CN103096456B - The method for building up of synchronization link and controller - Google Patents
The method for building up of synchronization link and controller Download PDFInfo
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- 238000004891 communication Methods 0.000 description 12
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
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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
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/0015—Synchronization between nodes one node acting as a reference for the others
Abstract
The embodiment of the invention discloses a kind of method for building up and controller of synchronization link, described method comprises: receive the same-frequency measure reporting that UE reports, described same-frequency measure reporting comprises SFN-CFN observed time difference; The timing difference of one or more cell set is calculated according to described SFN-CFN observed time difference; Described timing difference is preserved; When a UE carries out alien frequencies direct-cut operation or wireless heterogeneous networks (RRC) connection establishment and a described UE sets up multilink on target frequency, from the record preserved, search the timing difference of the first community belonging to Article 1 link that a described UE sets up and the cell set of the second community belonging to the Article 2 link that will set up and calculate the timing parameters of described second community, when the link needing to set up is more than two, calculate the timing parameters of the multilink that will set up according to the method calculating Article 2 link timing parameters.The present invention is applicable to the scene that cell merge, RRC connection establishment etc. need to obtain intercell synchronous timing information.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of method for building up of synchronization link and controller.
Background technology
Radio communication is that the realization of mobile communication provides the foundation, and the effective coverage range of wireless network determines the coverage of mobile communication.The impossible infinite height of antenna (base station) due to wireless signal emission, transmitting power also can not be infinitely great, and the power of mobile phone is more limited, therefore the service range (community) of an independent antenna (base station) is very limited.Realize the wireless coverage in the whole nation, system must be made up of various communities.
UE (User Equipment, subscriber equipment) when conversing, if move to another one community (community B) from a community (community A), may occur the situation such as signal attenuation, channel interference increase, these all can affect the speech quality of user.At this moment system can allow UE select a better signal, as the signal that community B provides.So wireless channel supplier Ye Yaoyou community A changes into community B.When crossing over cell boarder, wireless channel between UE and base station transforms to the wireless channel of UE and another one base station (community B) from current base station (community A), or transform to the another one wireless channel of same base station, this process is called switching.Simultaneously grand diversity shows a UE to set up two or more same frequency link, and wherein each link belongs to different co-frequency cells, can obtain the merging gain of grand diversity like this, improves user's communication quality.UE, when soft changing state, receives data from multilink simultaneously, obtains the merging gain of grand diversity, can reduce the impact of decline and reduce UE transmitting power.
Realizing in process of the present invention, inventor finds that in prior art, at least there are the following problems:
When UE carries out alien frequencies direct-cut operation or RRC (Radio Resource Control, wireless heterogeneous networks) connection establishment stage, if first time sets up link on target frequency, then a link can only be set up; If first time is wanted to set up two links simultaneously, owing to not having Timing measurement parameter, network cannot ensure the Timing Synchronization of two links set up, and can not obtain the merging gain of grand diversity.
Summary of the invention
Many aspects of the present invention provide a kind of method for building up and controller of synchronization link, can make UE on target frequency, set up link for the first time and just obtain grand diversity merging gain, effectively reduce the call drop probability of user in alien frequencies direct-cut operation.
An aspect of of the present present invention, provides a kind of method for building up of synchronization link, comprising: the same-frequency measure reporting receiving one or more reported by user equipment UE, and described same-frequency measure reporting comprises System Frame Number-Connection Frame Number SFN-CFN observed time difference; The timing difference of one or more cell set is calculated according to described SFN-CFN observed time difference; Described timing difference is preserved; When a UE carries out alien frequencies direct-cut operation or RRC connection establishment and a described UE sets up multilink on target frequency, from the record preserved, search the timing difference of the first community belonging to Article 1 link that a described UE sets up and the cell set of the second community belonging to the Article 2 link that will set up and calculate the timing parameters of described second community, when the link needing to set up is more than two, calculate the timing parameters of the multilink that will set up according to the method calculating Article 2 link timing parameters.
