CN1741668A - Method for selecting user terminal switching mode by radio network controller - Google Patents
Method for selecting user terminal switching mode by radio network controller Download PDFInfo
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- CN1741668A CN1741668A CN 200410056952 CN200410056952A CN1741668A CN 1741668 A CN1741668 A CN 1741668A CN 200410056952 CN200410056952 CN 200410056952 CN 200410056952 A CN200410056952 A CN 200410056952A CN 1741668 A CN1741668 A CN 1741668A
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Abstract
A method of selecting user terminal switch - over mode by radio network controller includes sending switch - over mode supported by user terminal UE to radio network controller RNC in advance to let RNC obtain switch - over mode supported by UE , sending switch - over command to carry out UE switch - over by RNC according to switch - over mode supported by UE when UE is required to switch over , enabling RNC to know switch - over mode supported by UE with manner of carrying supported mode in RNC connection request message reported by UE and in repositioning request message sent by source RNC to object RNC as well as in ability information message reported by UE .
Description
Technical field
The present invention relates to the CDMA communication technology, in particular, the present invention relates to a kind of method of selecting user terminal UE switching mode at TD SDMA (TD-SCDMA, Time Division-Synchronization Code DivisionMultiple Access) radio network controller (RNC).
Background technology
At present, mobile communication has developed into 3G (Third Generation) Moblie (3G, Third Generation).One of three main standard of the TD-SCDMA 3G (Third Generation) Moblie that to be in May, 2000 approved by 3GPP by International Telecommunications Union (ITU, InternationalTelecommunication Union), March calendar year 2001.As the 3G standard of time division multiplexing mode, TD-SCDMA is used as the time-division multiplex technology scheme of low spreading rate (1.28MCps, 1.28 million chips/sec) in the ITU standard.
As a kind of time division duplex (TDD, Time Division Duplex) system, handoff technique is one of key technology of TD-SCDMA system wireless resource control, in the system handoff technique use the fine or not direct performance that influences system.Along with the development of handoff technique, switching can not only be satisfied user's mobility needs, and progressively becomes a kind of raising wireless resource utility efficiency, optimizes the important means of network quality.Switching is in order to guarantee mobile subscriber's communication continuity, or other reasons such as load Network Based and Operation and Maintenance, and the communication link that the user is current is transferred to the process of other sub-district.
At present, two kinds of switching modes of main existence in system: direct-cut operation and baton handover.
In direct-cut operation, UE is before Target cell sends business datum, go up to base station transmission ascending pilot frequency sign indicating number SYNC_UL at the UpPCH of Target cell UE (ascending pilot channel), the base station uses FPACH (physical access channel) to respond, set up between UE and base station synchronously, UE might temporarily interrupt with the transmission of the business between the network in this process, thereby causes professional damage.
In the baton handover process, UE at first sends data at Target cell, before the smart antenna of Target cell is finished downlink forming, UE continues to receive business datum in former sub-district, after one predefined period, Target cell smart antenna downlink figuration is finished, and UE just begins in Target cell sending and receiving business datum.Because UE does not need to carry out earlier UpPCH, FPACH synchronizing process, just can directly send business datum at Target cell, it is continuous therefore communicating by letter in the baton handover process at the UE that supports the baton handover mode, does not have service damage.
From last analysis as can be known, the service damage that baton handover has avoided direct-cut operation to bring is a special technology in the TD-SCDMA system.Yet still have two kinds of UE in present TD-SCDMA system: a kind of is the UE that supports baton handover, a kind of UE that does not support that baton handover adopts hard handover approach to switch.This just makes RNC know the information of UE switching capability in advance, and this selection to switching mode has great significance.
Yet, in present 3GPP standard, TD-SCDMA industry standard, do not report the description of switching capability about UE.Therefore RNC does not know whether UE has the ability of baton handover, can not carry out the selection of switching mode according to the switching capability of UE, this just causes RNC to carry out having certain blindness in the selection of UE switching mode, RNC may be to having the UE of baton handover ability, carry out direct-cut operation, thereby produce professional damage; To not having the UE of baton handover ability, send the baton handover order, and UE can not finish change action.
