CN103200634A - Method and device of inter-cell switching - Google Patents
Method and device of inter-cell switching Download PDFInfo
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- CN103200634A CN103200634A CN2012100020557A CN201210002055A CN103200634A CN 103200634 A CN103200634 A CN 103200634A CN 2012100020557 A CN2012100020557 A CN 2012100020557A CN 201210002055 A CN201210002055 A CN 201210002055A CN 103200634 A CN103200634 A CN 103200634A
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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
- H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
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Abstract
The invention discloses a method, a device and a system of inter-cell switching and relates to the field of communications. The method, the device and the system of the inter-cell switching are used for solving the problem that device-to-device (D2D) communication is interrupted when user equipment carrying out the D2D communication is switched to an adjacent cell. The method includes the following steps: a first set of user equipment submits a measurement report to a source base station, and the measurement report is used for judging whether the first set of user equipment and a second set of user equipment which directly carry out D2D communication among the equipment at present can be switched to a target cell synchronously by the source base station; and when a switching command is received, the first set of user equipment is switched to the target cell from a source cell belonging to the source base station and continues to carry out D2D communication with the second set of user equipment. The method, the device and the system of the inter-cell switching are applicable to the field of communications and used for achieving the inter-cell switching of the D2D communication.
Description
Technical field
The present invention relates to the communications field, relate in particular to method and the device that switch a kind of minizone.
Background technology
In traditional cellular mobile communication networks, UE (User Equi pment, need pass through the base station centralized control when communicating subscriber equipment), by the base station Radio Resource in the residential quarter is dispatched, the user data that UE sends arrives core net by the base station, send to the base station at object UE place then, last base station by the object UE place again sends to object UE with this user data.
In traditional cellular network, even when communicating between the very near UE of two distances, user data also needs through base station and core net.But along with developing rapidly of cellular network, the network capacity in a lot of areas is near saturated.In order to alleviate the load of grand network, can adopt D2D (Device to Device, the equipment room direct communication) technology, in the D2D technology, user data directly is transferred to another UE from a UE, without base station and core net, can directly set up communication between two or more UE of close together, alleviate the load of grand network, save Radio Resource.
Because that is that all right is ripe for present D2D technology, only is supported between the two or more UE in the same residential quarter and communicates; When two or more UE switch to another residential quarter simultaneously, can cause the D2D communication disruption between UE.
Summary of the invention
Method and device that embodiments of the invention provide a kind of minizone to switch can make the UE that is under the D2D communications status switch to Target cell simultaneously and keep current D2D communication.
For achieving the above object, embodiments of the invention adopt following technical scheme:
On the one hand, the method that the embodiment of the invention provides a kind of minizone to switch comprises:
First subscriber equipment is to the source base station reporting measurement reports, and described measurement report is used for whether can switching to Target cell synchronously for current described first subscriber equipment and second subscriber equipment that carries out equipment room direct communication D2D communication of described source base station judgement;
When receiving switching command, the cell-of-origin that described first subscriber equipment is subordinated to source base station switches to Target cell, continues to carry out D2D with second subscriber equipment at described Target cell and communicates by letter.
On the other hand, the method that the embodiment of the invention also provides a kind of minizone to switch comprises:
Judge according to first subscriber equipment and the measurement report of second user equipment to report and currently to carry out first subscriber equipment and second subscriber equipment that equipment room direct communication D2D communicates by letter and whether can switch to Target cell synchronously;
When described first subscriber equipment and second subscriber equipment can switch to Target cell synchronously, in described first subscriber equipment and second subscriber equipment at least one sends switching command, indicating described first subscriber equipment and second subscriber equipment to switch to Target cell synchronously, and proceed D2D communication at described Target cell.
On the one hand, the embodiment of the invention also provides a kind of subscriber equipment, comprising again:
Report the unit, be used for to the source base station reporting measurement reports, described measurement report is used for for described source base station judgement current user equipment and carries out second subscriber equipment that equipment room direct communication D2D communicates by letter with current user equipment whether can switch to Target cell synchronously;
Switch unit is used for when receive switching command, switches to Target cell from the cell-of-origin of described source base station, carries out D2D in described Target cell continuation with described second subscriber equipment and communicates by letter.
Another aspect, the embodiment of the invention also provide a kind of base station, comprising:
First processing unit is used for judging according to the measurement report of first user equipment to report whether current first subscriber equipment and second subscriber equipment that carries out equipment room direct communication D2D communication can switch to Target cell synchronously;
Second transmitting element, described first subscriber equipment and second subscriber equipment be used for when can switch to Target cell synchronously, in described first subscriber equipment and second subscriber equipment at least one sends switching command, indicating described first subscriber equipment and described second subscriber equipment to switch to Target cell synchronously, and proceed D2D communication at described Target cell.