Another aspect of the present invention, provides a kind of controller, comprising: receiving element, and for receiving the same-frequency measure reporting that one or more UE reports, described same-frequency measure reporting comprises SFN-CFN observed time difference; Timing difference computing unit, for calculating the timing difference of one or more cell set according to described SFN-CFN observed time difference; Timing difference storage unit, for preserving described timing difference; Timing parameters computing unit, for carry out alien frequencies direct-cut operation or RRC connection establishment as a UE and a described UE sets up multilink on target frequency time, from the record preserved, search the timing difference of the first community belonging to Article 1 link that a described UE sets up and the cell set of the second community belonging to the Article 2 link that will set up and calculate the timing parameters of described second community, when the link needing to set up is more than two, calculate the timing parameters of all the other links that will set up according to the method calculating Article 2 link timing parameters.
Compared with prior art, the method for building up of the synchronization link of foregoing description and controller, can make UE on target frequency, set up link for the first time and just obtain grand diversity merging gain, effectively reduce the call drop probability of user in alien frequencies direct-cut operation network.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of the method for building up of a kind of synchronization link of one embodiment of the invention;
Fig. 2 is the schematic flow sheet of the method for building up of a kind of synchronization link of another embodiment of the present invention;
Fig. 3 is the schematic flow sheet of the method for building up of a kind of synchronization link of another embodiment of the present invention;
Fig. 4 is the structural representation of a kind of controller of another embodiment of the present invention;
Fig. 5 is the structural representation of a kind of controller of another embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
For making the advantage of technical solution of the present invention clearly, below in conjunction with drawings and Examples, the present invention is elaborated.
Various technology described herein can be used for various wireless communication system, such as current 2G, 3G communication system and next generation communication system, such as global system for mobile communications (GSM, Global System for Mobile communications), code division multiple access (CDMA, Code Division Multiple Access) system, time division multiple access (TDMA, Time Division Multiple Access) system, Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wideband Code Division Multiple Access Wireless), frequency division multiple access (FDMA, Frequency Division Multiple Addressing) system, OFDM (OFDMA, Orthogonal Frequency-Division Multiple Access) system, Single Carrier Frequency Division Multiple Access (SC-FDMA) system, GPRS (GPRS, General Packet Radio Service) system, Long Term Evolution (LTE, Long Term Evolution) system, and other these type of communication systems.
In conjunction with subscriber equipment and/or base station and/or base station controller, various aspect is described herein.
Subscriber equipment, can be point to the equipment that user provides voice and/or data connectivity, have the portable equipment of wireless connecting function or be connected to other treatment facilities of radio modem.Wireless terminal can through wireless access network (such as, RAN, Radio Access Network) communicate with one or more core net, wireless terminal can be mobile terminal, as mobile phone (or being called " honeycomb " phone) and the computer with mobile terminal, such as, can be portable, pocket, hand-hold type, built-in computer or vehicle-mounted mobile device, they and wireless access network exchange language and/or data.Such as, Personal Communications Services (PCS, Personal Communication Service) phone, cordless telephone, Session initiation Protocol (SIP) phone, wireless local loop (WLL, Wireless Local Loop) stand, the equipment such as personal digital assistant (PDA, Personal Digital Assistant).Wireless terminal also can be called system, subscri er unit (Subscriber Unit), subscriber station (Subscriber Station), mobile radio station (Mobile Station), travelling carriage (Mobile), distant station (Remote Station), access point (Access Point), remote terminal (Remote Terminal), access terminal (Access Terminal), user terminal (User Terminal), user agent (User Agent), subscriber equipment (User Device), or subscriber's installation (User Equipment).
Base station (such as, access point) can to refer in Access Network the equipment by one or more sector and wireless terminal communications on aloft interface.Base station can be used for the air frame received and IP to divide into groups mutually to change, and as the router between wireless terminal and the remainder of Access Network, wherein the remainder of Access Network can comprise Internet protocol (IP) network.Base station also tunable to the attribute management of air interface.Such as, base station can be the base station (BTS in GSM or CDMA, Base Transceiver Station), also can be the base station (NodeB) in WCDMA, can also be evolved base station (NodeB or eNB or e-NodeB in LTE, evolutional Node B), the present invention does not limit.
Base station controller, can be the base station controller (BSC, base station controller) in GSM or CDMA, also can be the radio network controller (RNC in WCDMA, Radio Network Controller), the present invention does not limit.
