search special carrier, in general communication network, transmit some DC-CFG (configuration information of special carrier), after the user obtains described DC-CFG information, can receive the programme information that transmits on the special carrier fast.Described DC-CFG information generally includes: access technology, Frequency point, lock in time, associated frame structural parameters etc.
Can both receive the configuration information of special carrier for the user terminal that makes all states, common way is: with this message with broadcasting form in general transmitted over communications networks, as broadcasting on BCCH (broadcast channel), all UE on this sub-district can both receive.
The such scheme shortcoming is that the UE (User Equipment) of low ability reads the information less than broadcast channel when connection status, may cause the user can not receive special carrier information.
The signal that causes this reason as shown in Figure 1,
UE is idle condition at T1 constantly, and before T1, UE can read the configuration information (as reading) of special carrier from the broadcast channel of C1 or C2 from the broadcast channel of clean culture sub-district.
T1 constantly after, UE has entered connection status (carrying out communication process), CELL_DCH state for example, along with moving of UE, UE moves to the DC zone 2 from DC zone 1, a simple UE switching flow as shown in Figure 2:
The first step: user terminal UE sends handoff request according to the result who measures to source Node B (base station under the sub-district, the former place of user terminal).
Second step: source Node B and target Node B (base station under the sub-district that user terminal is about to enter) hold consultation, and target Node B informs source Node B with relevant access parameter.
The 3rd step: source Node B sends switching command according to negotiation result to UE.And the access parameter of target Node B informed UE
The 4th step: UE connects with target Node B according to access parameter and is connected with source Node B disconnection.
For the UE of WCDMA, when being in the CELL_DCH state, the UE of low ability can not read the information on the broadcast channel, therefore can not obtain the configuration information in DC zone 2 from the clean culture sub-district; For the UE of GSM, all UE can not read the information on the broadcast channel, therefore can not obtain the configuration information in DC zone 2 from the clean culture sub-district.
In the T2 moment, UE prepares to receive the business under the special carrier, but this moment, UE did not have the relevant configuration information in DC zone 2, thereby causes UE to receive the operational difficulty of MBMS.
Summary of the invention
The embodiment of the invention provides a kind of user terminal, base station and independent descending carrier configuration information transmission method and system, has solved user terminal in the prior art scheme carries out not receiving after switch the minizone special carrier configuration information under connection status problem.
Embodiment of the invention implementation is as follows:
The embodiment of the invention provides a kind of independent descending carrier configuration information transmission method, comprising:
Described user terminal according to the request of user terminal, is handed down to the special carrier configuration information of target BS in the base station after user terminal carries out in the handoff procedure of minizone or switches.
The embodiment of the invention provides a kind of user terminal, comprising:
Switching device shifter is used to carry out cell handover operations;
Special carrier configuration request module is used for carrying out handoff procedure or carrying out switching back transmission special carrier configuration request message at described switching device shifter;
Special carrier configuration information receiver module is used to receive the special carrier configuration information.
The embodiment of the invention provides a kind of base station, comprising:
Special carrier configuration information receiver module in described base station during as source base station, is used for the special carrier configuration information of the target BS that the receiving target base station sends;
The special carrier configuration information issues module one, is used to issue the special carrier configuration information of the target BS that described special carrier configuration information receiver module received.
The embodiment of the invention provides a kind of base station, comprising:
Special carrier configuration information receiver module in described base station during as source base station, is used for the special carrier configuration information of the target BS that the receiving target base station sends;
Special carrier configuration information comparison module, whether be used for before issuing the special carrier configuration information under the sub-district before and after relatively user terminal switches the special carrier configuration information of base station identical;
The special carrier configuration information issues module two, when the special carrier configuration information of base station is inequality under the sub-district before and after described user terminal switches, sends the information of this part inequality to user terminal.
The embodiment of the invention provides a kind of independent descending carrier configuration information transmission system, comprises at least one user terminal and at least two base stations, and described user terminal is provided with:
Switching device shifter is used to carry out cell handover operations;
Special carrier configuration request module, in described base station during as source base station, be used for carrying out handoff procedure and send special carrier configuration request message to described base station at described switching device shifter, perhaps, in described base station during, be used for carrying out and switch the back and send special carrier configuration request message to described base station at described switching device shifter as target BS;
Special carrier configuration information receiver module is used to receive the special carrier configuration information that described base station sends;
Described base station is provided with:
Special carrier configuration information receiver module in described base station during as source base station, is used for the special carrier configuration information of the target BS that the receiving target base station sends;
The special carrier configuration information issues module one, is used to issue the special carrier configuration information of the target BS that described special carrier configuration information receiver module received.