Method and the device that switch the minizone that the embodiment of the invention provides send to source base station by the current UE that carries out D2D communication with its examining report; When described examining report satisfied default switching condition, source base station sent switching command to UE and switches to Target cell with indication UE.Compared with prior art, after the method that the embodiment of the invention provides can make that the two or more UE that carry out D2D communication switch to Target cell, the D2D that continues to keep current at Target cell communicated by letter.
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.
The schematic flow sheet of the method that Fig. 1 provides for the embodiment of the invention 1;
The schematic flow sheet of the method that Fig. 2 provides for the embodiment of the invention 2;
The schematic flow sheet of the method that Fig. 3 provides for the embodiment of the invention 3;
The schematic flow sheet of the method that Fig. 4 provides for the embodiment of the invention 4;
The structural representation of the subscriber equipment that Fig. 5-8 provides for the embodiment of the invention 5;
The structural representation of the base station that Fig. 9-11 provides for the embodiment of the invention 6.
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.
Embodiment 1
The method that the embodiment of the invention provides a kind of minizone to switch, as shown in Figure 1, described method comprises:
101, UE1 is to the source base station reporting measurement reports, and described measurement report is used for whether can switching to Target cell synchronously for current UE1 and the UE2 that carries out D2D communication of described source base station judgement.
Concrete, whether described measurement report is used for whether can switching to Target cell and described UE1 and UE2 for described source base station judgement UE1 can switch to Target cell synchronously, described measurement report can comprise the metrical information of UE1 neighbor cell, the metrical information of UE2 neighbor cell, and the path loss information between UE1 and the UE2 etc.
What deserves to be explained is that it is that example describes that the embodiment of the invention is carried out D2D communication with 2 UE, the subscriber equipment that carries out D2D communication in the practical application can be a plurality of, does not do restriction herein.
102, when receiving switching command, the cell-of-origin that UE1 is subordinated to source base station switches to Target cell, continues to carry out D2D with UE2 at described Target cell and communicates by letter.
That is to say, after this UE receives this synchronous switching command, can with carry out another UE that D2D communicates by letter with it and switch to Target cell synchronously.
The method that the embodiment of the invention provides, UE switches to Target cell to the source base station reporting measurement reports when UE receives switching command, and another UE that continues to communicate by letter with the current D2D of carrying out at described Target cell carries out D2D and communicates by letter.Compared with prior art, after the method that the embodiment of the invention provides can make that the UE that carries out D2D communication switches to Target cell, the D2D that continues to keep current at Target cell communicated by letter.
Embodiment 2
The method that the embodiment of the invention provides a kind of minizone to switch, as shown in Figure 2, described method comprises:
201, the measurement report that reports according to UE1 and UE2 of base station judges whether UE1 and UE2 that the current D2D of carrying out communicates by letter can switch to Target cell synchronously.
Concrete, described measurement report can comprise the metrical information of the neighbor cell of the UE that carries out D2D communication, and is carrying out other information such as path loss information between two or more UE of D2D communication, but is not limited only to this.
Concrete, whether the UE whether described UE can switch to Target cell and the current D2D of carrying out communication can be adjudicated according to the measurement report that UE reports in the base station can switch to Target cell synchronously.The base station judges whether the UE of current D2D communication can switch to Target cell simultaneously and can adopt but be not limited to following method:
Whether the UE that judges current D2D communication can switch to Target cell simultaneously, need the measurement report with reference to all UE of current D2D communication, need satisfy current all UE that are in this D2D communication and can both switch to Target cell synchronously, D2D communication can switch to Target cell synchronously.
Worth explanation, described synchronous switching is that two UE switch to identical Target cell in the identical or close time; If switching time, difference was bigger, it then not synchronous switching.The described close time can determine that according to actual application environment it can be less than the Preset Time thresholding by those skilled in the art.For example: base station judgement UE1 can switch to identical Target cell with UE2, send switching command then, the transmitting time difference of two switching commands is little, can be less than certain thresholding, specifically can be arranged by those skilled in the art, thereby UE1 switches to Target cell with UE2 in the identical or close time, and this switching mode is exactly to switch synchronously.If base station judgement UE1 can switch to Target cell, send switching command to UE1, UE1 finishes switching; Judgement UE2 in base station can switch to Target cell then, sends switching command to UE2 again, and it is bigger to cause UE1 and UE2 to switch to time interval of Target cell, does not then belong to synchronous switching.