In addition, term " system " and " network " are often used interchangeably in this article herein.Term "and/or" herein, being only a kind of incidence relation describing affiliated partner, can there are three kinds of relations in expression, and such as, A and/or B, can represent: individualism A, exists A and B simultaneously, these three kinds of situations of individualism B.In addition, character "/" herein, general expression forward-backward correlation is to the relation liking a kind of "or".
One embodiment of the present of invention provide a kind of method for building up of synchronization link, as shown in Figure 1.
101, controller receives the same-frequency measure reporting that one or more UE reports, described same-frequency measure reporting comprises SFN (System Frame Number-Connection, System Frame Number)-CFN (Frame Number, Connection Frame Number) observed time difference.
102, controller calculates the timing difference of one or more cell set according to described SFN-CFN observed time difference.
103, described timing difference is preserved by controller.
104, when a UE carries out alien frequencies direct-cut operation or RRC connection establishment and a described UE sets up multilink on target frequency, controller is searched the timing difference of the first community belonging to Article 1 link that a described UE sets up and the cell set of the second community belonging to the Article 2 link that will set up and is calculated the timing parameters of described second community from the record preserved, when the link needing to set up is more than two, calculate the timing parameters of the multilink that will set up according to the method calculating Article 2 link timing parameters.
Wherein, described direct-cut operation refers to the switching of UE between the base station or coverage cell of different frequency; The community that described Target cell will be switched to for a UE.
Wherein, a described UE can be the UE described in step 101, also can be other UE.
Wherein, after the same-frequency measure reporting that described reception UE reports, following content is also comprised.A selected cell set is concentrated from cell candidates, wherein, described cell set is that multiple candidate cell combination of two forms, in the cell set combined, distinguish Liang Ge community with the first community and the second community, wherein, described candidate cell is the measuring object community in same-frequency measure reporting.
The same-frequency measure reporting that controller reports according to UE, determine the SFN-CFN observed time difference of described first community and the SFN-CFN observed time difference of described second community, the SFN-CFN observed time difference of wherein said first community comprises first frame number skew (OFF1) and the first frame header deviation (Tm1) two parts, and the SFN-CFN observed time difference of described second community comprises second frame number skew (OFF2) and the second frame header deviation (Tm2) two parts.
The timing difference that then controller calculates one or more cell set according to described SFN-CFN observed time difference is specially:
Described timing difference=(OFF1 × 38400+Tm1)-(OFF2 × 38400+Tm2).
Further, described controller searches the timing difference of the first community belonging to Article 1 link that a described UE sets up and the cell set of the second community belonging to the Article 2 link that will set up and the timing parameters calculating described second community comprises from the record preserved:
Calculate timing parameters frame number skew 2 (frame offset2) and the frame header deviation 2 (chip offset2) of the second community:
temp＝(frame offset1×38400+chip offset1)-delt，
Wherein, temp is provisional parameter, and the timing parameters frame header deviation 1, delt of frame offset1 to be timing parameters frame number skew 1, the chip offsetl of the first community be the first community is the timing difference of the first community and the second community.
When temp >=0,
Frame offset2=temp/38400 ,/represent divide operations and get the business of result,
Chip offset2=temp%38400, % represent divide operations and get more than result;
As temp < 0, Temp=temp+38400 × 256,
Frame offset2=Temp/38400 ,/represent divide operations and get the business of result,
Chip offset2=Temp%38400, % represent divide operations and get more than result.
Wireless heterogeneous networks (RRC) parameter that this link is corresponding, dedicated physical channel frames number skew (DPCH frame offset)=(chip offset2/256) × 256, this computing is rounding computing, and DPCH frame offset is the integral multiple of 256.
Wherein, the screening rule of described Candidate Set includes but not limited to: in the measuring object community that same-frequency measure reporting reports, select candidate cell community that UE received signal quality is better than described threshold value alternatively concentrated according to the threshold value preset; The alternatively community, community of not triggering 1B/1F event is screened from same-frequency measure reporting; Or screening triggers the alternatively community, community of 1A/1D event in same-frequency measure reporting; Or, the candidate cell that the measuring object community reported by same-frequency measure reporting is all alternatively concentrated.