The embodiment of the invention provides a kind of independent descending carrier configuration information transmission system, comprises at least one user terminal and at least two base stations, and described user terminal is provided with:
Switching device shifter is used to carry out cell handover operations;
Special carrier configuration request module is used for carrying out handoff procedure at switching device shifter and sends special carrier configuration request message.
Special carrier configuration information receiver module is used to receive the special carrier configuration information;
Described base station is provided with:
Special carrier configuration information receiver module in described base station during as source base station, is used for the special carrier configuration information of the target BS that the receiving target base station sends;
Special carrier configuration information comparison module, whether be used for before issuing the special carrier configuration information under the sub-district before and after relatively user terminal switches the special carrier configuration information of base station identical;
The special carrier configuration information issues module two, when the special carrier configuration information of described target BS and described source base station is inequality, sends the information of this part inequality to described user terminal.
The technical scheme that is provided by the invention described above embodiment as can be seen, the embodiment of the invention has realized that user terminal UE is in carrying out the minizone handoff procedure, by Node B the special carrier configuration information that sends in the target BS is transferred to UE, thereby UE can be carried out after the minizone switches, smoothly the MBMS business of receiving target base station under connection status.
Description of drawings
Fig. 1 is that the professional schematic diagram of reception MBMS is switched in prior art UE minizone;
Fig. 2 carries out minizone switching flow figure for prior art UE;
Fig. 3 is the method for the invention embodiment one flow chart;
Fig. 4 is the method for the invention embodiment two flow charts;
Fig. 5 is a kind of embodiment module diagram of system of the present invention.
Embodiment
In embodiments of the present invention, user terminal UE is in carrying out the minizone handoff procedure or after switching, by Node B the special carrier configuration information of target Node B is transferred to UE, UE can be carried out after the minizone switches, smoothly the MBMS business of receiving target base station under connection status.
The configuration information of described special carrier can be transferred to UE or be transferred to UE by target Node B by source Node B.
Below in conjunction with accompanying drawing embodiment of the present invention is elaborated.
It is example that the embodiment of the invention one is transferred to UE with the special carrier configuration information by source Node B, the special carrier configuration information that is described target Node B is carried out being handed down to UE's in the handoff procedure of minizone at UE by source Node B, its specific implementation process comprises the steps: as shown in Figure 3
Step 1: user terminal sends handoff request according to the result who measures to source Node B, and carries the message of the DC-CFG information of request target Node B.
Described DC-CFG message can be carried in the described handoff request, perhaps sends to source Node B with independent request command by dedicated channel.
Step 2: source Node B holds consultation with target Node B after receiving described request message, and target Node B sends to source Node B with the information about DC-CFG among relevant access parameter and the target Node B.
Described source Node B and target Node B negotiations process, promptly both whether compare DC-CFG information different, and need to determine the DC-CFG information that sends.A kind of embodiment correlation step of concrete negotiations process is as follows:
Step 21: source Node B sends the DC-CFG request message to target Node B, and the identifier and the DC-CFG information of described special carrier in the Node B of source of carrying special carrier in described request message;
Step 22: target Node B compares with DC-CFG information of oneself storing and the DC-CFG information in the request message, if find to have different information, then sends information inequality to source Node B, and described DC-CFG information situation inequality comprises:
Situation 1: identical special carrier (as identical PLMN (public land mobile network) ID), different configurations;
Situation 2: have new special carrier (as new PLMN ID is arranged among the target Node B).
If the DC-CFG information that sends is identical, then target Node B can be according to not sending described DC-CFG information to source Node B with the agreement of source Node B in advance, this moment, source Node B can know with the described DC-CFG information of target Node B identically, perhaps only sent the identical information of expression to source Node B.
The process of the DC-CFG information that above-mentioned negotiation determine to need sends is in order to reduce unnecessary transmission, and in its actual mechanical process, its target Node B can directly all send to source Node B with its DC-CFG information.
Step 3: source Node B sends switching command according to negotiation result to UE, and the access parameter of target Node B and the DC-CFG information of target Node B are sent to UE.
In order to reduce some unnecessary transmission, source Node B can compare with the DC-CFG information that target Node B sends over.If identical, then Node B in source does not send described DC-CFG information to UE, shows that in the reason that does not send two Node B send identical DC-CFG information.If two DC-CFG information have the part difference, can only transmit different parts.If carried out the comparison of DC-CFG information in the negotiations process of aforementioned source Node B and target Node B, then source NodeB no longer compares herein.
Described DC-CFG transmission of Information can be placed on to be transmitted in the switching command or transmits on dedicated channel with independent message.
Step 4:UE connects according to access parameter and target Node B, and is connected with source Node B disconnection.
UE is after being linked into target Node B, according to the DC-CFG message pick-up MBMS business of target Node B.