202, when the described UE1 that is carrying out D2D communication and UE2 can switch to Target cell synchronously, the base station sends switching command at least one UE among described UE1 and the UE1, indicating described UE1 and UE2 to switch to Target cell synchronously, and proceed D2D communication at described Target cell.
What deserves to be explained is that it is that example describes that the embodiment of the invention is carried out D2D communication with 2 UE, the subscriber equipment that carries out D2D communication in the practical application can be a plurality of, does not do restriction herein.
The measurement report that the method that the embodiment of the invention provides, base station send according to the UE that is carrying out D2D communication detects the mobility of this UE; When satisfying switching condition, the base station sends switching command to UE, and the two or more UE that carrying out D2D communication with indication switch to Target cell synchronously.Compared with prior art, after the method that the embodiment of the invention provides can make that the two or more UE that carry out D2D communication switch to Target cell, the D2D that continues to keep current at Target cell communicated by letter.
Embodiment 3
The method that the embodiment of the invention provides a kind of minizone to switch, as shown in Figure 3, described method comprises:
301, carry out D2D communication between the UE of two or more close together.
Concrete, described D2D communication can be voice call, share data or send file etc., but be not limited only to this.
For the ease of understanding, it is that example describes that the embodiment of the invention is carried out D2D communication with 2 UE, and described 2 UE are labeled as UE1 and UE2.What deserves to be explained is that the UE that carries out D2D communication in the practical application is not limited only to 2.
302, UE1 and UE2 communicate by letter to neighbor cell and current D2D respectively and measure, and respectively according to the measurement result reporting measurement reports.
Concrete, described measurement report includes but not limited to: the measurement result of these two UE neighbor cells, and the path loss information between UE1 and the UE2.
Optionally, described measurement report can also comprise UE1 and the residing positional information of UE2.
303, source base station receives the measurement report of UE1 and UE2 transmission, does switch decision according to described measurement report, determines target BS.If the target BS that source base station judgement UE1 and UE2 need switch to is same target BS, need then further to determine whether UE1 and UE2 can switch to Target cell synchronously, and whether the communication of the D2D between UE1 and the UE2 can switch to Target cell etc. synchronously.
Concrete, source base station can wait to adjudicate UE1 and whether UE2 can switch to Target cell synchronously according to the neighbor cell measurement information in the measurement report, D2D metrical information and the residing positional information of UE.For example: if the relative position between two UE is constant or change little (namely the relative position of two UE is still in the communication range of D2D), the D2D communication condition still satisfies, and source base station judges that two UE need to switch to same Target cell, and source base station just can be made adjudicating and allow two UE switch to Target cell synchronously and keep D2D to communicate by letter like this.
What deserves to be explained is, if do not carry positional information in the measurement report of UE, the UE positional information that the base station also can use base station side to measure.
304, source base station sends the handover request signaling to target BS, the D2D contextual information that comprises UE1 and UE2 in the described handover request signaling, described D2D contextual information can comprise D2D communication cycle, D2D measurement result and synchronous handover request etc., wherein, described synchronous handover request is used for notification target base station UE1 and UE2 need switch to target BS synchronously, and continues D2D communication after switching to target BS.
Need to prove, the handover request signaling of above-mentioned UE1 and UE2, source base station can be merged into a signaling and send to target BS, also can send to target BS respectively.
305, target BS carries out access control to UE1 and UE2.Finish the switchable resource that switch the minizone needs if access success, target BS are UE1 and UE2 configuration, and return the response message of handover request signaling to source base station, described response message comprises that target BS is the switchable resource of UE1 and UE2 configuration.
Concrete, described switchable resource comprises that target BS is the special-purpose random access lead code (Random Access Preamble) of UE1 and UE2 configuration, and be the D2D C-RNTI (D2DCell-Radio Network Temporary Identity, D2D Cell Radio Network Temporary Identifier/Identity, Cell-RNTI) that UE1 and UE2 reserve.
Worth explanation, whether target BS can judge that D2D between UE1 and the UE2 communicates by letter according to the D2D contextual information that source base station sends and can proceed in this residential quarter, generates corresponding indication information and be carried in the response message of handover request signaling to send to source base station.
What deserves to be explained is, if comprise the contextual information of UE1 and two UE of UE2 in the handover request signaling that target BS receives, then target BS can be carried at the switchable resource of UE1 and two UE of UE2 in the response message of a handover request signaling and send to source base station, also the switchable resource of UE1 and UE2 can be carried at respectively in the response message of two handover request signalings and send to source base station.
306, after source base station receives the response message of described handover request signaling, send switching command to UE1 and UE2, switch to target BS with indication UE1 and UE2 from source base station.