Summary of the invention
The problem that the present invention solves is that RNC does not know whether UE has the ability of baton handover in the prior art, causes RNC to carry out existing in the selection of UE switching mode the technical problem of certain blindness thus.
For addressing the above problem, the invention discloses the method that a kind of radio network controller is selected the user terminal switching mode, may further comprise the steps:
(1) user terminal UE is sent to radio network controller (RNC) with the switching mode of this terminal support in advance, so that RNC obtains the switching mode that UE supports;
(2) when UE need switch, the corresponding switching command of switching mode transmission that RNC supports according to this UE that obtains in advance carries out UE and switches.
Step (1) comprising:
Set up in the radio resource control RRC connection procedure at UE, the RRC connection request message that UE reports is carried the switching mode that this terminal is supported.Carry the switching mode that this terminal is supported among " indication of Access Layer version " Access stratum release indicator of RRC connection request message.
Step (1) comprising: in the Serving RNC repositioning process, " source RNC be sent to Target RNC transparent vessel " the Source RNC toTarget RNC Transparent Container of source RNC in the RELOCATION REQUEST message that Target RNC sends comprises UE wireless access capability UE radio accesscapability information, carries the switching mode that UE supports.
Step (1) comprising: carry out in the UE capability query process at network, " the UE wireless access capability UE radio access capability information " that comprises in the UE capability information message that UE reports is carried the switching mode that UE supports.
In above-mentioned dual mode, carry the switching mode that UE supports among " indication of Access Layer version " the Access stratum release indicator in UE wireless access capability information.
The switching mode that described UE supported comprises baton handover and direct-cut operation.Step (2) specifically comprises: (21) judge when radio network controller (RNC) whether network supports baton handover, if carry out step (22), otherwise send the direct-cut operation instruction to UE, carry out direct-cut operation; (22) radio network controller (RNC) judges whether to support baton handover according to the switching mode that UE supported that obtains in advance, if send the baton handover instruction, carries out baton handover, otherwise sends the direct-cut operation instruction, carries out direct-cut operation.
Described method is applicable to TDS-CDMA system (TD-SCDMA).
Compared with prior art, the present invention has the following advantages: RNC of the present invention is known the switching capability information of UE in advance, UE makes when need switch, RNC can in time select corresponding switching mode to send corresponding switching command, avoided the blindness selected in the prior art, thereby improved the efficient of switching, also avoided simultaneously supporting the UE of baton handover to carry out direct-cut operation, thereby caused service damage.
Description of drawings
Fig. 1 is the implementing procedure figure that radio network controller of the present invention is selected the user terminal switching mode;
Fig. 2 is that radio network controller obtains the first kind of realization flow figure that respectively knows the user terminal changing method among the present invention;
Radio network controller obtains the second kind of realization flow figure that respectively knows the user terminal changing method among Fig. 3 the present invention;
Fig. 4 obtains the third realization flow figure that respectively knows the user terminal changing method for radio network controller among the present invention.
Embodiment
Below in conjunction with accompanying drawing, specify the present invention.
The present invention is in present 3GPP standard, TD-SCDMA industry standard, set up the description that reports switching capability about UE, and utilize this description in advance the switching mode of this terminal support to be sent to RNC by UE, when UE need switch, RNC sends corresponding switching command according to the switching mode that UE supported that obtains in advance, thereby make RNC can carry out the selection of switching mode, the blindness when having avoided switching mode to select according to the switching capability of UE.
Below be that hard handover approach and baton handover mode are example with the switching mode that UE was supported, illustrate how RNC carries out the selection of UE switching mode.Need to prove, when UE supports the switching mode of other types such as soft handover, also can adopt with the same former reason RNC of the present invention and carry out the selection of switching mode.