Wherein, for certain same-frequency measure reporting, for same cell set, only can produce a timing difference record, and produce the timing difference record of multiple cell set;
For certain cell set, there are many different same-frequency measure reportings, all can produce a timing difference record according to every bar same-frequency measure reporting, wherein, described same-frequency measure reporting is reported successively by same UE or different UE.
Wherein, describedly described timing difference is carried out preservation be specially: each cell set calculates one or more timing difference according to same-frequency measure reporting, each timing difference is preserved as a record, wherein, described record at least comprises one of field below: the community ID of the first community and the second community or scrambling code number, timing difference between the first community and the second community, be used to indicate the validity field of described timing difference record.
Wherein, described in be used to indicate described timing difference record validity field and record rise time associated, concrete, preserving the described record rise time can comprise: keeping records rise time stamp or preserve the time span of the invalid moment point of this recording distance.
The method for building up of the synchronization link that the embodiment of the present invention provides, controller receives the same-frequency measure reporting that one or more UE reports, and described same-frequency measure reporting comprises SFN-CFN observed time difference; The timing difference of one or more cell set is calculated according to described SFN-CFN observed time difference; Described timing difference is preserved, when a UE carries out alien frequencies direct-cut operation or RRC connection establishment and a described UE sets up multilink on target frequency, from the record preserved, search the timing difference of the first community belonging to Article 1 link that a described UE sets up and the cell set of the second community belonging to the Article 2 link that will set up and calculate the timing parameters of described second community, when the link needing to set up is more than two, calculate the timing parameters of the multilink that will set up according to said method.Compared with prior art, the embodiment of the present invention can make UE on target frequency, set up link for the first time and just obtain grand diversity merging gain, effectively reduces the call drop probability of user in alien frequencies direct-cut operation.
Another embodiment of the present invention provides a kind of method for building up of synchronization link, 2nd UE is when the grand diversity immediately in carry out alien frequencies direct-cut operation grand diversity or RRC stage immediately, controller decision-making the 2nd UE sets up many articles of new links on target frequency simultaneously, and now the 2nd UE does not report the cell synchronization information of Target cell, as shown in Figure 2.
201, controller obtains the timing parameters of the Article 1 link that will set up.
Controller selects a community as the Article 1 link of the 2nd UE from Target cell, and described community is as the first community, and network obtains the timing parameters of Article 1 link according to the principle of set Balanced interface load and load of eating dishes without rice or wine, and described timing parameters comprises:
Frame offsetl (frame number skew 1), chip offsetl (frame header deviation 1);
And RRC parameter, such as, described RRC parameter comprises:
Default DPCH offset value (acquiescence DPCH deviant) and DPCH frame offset (dedicated physical channel frames number skew).
202, controller obtains the timing parameters of Article 2 link and the timing parameters of all the other multilinks that will set up.
Wherein, described Article 2 link and Article 1 link are synchronization link, and all the other multilinks are all synchronization link with described Article 1 link.
Concrete, before the timing parameters calculating described Article 2 link, first read the timing difference of the second community belonging to described Article 2 link and the first minizone.
Wherein, calculate described timing difference, comprising:
According to the same-frequency measure reporting that a UE reports, determine the SFN-CFN observed time difference of described first community and the SFN-CFN observed time difference of described second community, the SFN-CFN observed time difference of wherein said first community comprises first frame number skew (OFF1) and the first frame header deviation (Tm1) two parts, and the SFN-CFN observed time difference of described second community comprises second frame number skew (OFF2) and the second frame header deviation (Tm2) two parts;
Then timing difference (delt)=(OFF1 × 38400+Tm1)-(OFF2 × 38400+Tm2).
Further, the timing parameters calculating described Article 2 link comprises:
The timing parameters frame number calculating the second community and the first cell synchronous offsets 2 frame offset2 and frame header deviation 2 chip offset2.
Concrete, comprising:
Temp=(frame offset1 × 38400+chip offset1)-delt, wherein, temp is provisional parameter.
When temp >=0,
Frame offset2=temp/38400 ,/represent divide operations and get the business of result,
Chip offset2=temp%38400, % represent divide operations and get more than result;
As temp < 0, Temp=temp+38400 × 256,
Frame offset2=Temp/38400 ,/represent divide operations and get the business of result,
Chip offset2=Temp%38400, % represent divide operations and get more than result.