Wherein, can comprise in the described switching command that synchronous switching command and target BS are the D2D C-RNTI that UE1 and UE2 reserve, described synchronous switching command is used to indicate UE1 and UE2 switches to target BS synchronously, and proceeds D2D communication after switching to target BS.
Optionally, described switching command can also comprise the D2D messaging parameter of D2D communication needs.Concrete, described D2D messaging parameter comprises: D2D communication cycle and D2D C-RNTI, but be not limited only to this.
What deserves to be explained is, when not comprising described D2D messaging parameter in the switching command, also can by target BS UE switch finish after, be respectively UE1 and UE2 configuration D2D messaging parameter, and described D2D messaging parameter can be carried at and send to UE1 and UE2 in the schedule information.
307, after UE1 and UE2 receive described switching command, carry out synchronously with target BS respectively, send special-purpose random access lead code (Random Access Preamble) to target BS, to obtain the accidental access response information that target BS returns.
308, target BS returns accidental access response information to UE1 and UE2, and carrying target BS in the described accidental access response message is TA (Timing Advance, the Timing Advance) value of UE1 and UE2 configuration.
Optionally, target BS also can send to the TA value of any one UE (for example UE2) another UE (for example UE1), and the TA value that will be got UE2 by UE1 is transmitted to UE2; Also can when sending schedule information, the TA value of UE2 be sent to UE2 by target BS.
Concrete, target BS can by and source base station consult so that carry first instruction in the switching command that source base station sends to any one UE (for example UE2), described first instruction is used to indicate UE2 and need not to carry out random access procedure; UE2 determines not need to carry out random access procedure after receiving switching command, only need to monitor down dispatch information.After UE1 and UE2 received switching command, UE1 sent random access lead code to target BS, and UE2 need not to send; Target BS only sends the response message of random access lead code to UE1.UE2 can directly use the TA value of UE1, and perhaps target BS can calculate the TA value of UE2 by the positional information of UE, the path loss information of D2D etc., and the TA value of UE2 is carried in the accidental access response message that sends to UE1, is transmitted to UE2 by UE1; Also can after insert target BS, UE2 will be carried on for the TA value of UE2 configuration and be handed down to UE2 in the schedule information.
309, after UE1 and UE2 successfully insert target BS, send switching to target BS and finish (Handover Complete) message.
Optionally, when source base station indicates an independent UE (for example UE1) when inserting at random, UE2 is after receiving the TA value that UE1 transmits, and UE2 sends handoff completion message to target BS.If UE2 does not receive the TA value that UE1 transmits, then have only UE1 can send handoff completion message.
310, target BS is that the D2D of UE1 and UE2 communicates by letter and carries out necessary scheduling of resource, is the schedule information that UE1 communicate by letter with UE2 configuration D2D, and described schedule information comprises the information such as running time-frequency resource of D2D communication use.
Optionally, if target BS does not indicate UE1 to transmit the TA information of UE2, then target BS can comprise the TA information of UE2 in schedule information.
311, the D2D that sends of UE1 and the UE2 receiving target base station schedule information of communicating by letter.
312, UE1 proceeds D2D according to described schedule information at Target cell with UE2 and communicates by letter.
Optionally, be the TA value of UE2 configuration if comprise target BS in the schedule information that UE2 receives, then UE2 can replenish the transmission handoff completion message to target BS before D2D communication.
What deserves to be explained is, described minizone switch comprise that the minizone is switched the base station in and the base station between the minizone switching.When UE carried out the minizone switching in the base station, source base station and target BS were same base station.At this moment, Target cell namely is the residential quarter of source base station self, and the UE of D2D communication is equivalent to realize switching between the different districts of source base station.
The method that switch the minizone that the embodiment of the invention provides is detected current D2D communication by UE, determines examining report according to testing result, and described examining report is sent to source base station; When described examining report satisfied default switching condition, source base station sent switching command to UE and switches to Target cell with indication UE.Compared with prior art, after the method that the embodiment of the invention provides can make that the UE that carries out D2D communication switches to Target cell, the D2D that continues to keep current at Target cell communicated by letter, and promotes the user and experiences.
Embodiment 4
The method that the embodiment of the invention provides a kind of minizone to switch, as shown in Figure 4, described method comprises:
Step 401-405 is identical with step 301-305 among the embodiment 3, repeats no more herein.
406, after source base station receives the response message of described handover request signaling, send switching command to any one UE (can be UE1, also can be UE2, and present embodiment is example with UE1), UE1 switches to target BS from source base station with indication.