See also Fig. 1, RNC selects the schematic flow diagram of UE switching mode.Mainly comprise the steps:
S110: user terminal UE is sent to radio network controller (RNC) with the switching mode of this terminal support in advance, so that RNC obtains the switching mode that UE supports;
S120: need switch UE when RNC judges, whether radio network controller (RNC) supports baton handover according to the configuration determination network of Operation and Maintenance, if carry out step S130, otherwise sends the direct-cut operation instruction, and UE carries out direct-cut operation;
S130: radio network controller (RNC) judges whether to support baton handover according to the switching mode that the user terminal UE that obtains is in advance supported, if send the baton handover instruction, UE carries out baton handover; Otherwise send the direct-cut operation instruction, UE carries out direct-cut operation.
In the implementation procedure of step S110, UE informs RNC by following 3 kinds of modes.
(1) when UE carries out the RRC connection request,, shows the switching capability of UE by " Access stratum release indicator " (indication of Access Layer version) in RRC CONNECTIONREQUEST (RRC connection request) message.
Before switching, can carry out the foundation of calling procedure earlier usually.With the audio call is example, and each UE and network side are at first set up RRC (Radio Resource control) and be connected and then set up Iu (core net and Radio Access Controller RNC interface) and be connected, set up subsequently service channel, could begin communication afterwards between the user UE.
Consider that might exist UE to connect in the access procedure at RRC just is accompanied by switching in real system, therefore be necessary in article one message of UE and network side, to carry the switching mode that UE supports, make RNC can just know the baton handover ability information of UE in the very first time.
RRC CONNECTION REQUEST message is mutual article one message between the rrc layer of the rrc layer of UE and RNC.UE initiates RRC by this message to RNC and connects the request of foundation, and RNC connects resource needed according to information entrained in the message for this UE distributes RRC after receiving this message.Yet, do not have the switching capability information of IE (Information Element, information element) in the RRC CONNECTION REQUEST message at present in order to inform that UE supports.Therefore, carry the switching mode that this terminal is supported in the RRC connection request message (RRC CONNECTION REQUEST) that UE reports, the switching mode that UE supports this UE according to predefined message format is included in the message and sends, equally, RNC resolves this message according to predefined message format, obtains the switching mode that UE supports.
Such as " Access stratum release indicator " (indication of Access Layer version) in RRC connection request message in order to deposit the switching mode that UE supports.As shown in table 1.
Table 1:RRC CONNECTION REQUEST message format
| Information Element/Group name | Need | Multi | Type and reference | Semantics description | Version |
| Message Type | MP | Message Type | |||
| UE information elements | |||||
| Initial UE identity | MP | Initial UE identity 10.3.3.15 | |||
| Establishment cause | MP | Establishment cause 10.3.3.11 | |||
| Protocol error indicator | MD | Protocol error indicator 10.3.3.27 | Default value is FALSE | ||
| ＞UE Specific Behaviour Information 1idle | OP | UE Specific Behaviour Information 1idle 10.3.3.51 | This IE shall not be included in this version of the protocol | ||
| Measurement information elements | |||||
| Measured results on RACH | OP | Measured results on RACH 10.3.7.45 | |||
| Access stratum release indicator | MP | Enumerated(REL-4， REL-4-baton handover Ability(1.28 Mcps TDD Only) ) | Absence of the IE implies R99. The IE also indicates the release of the RRC transfer syntax supported by the UE 14 spare values are needed | REL-4 |
See also Fig. 2, UE is when sending the RRC connection request message of RRC connection request, comprise the switching mode that this UE supports, for example comprise the switching mode that this UE supports among " the Access stratum releaseindicator " in RRC connection request message.Certainly, which IE of concrete message is in order to deposit the switching mode that this UE supports, as long as pre-set message format, RNC can obtain the switching mode that UE supported according to predefined message format and get final product from the IE of correspondence, be not limited to " Access stratum release indicator ".Agreement has 15 blank values for follow-up use now, and the present invention has taken a blank value and has been used for showing ability, shows that 14 blank values are for follow-up use in addition.
(2) in SRNC (Serving RNC) repositioning process, " Source RNC to Target RNCTransparent Container " (source RNC be sent to Target RNC transparent vessel) of source RNC in RELOCATION REQUEST (re-positioning request) message that Target RNC sends comprises " UE radio accesscapability (UE wireless access capability) information ", carries the switching mode that UE supports.