The RRC parameter that this link is corresponding, dedicated physical channel frames number skew (DPCH frame offset)=(chip offset2/256) × 256, this computing is rounding computing, and DPCH frame offset is the integral multiple of 256.
Further, the computational methods of the timing parameters of the timing parameters reference Article 2 link of all the other multilinks obtain.
203, Article 2 link and all the other links is set up according to the timing parameters of Article 2 link and the timing parameters of all the other links.
The method for building up of the synchronization link that the embodiment of the present invention provides, controller obtains the timing parameters of the Article 1 link that will set up; Controller obtains the timing parameters of Article 2 link and the timing parameters of all the other multilinks that will set up; Article 2 link and all the other links are set up according to the timing parameters of Article 2 link and the timing parameters of all the other links.Compared with prior art, the embodiment of the present invention can make UE on target frequency, set up link for the first time and just obtain grand diversity merging gain, effectively reduces the call drop probability of user in alien frequencies direct-cut operation.
Another embodiment of the present invention provides a kind of method for building up of synchronization link, controller decision-making the 2nd UE is from community 11 direct-cut operation to community 22, wherein, community 11 and community 12 are for being in the co-frequency cell of F1 frequency layer, community 21 and community 22 are for being in the co-frequency cell of F2 frequency layer, community 11 and community 21 again for belonging to the community of same base station, as shown in Figure 3.
301, controller obtains the SFN-CFN observed time difference of the community 11 that a UE reports.
302, the timing difference of controller calculation plot 11 and community 21.
Concrete, described community 11 and community 21 are for belonging to the community of same base station, its BFN (Node B Frame Number counter, frame number counts) identical, Tcell (the Timing offset of a cell of known cell 11, the cell offset time) be Tcell1, the Tcell of community 21 is Tcell2, and two cell timing difference computational methods are:
deltl＝SFN11-SFN21＝Tcell1-Tcell2。
303, the timing difference between controller calculation plot 21 and community 22.
Concrete, the timing difference between described calculation plot 21 and community 22 comprises:
Receive the SFN-CFN observed time difference of the community 21 that a UE reports and the SFN-CFN observed time difference of community 22, the SFN-CFN observed time difference of its small area 21 comprises first frame number skew OFF1 and first frame header deviation Tm1 two parts, and the SFN-CFN observed time difference of community 22 comprises second frame number skew OFF2 and second frame header deviation Tm2 two parts;
Timing difference delt2=(OFF1 × 38400+Tm1)-(OFF2 × 38400+Tm2).
304, controller calculating the 2nd UE and the community 22 timing parameters frame number set up needed for link offset (frame offset2) and frame header deviation (chip offset2).
Concrete, the computational methods of described frame offset2 and chip offset2 comprise:
Temp=(frame offset1 × 38400+chip offset1)-delt2-(Tcell1-Tcell2), wherein, temp is provisional parameter.
When temp >=0,
Frame offset2=temp/38400 ,/represent divide operations and get the business of result,
Chip offset2=temp%38400, % represent divide operations and get more than result;
As temp < 0, Temp=temp+38400 × 256,
Frame offset2=Temp/38400 ,/represent divide operations and get the business of result,
Chip offset2=Temp%38400, % represent divide operations and get more than result.
The RRC parameter that this link is corresponding, dedicated physical channel frames number skew DPCH frame offset=(chip offset2/256) × 256, this computing is rounding computing, and DPCH frame offset is the integral multiple of 256.
305, the link of the 2nd UE and community 22 set up by controller according to timing parameters.
The method for building up of the synchronization link that the embodiment of the present invention provides, controller obtains the SFN-CFN observed time difference of the community 11 that a UE reports; The timing difference of controller calculation plot 11 and community 21; Timing difference between controller calculation plot 21 and community 22; Controller calculates the 2nd UE and the community 22 timing parameters frame number set up needed for link offsets (frame offset2) and frame header deviation (chip offset2); Controller sets up the link of the 2nd UE and community 22 according to timing parameters.Compared with prior art, the embodiment of the present invention can make UE carry out direct-cut operation when keeping self CFN constant, and in this handoff procedure, the transmission of data is more stable, not easily dropped calls occurs.