What deserves to be explained is, can comprise in the described switching command and transmit sign and synchronous switching command, described forwarding sign is used to indicate described any one UE the switching command that receives is transmitted to the residue UE of the current D2D of being in communications status, proceeds D2D communication after two or more UE that described synchronous switching command is used to indicate the current D2D of being in communications status switch to target BS simultaneously.
What deserves to be explained is that if the parameter of UE1 and UE2 different (for example C-RNTI, random access parameter etc.), then source base station can carry difference parameter in the switching command that sends to UE1, be transmitted to UE2 by UE1.
407, UE1 receives describedly behind switching command, transmits switching command according to transmitting sign to UE2, comprises in the described switching command that target BS is information such as the C-RNTI, random access parameter of UE2 configuration.
408, UE1 and UE2 carry out synchronously according to described switching command and target BS respectively, send random access lead code to target BS, and the response message that the receiving target base station is returned is to obtain the TA value.
If indication has only a UE to carry out random access procedure in the switching command, then the TA value of other UE can be transmitted by the UE that carries out random access procedure, also can carry transmission in schedule information by target BS, and detailed process can be referring to embodiment 3.
What deserves to be explained is that if target BS distributes special-purpose random access lead code for UE1 and UE2, UE1 and UE2 also can adopt the access way of competition to insert target BS.
409, after target BS received described random access lead code, the response message to UE1 and UE2 return random access lead code comprised in the described response message that target BS is the TA value of UE1 and UE2 configuration.
410, after UE1 and UE2 successfully inserted target BS, UE1 sent to switch to target BS and finishes (Handover Complete) message.
411, target BS is the schedule information that UE1 communicates by letter with UE2 configuration D2D, and described schedule information comprises the D2D messaging parameter, and described D2D messaging parameter comprises the information such as running time-frequency resource that D2D communication is used.
412, the D2D that sends of UE1 and the UE2 receiving target base station schedule information of communicating by letter.
413, UE1 proceeds D2D according to described schedule information at Target cell with UE2 and communicates by letter.
What deserves to be explained is, described minizone switch comprise that the minizone is switched the base station in and the base station between the minizone switching.When UE carried out the minizone switching in the base station, source base station and target BS were same base station.
The method that switch the minizone that the embodiment of the invention provides, source base station can send to hand off signaling separately a UE, hand off signaling is transmitted to the residue UE that is in the D2D communications status by this UE and switches to finish the minizone.Compared with prior art, after the method that the embodiment of the invention provides not only can make that the UE that carries out D2D communication switches to Target cell, the D2D that continues to keep current at Target cell communicated by letter, and can also save the signaling consumption of base station.
Embodiment 5
The embodiment of the invention provides a kind of UE, can realize the method for UE side among the said method embodiment, and as shown in Figure 5, described UE comprises and report unit 51 and switch unit 52, wherein:
Further, as shown in Figure 6, described UE also comprises measuring unit 53 and receiving element 54, wherein:
Measuring unit 53 is used for the neighbor cell of current UE and D2D communication are measured, and determines measurement report according to measurement result, and described measurement report comprises the metrical information of current UE neighbor cell and the path loss information between current UE and the UE2;
Receiving element 54 is used for receiving switching command, and described switching command comprises synchronous switching command, and described synchronous switching command is used to indicate current UE and UE2 switches to Target cell synchronously, and proceeds D2D communication at described Target cell.
Optionally, the switching command that receiving element 54 receives comprises that also source base station is the D2D messaging parameter of current UE configuration, described D2D messaging parameter is used for proceeding D2D communication at Target cell by current UE, and described D2D messaging parameter comprises D2D communication cycle and D2D C-RNTI.
Concrete, receiving element 54 is concrete for receiving described switching command from source base station, perhaps
Described receiving element 54 can also be used for receiving the switching command that UE2 transmits.
Optionally, when receiving element 54 receives described switching command from source base station, comprise also in the switching command that receiving element 54 receives then and transmit sign that described forwarding sign is used to indicate current UE described switching command is transmitted to UE2;
Further, as shown in Figure 7, described UE also comprises first transmitting element 55, is used for sending switching command to UE2, and UE2 switches to Target cell with indication.
Optionally, can also comprise first instruction in the switching command that receiving element 54 receives, described first instruction is used to indicate current UE and need not to carry out random access procedure;
As shown in Figure 8, described UE also comprises first acquiring unit 56, is used for obtaining the TA value from UE2, sends upstream data according to described TA value to the target BS under the described Target cell, has finished switching to notify described target BS current UE; Perhaps
Described first acquiring unit 56 also is used for obtaining the TA value from the schedule information of target BS, sends upstream data according to described TA value to target BS, has finished switching to notify described target BS current UE.