Regulation according to agreements such as 3GPP TS25.331, the RNC that strides at Iur (two RNC between logic interfacing) interface switches, strides that RNC switches, Inter-RAT (between the different radio connecting system) handoff procedure all might relate to the SRNS repositioning process when not having the Iur interface, therefore can when the SRNC reorientation takes place UE, the switching mode that this UE supported be sent to RNC.
Below switch to example between RNC to stride, UE takes place before the SRNC reorientation, ability information that UE is all and current resource allocation situation are all controlled by source RNC.When UE takes place will carry out one time interacting message between source RNC and the Target RNC in the SRNC repositioning process.The source RNC of that is to say can be the ability of UE, current resource allocation situation or the like information notification target RNC, thereby makes the Target RNC can be for this UE provides rationally, effective service.And these information all are to finish by the IE in the RELOCATION REQUEST message of Iu interface " Source RNC to Target RNC TransparentContainer ".Yet, this ability information is not provided in the present message structure.Therefore must make amendment to existing message structure.See also table 2, it sends the switching capability that UE supported for " UE radio access capability " in " Source RNC to Target RNCTransparent Container " made amendment so that it has.
Table 2:UE radio access capability
| Information Element/Group name | Need | Multi | Type and reference | Semantics description | Version |
| Access stratum release indicator | MP | Enumerated(R99) | Indicates the release of the UE according to[35]. The IE also indicates the release of the RRC transfer syntax supported by the UE.. | ||
| CV-not rrc con nectionSetupCo mplete | Enumerated(REL-4. REL-4-baton handover ability(1.28Mcps TDD Only) ) | 14 spare values are needed. | REL-4 | ||
| PDCP capability | MP | PDCP capability 10.3.3.24 | |||
| RLC capability | MP | RLC capability 10.3.3.34 | |||
| Transport channel capability | MP | Transport channel capability 10.3.3.40 | |||
| RF capability FDD | OP | RF capability FDD 10.3.3.33 |
| Information Element/Group name | Need | Multi | Type and reference | Semantics description | Version |
| RF capability TDD | OP | RF capability TDD 10.3.3.33b | One″TDD RF capability″entity shall be included for every Chip rate capability supported. | ||
| 1 to 2 | REL-4 | ||||
| Physical channel capability | MP | Physical channel capability 10.3.3.25 | |||
| UE multi-mode/multi-RAT capability | MP | UE multi-mode/multi-R AT capability 10.3.3.41 | |||
| Security capability | MP | Security capability 10.3.3.37 | |||
| UE positioning capability | MP | UE positioning capability 10.3.345 | |||
| Measurement capability | CH-fdd_req_sup | Measurement capability 10.3.3.21 |
See also Fig. 3, source RNC is when RELOCATION REQUEST message that Target RNC sends, IE therein: comprise the switching mode that this UE supports in " the UERadio Access Capability " of " Source RNC to Target RNC Transparent Container ", example is as shown in table 2 to comprise the switching mode that this UE supports at " Access Stratum release indicator ".Certainly, which IE of concrete message is in order to deposit the switching mode that this UE supports, as long as pre-set message format, RNC can obtain the switching mode that UE supported according to predefined message format and get final product from the IE of correspondence, be not limited to " Access stratum release indicator ".
(3) in UE capability query process, UE informs RNC with the switching mode that this terminal is supported.
In connecting the maintenance process, RNC can obtain the switching capability of UE by initiating UE capability query process.See also Fig. 4, at first, RNC sends capability query request (UE CapabilityEnquiry) to UE; Then, UE responds this request, beams back UE capability information message (UE CapabilityInformation); At last, RNC beams back UE ability information acknowledge message (UE Capability InformationConfirm).
Comprising " UE radio access capability " information in " UE Capability Information " lining, the modification of this " UE radio access capability " information shows the switching capability of UE with table 2 unanimity.When UE when sending the UE capability information message, the switching mode that local terminal is supported can be included in this message and send, for RNC, as long as its parsing can be obtained to comprise switching mode in interior UE ability information.