The present embodiment provides a kind of controller, and as shown in Figure 4, described controller comprises: receiving element 41, timing difference computing unit 42, timing difference storage unit 43 and timing parameters computing unit 44.
Receiving element 41, for receiving the same-frequency measure reporting that one or more UE reports, described same-frequency measure reporting comprises SFN-CFN observed time difference.
Timing difference computing unit 42, for calculating the timing difference of one or more cell set according to described SFN-CFN observed time difference.
Timing difference storage unit 43, for preserving described timing difference.
Timing parameters computing unit 44, for carry out alien frequencies direct-cut operation or RRC connection establishment as a UE and a described UE sets up multilink on target frequency time, from the record preserved, search the timing difference of the first community belonging to Article 1 link that a described UE sets up and the cell set of the second community belonging to the Article 2 link that will set up and calculate the timing parameters of described second community, when the link link needing to set up is more than two, calculate the timing parameters of the multilink that will set up according to the method calculating Article 2 link timing parameters.
Wherein, as shown in Figure 5, described controller also comprises: cell selection unit 45, for concentrating a selected cell set from cell candidates, wherein, described cell set is that in Candidate Set, multiple candidate cell combination of two forms, in the cell set combined, distinguish Liang Ge community with the first community and the second community, wherein, described candidate cell is the measuring object community in same-frequency measure reporting;
Then described receiving element 41 is also for the same-frequency measure reporting reported according to UE, determine the SFN-CFN observed time difference of described first community and the SFN-CFN observed time difference of described second community, the SFN-CFN observed time difference of wherein said first community comprises OFF1 (the first frame number skew) and Tm1 (the first frame header deviation) two parts, and the SFN-CFN observed time difference of described second community comprises OFF2 (the second frame number skew) and Tm2 (the second frame header deviation) two parts;
Then described timing difference computing unit 42, specifically for: the timing difference calculating one or more cell set, described timing difference=(OFF1 × 38400+Tm1)-(OFF2 × 38400+Tm2).
Concrete, described cell selection unit 45 also for:
According to the threshold value preset in the measuring object community that same-frequency measure reporting reports, select the candidate cell that community that UE received signal quality is better than described threshold value is alternatively concentrated; Or
The alternatively community, community of not triggering 1B/1F event is screened from same-frequency measure reporting; Or
In same-frequency measure reporting, screening triggers the alternatively community, community of 1A/1D event; Or
The candidate cell that the measuring object community reported by same-frequency measure reporting is all alternatively concentrated.
Wherein, described timing difference storage unit 43, specifically for the timing difference of each cell set is preserved as a record, wherein, described record at least comprises one of field below: the community ID of the first community and the second community or scrambling code number, timing difference between the first community and the second community, be used to indicate the validity field of described timing difference record.
Further, described timing difference storage unit 43 comprises:
Record rise time storage unit 431, for keeping records rise time stamp or the time span of preserving the invalid moment point of this recording distance.
The controller that the embodiment of the present invention provides, receiving element 41 receives the same-frequency measure reporting that one or more UE reports, and described same-frequency measure reporting comprises SFN-CFN observed time difference; Timing difference computing unit 42 calculates the timing difference of one or more cell set according to described SFN-CFN observed time difference; Described timing difference is preserved by timing difference storage unit 43; When a UE carries out alien frequencies direct-cut operation or RRC connection establishment and a described UE sets up multilink on target frequency, timing parameters computing unit 44 is searched the timing difference of the first community belonging to Article 1 link that a described UE sets up and the cell set of the second community belonging to the Article 2 link that will set up and is calculated the timing parameters of described second community from the record preserved, when the link needing to set up is more than two, calculate the timing parameters of the multilink that will set up according to said method.Compared with prior art, the embodiment of the present invention can make UE on target frequency, set up link for the first time and just obtain grand diversity merging gain, effectively reduces the call drop probability of user in alien frequencies direct-cut operation.
The controller that the embodiment of the present invention provides can realize the above-mentioned embodiment of the method provided, and concrete function realizes the explanation referred in embodiment of the method, does not repeat them here.The method for building up of the synchronization link that the embodiment of the present invention provides and controller go for the scene that cell merge, RRC connection establishment etc. need to obtain intercell synchronous timing information, but are not limited only to this.