It is example that the embodiment of the invention two is transferred to UE with the special carrier configuration information by target Node B, the special carrier configuration information that is described target Node B is carried out being handed down to UE after switch the minizone at UE by target Node B, its specific implementation process comprises the steps: as shown in Figure 4
Step 1: user terminal UE sends handoff request according to the result who measures to source Node B.
Step 2: source Node B and target Node B hold consultation, and target Node B sends to source Node B with relevant access parameter.
Step 3: source Node B sends switching command according to negotiation result to UE, and the access parameter of target Node B is sent to UE.
Step 4:UE connects according to access parameter and target Node B, and is connected with source Node B disconnection.
Step 5:UE is to target Node B request DC-CFG information.
During UE request DC-CFG message, one's own DC-CFG information (perhaps information index) can be reported target Node B simultaneously.
Step 6: target Node B sends DC-CFG information to UE.
In order to reduce some unnecessary transmission, after UE reports target Node B with one's own DC-CFG information (perhaps information index), more whether target Node B can send identical DC-CFG information with source Node B, if it is identical, then target Node B does not send DC-CFG information to UE, shows that in the reason that does not send two Node B send identical DC-CFG information.If two DC-CFG information have the part difference, can only transmit different parts.
UE can send the message of the DC-CFG information of request target Node B in the foregoing description two to source Node B transmission handoff request message the time, and target Node B sends the DC-CFG information of described target Node B to UE after the UE switching is finished.After one's own DC-CFG information (perhaps information index) can being reported target Node B equally in the time of the DC-CFG information of described request target Node B, compare by target Node B, and carry out above-mentioned different transmit operation according to comparative result.
Embodiment three provided by the invention is applied to the LTE system with described method: its solution is transmitted in the switching for described DC-CFG information is not be used in, and transmits but be placed in time broadcast channel.Can reduce the load of main broadcast channel like this.
The embodiment of the invention four provides a kind of independent descending carrier configuration information transmission system, and described system comprises a plurality of user terminals and base station.As shown in Figure 5, described user terminal is provided with:
Switching device shifter is used to carry out cell handover operations;
Special carrier configuration request module is used for carrying out handoff procedure or switching back transmission special carrier configuration request message at switching device shifter;
Special carrier configuration information receiver module is used to receive the special carrier configuration information;
Described base station is provided with:
Special carrier configuration information receiver module during as source base station, is used for the target BS special carrier configuration information that the receiving target base station sends in described base station;
The special carrier configuration information issues module one, is used to issue the special carrier configuration information of the target BS that described special carrier configuration information receiver module received.
The embodiment of the invention five provides a kind of independent descending carrier configuration information transmission system, and the difference of described system and embodiment four only is that described base station is provided with:
Special carrier configuration information receiver module during as source base station, is used for the target BS special carrier configuration information that the receiving target base station sends in described base station;
Special carrier configuration information comparison module, whether be used for before issuing the special carrier configuration information under the sub-district before and after relatively user terminal switches the special carrier configuration information of base station identical;
The special carrier configuration information issues module two, when the special carrier configuration information of target BS and source base station is identical, show the information that target BS is identical with the special carrier configuration information of source base station to the user terminal transmission, when the special carrier configuration information of target BS and source base station is inequality, send the information of this part inequality to user terminal.
Embodiment five is under the situation that special carrier configuration information comparison module is set, if target BS is identical with the DC-CFG information of source base station, then DC-CFG information issues module and does not send concrete DC-CFG information to UE, only transmission shows the information that target BS is identical with the DC-CFG information of source base station, perhaps according to not sending DC-CFG information with making an appointment of source base station.If two DC-CFG information have different piece, then DC-CFG information issues module and can only send different parts.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (15)
1. an independent descending carrier configuration information transmission method is characterized in that, comprising:
Described user terminal according to the request of user terminal, is handed down to the special carrier configuration information of target BS in the base station after user terminal carries out in the handoff procedure of minizone or switches.
2. the method for claim 1 is characterized in that, described special carrier configuration information is handed down to user terminal by the source base station under the sub-district at the original place of user terminal.
3. method as claimed in claim 2 is characterized in that, the described method that issues the special carrier configuration information by source base station specifically comprises:
Described user terminal transmission handoff request and special carrier configuration request are to described source base station;
Described source base station and described target BS are consulted, and described target BS sends to described source base station with the special carrier configuration information of described target BS;
Described source base station is given described user terminal according to the special carrier configuration information that negotiation result issues switching command and described target BS.
4. method as claimed in claim 3 is characterized in that, after described source base station received the special carrier configuration information of described target BS, described method further comprised:
Whether described source base station relatively oneself special carrier configuration information is identical with the special carrier configuration information of described target BS, if all different or part is different, the information that then sends switching command and described different piece is to described user terminal.