The UE that the embodiment of the invention provides, by reporting unit 51 to the source base station reporting measurement reports, can described measurement report be used for switching to Target cell for described source base station judgement current UE; When receiving switching command, switch to Target cell by switch unit 52, proceed D2D communication at described Target cell.Compared with prior art, after the base station that the embodiment of the invention provides can make that the UE that carries out D2D communication switches to Target cell, the D2D that continues to keep current at Target cell communicated by letter.
Embodiment 6
The embodiment of the invention provides a kind of base station, can realize the method for base station side among the said method embodiment, and as shown in Figure 9, described base station comprises first processing unit 91 and second transmitting element 92, wherein:
First processing unit 91 is used for judging according to the measurement report that UE1 and UE2 report whether UE1 and UE2 that the current D2D of carrying out communicates by letter can switch to Target cell synchronously;
Second transmitting element 92 is used for when described UE1 and UE2 can switch to Target cell synchronously, at least one UE in described UE1 and UE2 sends switching command, indicating described UE1 and UE2 to switch to Target cell synchronously, and proceed D2D communication at described Target cell.
Further, as shown in figure 10, described base station also comprises second acquisition unit 93, and for obtaining the measurement report that UE1 and UE2 report, described measurement report comprises the metrical information of UE1 neighbor cell, the metrical information of UE2 neighbor cell and the path loss information between UE1 and the UE2.
Concrete, if second transmitting element 92 only sends switching command to UE1, comprise also in the described switching command then and transmit sign that described forwarding sign is used to indicate the UE1 that receives described switching command and transmits switching command to the current UE2 that is carrying out D2D communication;
If second transmitting element 92 only sends switching command to UE2, comprise also in the described switching command then and transmit sign that described forwarding sign is used to indicate the UE2 that receives described switching command and transmits switching command to the current UE2 that is carrying out D2D communication.
Concrete, carrying the D2D messaging parameter in the switching command that second transmitting element 92 sends, described D2D messaging parameter is used for proceeding D2D communication at Target cell by UE1 and/or UE2, and described D2D messaging parameter comprises D2D communication cycle and D2D C-RNTI;
Then as shown in figure 11, described base station also comprises:
The 3rd transmitting element 94, send the handover request signaling for the target BS under described Target cell, carry described D2D messaging parameter in the described handover request signaling, be used to indicate target BS and according to described D2D messaging parameter UE1 and/or UE2 carried out the D2D communication scheduling.
The base station that the embodiment of the invention provides, when the UE that carries out D2D communication need carry out the minizone when switching, the measurement report that is reported according to UE by first processing unit 91 is adjudicated described UE and whether can be switched to Target cell; When described UE can switch to Target cell, second transmitting element 92 sent switching command to described UE, switches to Target cell synchronously to indicate described UE, proceeded D2D communication at described Target cell.Compared with prior art, after the base station that the embodiment of the invention provides can make that the two or more UE that carry out D2D communication switch to Target cell, the D2D that continues to keep current at Target cell communicated by letter; This base station can also only send switching command to finish the minizone switching to an independent UE who is in the D2D communication, can save the signaling consumption of base station.
The system that the embodiment of the invention also provides a kind of minizone to switch comprises the described UE of Fig. 5-8 and the described base station of Fig. 9-11, can make the UE that carries out D2D communication keep D2D communication when switching to neighbor cell.
Through the above description of the embodiments, the those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential common hardware, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium that can read, floppy disk as computer, hard disk or CD etc., comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, 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 described claim.
Claims (22)
1. the method that switch the minizone is characterized in that, comprising:
First subscriber equipment is to the source base station reporting measurement reports, and described measurement report is used for whether can switching to Target cell synchronously for current described first subscriber equipment and second subscriber equipment that carries out equipment room direct communication D2D communication of described source base station judgement;
When receiving switching command, the cell-of-origin that described first subscriber equipment is subordinated to source base station switches to Target cell, continues to carry out D2D with second subscriber equipment at described Target cell and communicates by letter.
2. method according to claim 1 is characterized in that, described first subscriber equipment also comprises before the source base station reporting measurement reports:
Neighbor cell and D2D communication to first subscriber equipment are measured, determine measurement report according to measurement result, described measurement report comprises metrical information and first subscriber equipment of the current D2D of carrying out communication and the path loss information between second subscriber equipment of the first subscriber equipment neighbor cell.
3. method according to claim 1 and 2, it is characterized in that, described switching command comprises synchronous switching command, and first subscriber equipment that described synchronous switching command is used to indicate the current D2D of carrying out communication switches to Target cell synchronously with second subscriber equipment and proceeds D2D at described Target cell and communicate by letter.