Those skilled in the art can be well understood to, and for convenience and simplicity of description, the system of foregoing description, the specific works process of device and unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
In several embodiments that the application provides, should be understood that, disclosed system, apparatus and method, can realize by another way.Such as, device embodiment described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical, machinery or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. various can be program code stored medium.
The above, above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (11)
1. a method for building up for synchronization link, is characterized in that, comprising:
Receive the same-frequency measure reporting of one or more reported by user equipment UE, described same-frequency measure reporting comprises System Frame Number-Connection Frame Number SFN-CFN observed time difference;
The timing difference of one or more cell set is calculated according to described SFN-CFN observed time difference;
Described timing difference is preserved;
When a UE carries out alien frequencies direct-cut operation or radio resource control RRC connection establishment and a described UE sets up multilink on target frequency, from the record preserved, search the timing difference of the first community belonging to Article 1 link that a described UE sets up and the cell set of the second community belonging to the Article 2 link that will set up and calculate the timing parameters of described second community, when the link needing to set up is more than two, calculate the timing parameters of the multilink that will set up according to the method calculating Article 2 link timing parameters.
2. the method for building up of synchronization link according to claim 1, is characterized in that, after the same-frequency measure reporting that the one or more UE of described reception reports, also comprises:
A selected cell set is concentrated from cell candidates, wherein, described cell set is that in Candidate Set, multiple candidate cell combination of two forms, Liang Ge community is distinguished with the first community and the second community in the cell set combined, wherein, described candidate cell is the measuring object community in same-frequency measure reporting;
According to the same-frequency measure reporting that UE reports, determine the SFN-CFN observed time difference of described first community and the SFN-CFN observed time difference of described second community, the SFN-CFN observed time difference of wherein said first community comprises first frame number skew OFF1 and first frame header deviation Tm1 two parts, and the SFN-CFN observed time difference of described second community comprises second frame number skew OFF2 and second frame header deviation Tm2 two parts;
The timing difference then calculating one or more cell set according to described SFN-CFN observed time difference is specially:
Timing difference=(OFF1 × 38400+Tm1)-(OFF2 × 38400+Tm2).
3. method according to claim 2, is characterized in that, the screening rule of described Candidate Set comprises:
According to the threshold value preset in the measuring object community that same-frequency measure reporting reports, select the candidate cell that community that UE received signal quality is better than described threshold value is alternatively concentrated; Or
The alternatively community, community of not triggering 1B/1F event is screened from same-frequency measure reporting; Or
In same-frequency measure reporting, screening triggers the alternatively community, community of 1A/1D event; Or
The candidate cell that the measuring object community reported by same-frequency measure reporting is all alternatively concentrated.
4. the method for building up of synchronization link according to claim 1, is characterized in that, for certain same-frequency measure reporting, only can produce a timing difference record for same cell set, and produce the timing difference record of multiple cell set;
For certain cell set, there are many different same-frequency measure reportings, every bar same-frequency measure reporting all can produce a timing difference record, and wherein, described same-frequency measure reporting is reported by identical UE or different UE.
5. the method for building up of synchronization link according to claim 1, is characterized in that, describedly described timing difference is carried out preservation is specially:
Each cell set calculates one or more timing difference according to same-frequency measure reporting, each timing difference is preserved as a record, wherein, described record at least comprises one of field below: the community ID of the first community and the second community or scrambling code number, timing difference between the first community and the second community, be used to indicate the validity field of described timing difference record.
6. the method for building up of synchronization link according to claim 5, is characterized in that, described in be used to indicate described timing difference record validity field and record rise time associated,
Then the described preservation described record rise time comprises:
The keeping records rise time stabs or preserves the time span of the invalid moment point of this recording distance.
7. a controller, is characterized in that, comprising:
Receiving element, for receiving the same-frequency measure reporting that one or more UE reports, described same-frequency measure reporting comprises SFN-CFN observed time difference;
Timing difference computing unit, for calculating the timing difference of one or more cell set according to described SFN-CFN observed time difference;
Timing difference storage unit, for preserving described timing difference;
Timing parameters computing unit, for carry out alien frequencies direct-cut operation or RRC connection establishment as a UE and a described UE sets up multilink on target frequency time, from the record preserved, search the timing difference of the first community belonging to Article 1 link that a described UE sets up and the cell set of the second community belonging to the Article 2 link that will set up and calculate the timing parameters of described second community, when the link needing to set up is more than two, calculate the timing parameters of the multilink that will set up according to the method calculating Article 2 link timing parameters.