More than disclosed only be several specific embodiment of the present invention, but the present invention is not limited thereto, any those skilled in the art can think variation all should fall within the scope of protection of the present invention.
Claims (9)
1, a kind of radio network controller is selected the method for user terminal switching mode, it is characterized in that, may further comprise the steps:
(1) user terminal UE is sent to radio network controller (RNC) with the switching mode of this terminal support in advance, so that RNC obtains the switching mode that UE supports;
(2) when UE need switch, the corresponding switching command of switching mode transmission that RNC supports according to this UE that obtains in advance carries out UE and switches.
2, radio network controller as claimed in claim 1 is selected the method for user terminal switching mode, it is characterized in that step (1) comprising:
Set up in the radio resource control RRC connection procedure at UE, the RRC connection request message that UE reports is carried the switching mode that this terminal is supported.
3, radio network controller as claimed in claim 2 is selected the method for user terminal switching mode, it is characterized in that, carry the switching mode that this terminal is supported among " indication of Access Layer version " Access stratum releaseindicator of RRC connection request message.
4, radio network controller as claimed in claim 1 is selected the method for user terminal switching mode, it is characterized in that step (1) comprising:
In the Serving RNC repositioning process, " source RNC be sent to Target RNC transparent vessel " the Source RNC to Target RNC TransparentContainer of source RNC in the RELOCATION REQUEST message that Target RNC sends comprises UE wireless access capability UE radio access capability information, carries the switching mode that UE supports.
5, radio network controller as claimed in claim 1 is selected the method for user terminal switching mode, it is characterized in that, step (1) comprising: carry out in the UE capability query process at network, " the UE wireless access capability UE radio access capability information " that comprises in the UE capability information message that UE reports is carried the switching mode that UE supports.
6, select the method for user terminal switching modes as claim 4 or 5 described radio network controllers, it is characterized in that, carry the switching mode that UE supports among " indication of Access Layer version " the Accessstratum release indicator in UE wireless access capability information.
7, radio network controller as claimed in claim 1 is selected the method for user terminal switching mode, it is characterized in that the switching mode that described UE supported comprises baton handover and direct-cut operation.
8, radio network controller as claimed in claim 7 is selected the method for user terminal switching mode, it is characterized in that step (2) specifically comprises:
(21) judge when radio network controller (RNC) whether network supports baton handover,, otherwise send the direct-cut operation instruction, carry out direct-cut operation to UE if carry out step (22);
(22) radio network controller (RNC) judges whether to support baton handover according to the switching mode that UE supported that obtains in advance, if send the baton handover instruction, carries out baton handover, otherwise sends the direct-cut operation instruction, carries out direct-cut operation.
9, select the method for user terminal switching mode as any one described radio network controller in the claim 2,4,5, it is characterized in that described method is applicable to TDS-CDMA system.
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| CN102573070A (en) * | 2010-12-13 | 2012-07-11 | 中兴通讯股份有限公司 | Method and system for wireless resource allocation |
| CN103108367A (en) * | 2011-11-15 | 2013-05-15 | 中国移动通信集团公司 | Method and device for inter-system back cutting and equipment and terminal for inter-system back cutting |
| CN107872856A (en) * | 2016-09-28 | 2018-04-03 | 中国移动通信有限公司研究院 | A kind of method and device for reducing handover delay |
| CN107872856B (en) * | 2016-09-28 | 2020-10-02 | 中国移动通信有限公司研究院 | Method and device for reducing switching time delay |
| WO2018121347A1 (en) * | 2016-12-30 | 2018-07-05 | 夏普株式会社 | Method for reporting multi-connection transmission capability, method for configuring multi-connection transmission mode, method for preventing retransmission of data, ue and base station |
| WO2021068230A1 (en) * | 2019-10-12 | 2021-04-15 | Oppo广东移动通信有限公司 | Switching processing method, terminal device, and network device |
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| CN100441029C (en) | 2008-12-03 |
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