4. according to each described method among the claim 1-3, it is characterized in that, described switching command comprises that also described source base station is the D2D messaging parameter of first user device configuration, described D2D messaging parameter is used for proceeding D2D communication at Target cell by first subscriber equipment, and described D2D messaging parameter comprises D2D communication cycle and D2D Cell Radio Network Temporary Identifier/Identity, Cell-RNTI D2D C-RNTI.
5. according to each described method among the claim 1-4, it is characterized in that described switching command is sent by source base station or from the forwarding of second subscriber equipment.
6. method according to claim 5, it is characterized in that, if described switching command is sent by source base station, comprise also in the described switching command then and transmit sign that described forwarding sign is used to indicate first subscriber equipment described switching command is transmitted to second subscriber equipment;
Described method also comprises:
Send described switching command to described second subscriber equipment, switch to Target cell to indicate described second subscriber equipment.
7. according to claim 5 or 6 described methods, it is characterized in that, also comprise first instruction in the described switching command, described first instruction is used to indicate first subscriber equipment and need not to carry out random access procedure;
Described method also comprises:
Obtain the timing advance TA value from second subscriber equipment, send upstream data according to described TA value to the target BS under the described Target cell, finished switching to notify described target BS first subscriber equipment; Perhaps,
Obtain the TA value the schedule information of the target BS under described Target cell, send upstream data according to described TA value to target BS, finished switching to notify described target BS first subscriber equipment.
8. the method that switch the minizone is characterized in that, comprising:
Judge according to first subscriber equipment and the measurement report of second user equipment to report and currently to carry out first subscriber equipment and second subscriber equipment that equipment room direct communication D2D communicates by letter and whether can switch to Target cell synchronously;
When described first subscriber equipment and second subscriber equipment can switch to Target cell synchronously, in described first subscriber equipment and second subscriber equipment at least one sends switching command, indicating described first subscriber equipment and second subscriber equipment to switch to Target cell synchronously, and proceed D2D communication at described Target cell.
9. method according to claim 8, it is characterized in that described measurement report comprises the metrical information of the described first subscriber equipment neighbor cell, metrical information and first subscriber equipment of the current D2D of carrying out communication and the path loss information between second subscriber equipment of the second subscriber equipment neighbor cell.
10. according to Claim 8 or 9 described methods, it is characterized in that described at least one in described first subscriber equipment and second subscriber equipment sends switching command and comprise:
Send switching command to first subscriber equipment;
Comprise also in the described switching command and transmit sign that described forwarding sign is used to indicate first subscriber equipment that receives described switching command and transmits switching command to described second subscriber equipment;
Perhaps
Described at least one in described first subscriber equipment and second subscriber equipment sends switching command and comprises:
Send switching command to second subscriber equipment;
Comprise also in the described switching command and transmit sign that described forwarding sign is used to indicate second subscriber equipment that receives described switching command to the first device forwards switching command of the current D2D of carrying out communication.
11. each described method according to Claim 8-10, it is characterized in that, carry the D2D messaging parameter in the described switching command, described D2D messaging parameter is used for proceeding D2D communication at Target cell by first subscriber equipment and/or second subscriber equipment, and described D2D messaging parameter comprises D2D communication cycle and D2D Cell Radio Network Temporary Identifier/Identity, Cell-RNTI D2D C-RNTI;
Described method also comprises:
Target BS under described Target cell sends the handover request signaling, carry described D2D messaging parameter in the described handover request signaling, be used to indicate target BS and according to described D2D messaging parameter described first subscriber equipment and/or second subscriber equipment carried out the D2D communication scheduling.
12. a subscriber equipment is characterized in that, comprising:
Report the unit, be used for to the source base station reporting measurement reports, described measurement report is used for for described source base station judgement current user equipment and carries out second subscriber equipment that equipment room direct communication D2D communicates by letter with current user equipment whether can switch to Target cell synchronously;
Switch unit is used for when receive switching command, switches to Target cell from the cell-of-origin of described source base station, carries out D2D in described Target cell continuation with described second subscriber equipment and communicates by letter.
13. subscriber equipment according to claim 12 is characterized in that, also comprises:
Measuring unit, be used for neighbor cell and the D2D communication of current user equipment are measured, determine measurement report according to measurement result, described measurement report comprises the metrical information of current user equipment neighbor cell and the path loss information between current user equipment and described second subscriber equipment.
14. according to claim 12 or 13 described subscriber equipmenies, it is characterized in that described subscriber equipment also comprises:
Receiving element, be used for receiving switching command, described switching command comprises synchronous switching command, and described synchronous switching command is used to indicate current user equipment and described second subscriber equipment switches to Target cell synchronously, and proceeds D2D communication at described Target cell.