8. controller according to claim 7, is characterized in that, described controller also comprises:
Cell selection unit, for concentrating a selected cell set from cell candidates, wherein, described cell set is that in Candidate Set, multiple candidate cell combination of two forms, Liang Ge community is distinguished with the first community and the second community in the cell set combined, wherein, described candidate cell is the measuring object community in same-frequency measure reporting;
Then described receiving element is also for the same-frequency measure reporting that reports according to UE, determine the SFN-CFN observed time difference of described first community and the SFN-CFN observed time difference of described second community, the SFN-CFN observed time difference of wherein said first community comprises first frame number skew OFF1 and first frame header deviation Tm1 two parts, and the SFN-CFN observed time difference of described second community comprises second frame number skew OFF2 and second frame header deviation Tm2 two parts;
Then described timing difference computing unit is specifically for the timing difference calculating one or more cell set, described timing difference=(OFF1 × 38400+Tm1)-(OFF2 × 38400+Tm2).
9. controller according to claim 8, is characterized in that, cell selection unit also for:
According to the threshold value preset in the measuring object community that same-frequency measure reporting reports, select the candidate cell that community that UE received signal quality is better than described threshold value is alternatively concentrated; Or
The alternatively community, community of not triggering 1B/1F event is screened from same-frequency measure reporting; Or
In same-frequency measure reporting, screening triggers the alternatively community, community of 1A/1D event; Or
The candidate cell that the measuring object community reported by same-frequency measure reporting is all alternatively concentrated.
10. controller according to claim 7, it is characterized in that, described timing difference storage unit, specifically for the timing difference of each cell set is preserved as a record, wherein, described record at least comprises one of field below: the community ID of the first community and the second community or scrambling code number, timing difference between the first community and the second community, be used to indicate the validity field of described timing difference record.
11. controllers according to claim 10, is characterized in that, described timing difference storage unit comprises:
Record rise time storage unit, for keeping records rise time stamp or the time span of preserving the invalid moment point of this recording distance.
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| CN201110351831.XA CN103096456B (en) | 2011-11-08 | 2011-11-08 | The method for building up of synchronization link and controller |
| PCT/CN2012/084312 WO2013067950A1 (en) | 2011-11-08 | 2012-11-08 | Synchronization link establishment method and controller |
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| CN105099646A (en) * | 2014-05-14 | 2015-11-25 | 中兴通讯股份有限公司 | Synchronization link determination method and apparatus |
| US10609663B2 (en) | 2014-07-11 | 2020-03-31 | Qualcomm Incorporated | Techniques for reporting timing differences in multiple connectivity wireless communications |
| CN105592493A (en) * | 2014-10-24 | 2016-05-18 | 中兴通讯股份有限公司 | Detection method and apparatus of scrambling code conflict cell, and network element |
| EP3563601A4 (en) | 2016-12-27 | 2020-08-19 | Nokia Solutions And Networks System Technology (Beijing) Co., Ltd. | A connection setup method, user equipment, common central control node and communication system |
| CN111954294B (en) * | 2017-01-06 | 2021-08-20 | 华为技术有限公司 | Communication method, access network equipment and terminal |
| CN111818597B (en) * | 2020-06-16 | 2022-06-10 | 深圳磊诺科技有限公司 | LTE micro base station and cell parameter switching method thereof |
| WO2023155120A1 (en) * | 2022-02-18 | 2023-08-24 | Zte Corporation | Systmes and methods for indicating timing difference between different cells |
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| CN1614916A (en) * | 2003-11-03 | 2005-05-11 | 华为技术有限公司 | Soft switching method |
| CN1728869A (en) * | 2004-07-31 | 2006-02-01 | 华为技术有限公司 | Switch synchronization method for asynchronous CDMA system |
| CN1867174A (en) * | 2005-11-28 | 2006-11-22 | 华为技术有限公司 | Method for confirming multi-path location by soft handoff in base station |
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