5. method as claimed in claim 2 is characterized in that, the described method that issues the special carrier configuration information by source base station specifically comprises:
Described user terminal transmission handoff request and special carrier configuration request are to described source base station;
Described source base station and described target BS are consulted, whether described target BS relatively oneself special carrier configuration information is identical with the special carrier configuration information of described source base station, when or part all different with the special carrier information of described source base station not simultaneously, the information of different piece is sent to described source base station;
Described source base station is given described user terminal according to the information that negotiation result issues switching command and described different piece.
6. as claim 3,4 or 5 described methods, it is characterized in that the method that described user terminal sends the special carrier configuration request comprises:
In described handoff request, carry described special carrier configuration request; Or
Send described special carrier configuration request with independent order.
7. as claim 3,4 or 5 described methods, it is characterized in that described source base station transmission special carrier configuration information comprises to the method for user terminal:
In described switching command, carry described special carrier configuration information; Or
Send described special carrier configuration information with independent order.
8. the method for claim 1 is characterized in that, described special carrier configuration information is handed down to user terminal by described target BS.
9. method as claimed in claim 8 is characterized in that, the method that described target BS issues described special carrier configuration information specifically comprises:
After described user terminal and described target BS connected, described user terminal sent the special carrier configuration information of target BS to described target base station requests;
Described target BS sends the special carrier configuration information of described target BS to described user terminal.
10. method as claimed in claim 8 is characterized in that, the method that described target BS issues described special carrier configuration information specifically comprises:
After described user terminal and described target BS connected, described user terminal sent the special carrier configuration information of target BS to described target base station requests, and reported the special carrier configuration information of described source base station to described target BS;
Whether the special carrier configuration information of the more described target BS of described target BS is identical with the special carrier configuration information of described source base station, and sends the information of described different piece under the situation that all difference or part are different.
11. a user terminal is characterized in that, comprising:
Switching device shifter is used to carry out cell handover operations;
Special carrier configuration request module is used for carrying out handoff procedure or carrying out switching back transmission special carrier configuration request message at described switching device shifter;
Special carrier configuration information receiver module is used to receive the special carrier configuration information.
12. a base station is characterized in that, comprising:
Special carrier configuration information receiver module in described base station during as source base station, is used for the special carrier configuration information of the target BS that the receiving target base station sends;
The special carrier configuration information issues module one, is used to issue the special carrier configuration information of the target BS that described special carrier configuration information receiver module received.
13. a base station is characterized in that, comprising:
Special carrier configuration information receiver module in described base station during as source base station, is used for the special carrier configuration information of the target BS that the receiving target base station sends;
Special carrier configuration information comparison module, whether be used for before issuing the special carrier configuration information under the sub-district before and after relatively user terminal switches the special carrier configuration information of base station identical;
The special carrier configuration information issues module two, when the special carrier configuration information of base station is inequality under the sub-district before and after described user terminal switches, sends the information of this part inequality to user terminal.
14. an independent descending carrier configuration information transmission system is characterized in that, comprises at least one user terminal and at least two base stations, described user terminal is provided with:
Switching device shifter is used to carry out cell handover operations;
Special carrier configuration request module, in described base station during as source base station, be used for carrying out handoff procedure and send special carrier configuration request message to described base station at described switching device shifter, perhaps, in described base station during, be used for carrying out and switch the back and send special carrier configuration request message to described base station at described switching device shifter as target BS;
Special carrier configuration information receiver module is used to receive the special carrier configuration information that described base station sends;
Described base station is provided with:
Special carrier configuration information receiver module in described base station during as source base station, is used for the special carrier configuration information of the target BS that the receiving target base station sends;
The special carrier configuration information issues module one, is used to issue the special carrier configuration information of the target BS that described special carrier configuration information receiver module received.
15. an independent descending carrier configuration information transmission system is characterized in that, comprises at least one user terminal and at least two base stations, described user terminal is provided with:
Switching device shifter is used to carry out cell handover operations;
Special carrier configuration request module is used for carrying out handoff procedure at switching device shifter and sends special carrier configuration request message.
Special carrier configuration information receiver module is used to receive the special carrier configuration information;
Described base station is provided with:
Special carrier configuration information receiver module in described base station during as source base station, is used for the special carrier configuration information of the target BS that the receiving target base station sends;
Special carrier configuration information comparison module, whether be used for before issuing the special carrier configuration information under the sub-district before and after relatively user terminal switches the special carrier configuration information of base station identical;
The special carrier configuration information issues module two, when the special carrier configuration information of described target BS and described source base station is inequality, sends the information of this part inequality to described user terminal.
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| CN101742584A (en) * | 2008-11-24 | 2010-06-16 | 华为技术有限公司 | Method, system and equipment for handover among base stations |
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| CN100353806C (en) * | 2004-04-01 | 2007-12-05 | 大唐移动通信设备有限公司 | Relay switch-over method in TD-SCDMA mobile communication system |
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