15. according to each described subscriber equipment among the claim 12-14, it is characterized in that, the switching command that described receiving element receives comprises that also described source base station is the D2D messaging parameter of current user equipment configuration, described D2D messaging parameter is used for proceeding D2D communication at Target cell by current user equipment, and described D2D messaging parameter comprises D2D communication cycle and D2D Cell Radio Network Temporary Identifier/Identity, Cell-RNTI D2D C-RNTI.
16., it is characterized in that described receiving element specifically is used for receiving described switching command from source base station, perhaps according to each described subscriber equipment among the claim 12-15
Described receiving element also is used for receiving the switching command that described second subscriber equipment is transmitted.
17. subscriber equipment according to claim 16, it is characterized in that, when described receiving element receives described switching command from source base station, comprise also in the switching command that described receiving element receives then and transmit sign that described forwarding sign is used to indicate current user equipment described switching command is transmitted to described second subscriber equipment;
Described subscriber equipment also comprises:
First transmitting element is used for sending described switching command to described second subscriber equipment, switches to Target cell to indicate described second subscriber equipment.
18. according to claim 16 or 17 described subscriber equipmenies, it is characterized in that, also comprise first instruction in the switching command that described receiving element receives, described first instruction is used to indicate current user equipment and need not to carry out random access procedure;
Described subscriber equipment also comprises:
First acquiring unit is used for obtaining the timing advance TA value from described second subscriber equipment, sends upstream data according to described TA value to the target BS under the described Target cell, has finished switching to notify described target BS current user equipment; Perhaps
Described first acquiring unit also is used for obtaining the TA value from the schedule information of target BS, sends upstream data according to described TA value to target BS, has finished switching to notify described target BS current user equipment.
19. a base station is characterized in that, comprising:
First processing unit is used for judging according to first subscriber equipment and the measurement report of second user equipment to report and currently carries out first subscriber equipment and second subscriber equipment that equipment room direct communication D2D communicates by letter and whether can switch to Target cell synchronously;
Second transmitting element, described first subscriber equipment and second subscriber equipment be used for when can switch to Target cell synchronously, in described first subscriber equipment and second subscriber equipment at least one sends switching command, indicating described first subscriber equipment and described second subscriber equipment to switch to Target cell synchronously, and proceed D2D communication at described Target cell.
20. base station according to claim 19 is characterized in that, described base station also comprises:
Second acquisition unit, be used for obtaining the measurement report of first subscriber equipment and second user equipment to report, described measurement report comprises the metrical information of the described first subscriber equipment neighbor cell, metrical information and first subscriber equipment of the current D2D of carrying out communication and the path loss information between second subscriber equipment of the second subscriber equipment neighbor cell.
21. according to claim 19 or 20 described base stations, it is characterized in that, if described second transmitting element only sends switching command to described first subscriber equipment, comprise also in the described switching command then and transmit sign that described forwarding sign is used to indicate first subscriber equipment that receives described switching command and transmits switching command to described second subscriber equipment;
If described second transmitting element only sends switching command to described second subscriber equipment, comprise also in the described switching command then and transmit sign that described forwarding sign is used to indicate second subscriber equipment that receives described switching command and transmits switching command to first subscriber equipment of the current D2D of carrying out communication.
22. according to each described base station among the claim 19-21, it is characterized in that, carry the D2D messaging parameter in the switching command that described second transmitting element sends, described D2D messaging parameter is used for proceeding D2D communication at Target cell by first subscriber equipment and/or second subscriber equipment, and described D2D messaging parameter comprises D2D communication cycle and D2D Cell Radio Network Temporary Identifier/Identity, Cell-RNTI D2D C-RNTI;
Described base station also comprises:
The 3rd sends subelement, send the handover request signaling for the target BS under described Target cell, carry described D2D messaging parameter in the described handover request signaling, be used to indicate target BS and according to described D2D messaging parameter first subscriber equipment and/or second subscriber equipment carried out the D2D communication scheduling.
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| PCT/CN2012/086042 WO2013102390A1 (en) | 2012-01-05 | 2012-12-06 | Intercell handover method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210002055.7A CN103200634B (en) | 2012-01-05 | 2012-01-05 | The method and device of handover between cells |
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| CN103200634A true CN103200634A (en) | 2013-07-10 |
| CN103200634B CN103200634B (en) | 2016-10-05 |
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| CN201210002055.7A Active CN103200634B (en) | 2012-01-05 | 2012-01-05 | The method and device of handover between cells |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2013102390A1 (en) | 2013-07-11 |
| CN103200634B (en) | 2016-10-05 |
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