CN102238655A - Hard handover method for user equipment (UE), hard handover indication method, UE and radio network controller (RNC) - Google Patents
Hard handover method for user equipment (UE), hard handover indication method, UE and radio network controller (RNC) Download PDFInfo
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- CN102238655A CN102238655A CN201010158099XA CN201010158099A CN102238655A CN 102238655 A CN102238655 A CN 102238655A CN 201010158099X A CN201010158099X A CN 201010158099XA CN 201010158099 A CN201010158099 A CN 201010158099A CN 102238655 A CN102238655 A CN 102238655A
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Abstract
The invention discloses a hard handover method for user equipment (UE), a hard handover indication method, the UE and a radio network controller (RNC), which solve the problem of relatively longer service interruption caused by a hard handover failure. The hard handover method for the UE comprises the following steps of: after a hard handover command is received, interrupting connection with an original cell, and performing handover to a target cell; and after physical layer synchronization with the target cell fails in a handover process, initiating cell updating if the hard handover command is determined to carry a cell updating instruction. The hard handover indication method for the UE comprises that: determining the hard handover of the UE is required, and when the UE is determined not to successfully transmit a signaling message to the original source, transmitting a hard handover command carrying the instruction of directly performing the cell updating to the UE. The invention optimizes a handover failure processing method in a conventional hard handover flow, and avoids the relatively longer service interruption of the UE after the hard handover failure.
Description
Technical field
The present invention relates to communication technical field, relate in particular to method and UE and RNC that a kind of UE carries out direct-cut operation and indication direct-cut operation.
Background technology
Direct-cut operation is the switching of being carried out in two base station asynchronous or different carrier frequency, in the 3G system, when carrying out direct-cut operation, general clearly indication is used to switch to the entry-into-force time point that newly is configured in user terminal UE of Target cell, behind the received letter of acceptance time point, UE interruption earlier is connected with former sub-district, utilize above-mentioned new configuration elder generation and Target cell to carry out physical layer synchronization (follow-up abbreviation is synchronous), if detect synchronization failure, then require UE to return to carry out the old configuration before the direct-cut operation, and carry out synchronously with former sub-district again, detect with former sub-district synchronously successfully after, send switch failure information to former sub-district, thereby finish this time handoff procedure.
But triggering UE at some carries out under the switch instances from former sub-district to Target cell, can exist UE after detecting the synchronization failure of Target cell, can finish physical layer synchronization with former sub-district again, but can not send signaling in the former sub-district of L2 course, be difficult to be implemented in former sub-district and receive the switch failure information of UE feedback, concrete condition as:
1) the carrying RRC of former sub-district (Radio Resource Control, radio resource control) the transmission channel TTI of signaling (Transmission Time Interval, Transmission Time Interval) taken place to change and not renewal synchronously of UE, be revised as frame as mode and divide multiplexing mode from the radio frames continuous dispensing, otherwise or.In this case, change has taken place in the receive mode that former sub-district receives signaling message, so UE utilizes old configuration when former sub-district sends switch failure information, and former sub-district can successfully not receive;
2) RLC of signaling RB (radio bearer, radio bearer) (Radio Link Control, radio link control) on the contrary size size is revised as immutable or and UE does not synchronously upgrade from variable.In this case, change has taken place in the signaling message form that former sub-district receives, so UE utilizes old configuration when former sub-district sends switch failure information, and former sub-district can successfully not receive;
3) physical channel of signaling RB is from HS-PDSCH (HS-Physical Downlink SharedChannel, High-Speed Physical Downlink Shared Channel)/HS-PUSCH (HS-Physical Uplink SharedChannel, the high-speed physical uplink shared channel) be revised as DPCH (special-purpose Common Control Physical Channel), otherwise or and UE does not upgrade synchronously.In this case, change has taken place in the transmission channel that former sub-district receives signaling message, so UE utilizes old configuration when former sub-district sends switch failure information, former sub-district is difficult to successfully receive the switch failure information of UE feedback.
Provide three kinds of UE and can finish physical layer synchronization with former sub-district again except top, but can not send outside the signaling scene in the former sub-district of L2 course, the scene that also may deposit other also this situation can occur.Prior art, in direct-cut operation, after if UE detects the synchronization failure of Target cell, no matter what situation all need be at former cell recovery synchronously and send switch failure information, if with former minizone physical layer can be synchronous, but the L2 layer can not correctly receive signaling message such as switch failure information that UE sends in former sub-district, this will cause UE can just find the incorrect switch failure information that receives of network side after the long period, as detect rlc layer generation unrecoverable error, in 5-10 second, just can initiate cell updating course then and attempt recovering wireless connections again under the Typical Disposition with network.As seen existing direct-cut operation fail processing method has caused longer service outage duration, has had a strong impact on user's impression.
Summary of the invention
Method and UE and RNC that the embodiment of the invention provides a kind of UE to carry out direct-cut operation and indication direct-cut operation are in order to optimize the processing of in the existing direct-cut operation flow process direct-cut operation being failed.
The invention provides the method that a kind of UE carries out direct-cut operation, comprising:
Receive and interrupt after the direct-cut operation order and being connected of former sub-district, and switch to Target cell;
After in handoff procedure, carrying out physical layer synchronization failure, determine to carry in the described direct-cut operation order when directly carrying out the cell update indication, initiate cell update with Target cell.
The present invention also provides a kind of method of indicating direct-cut operation, comprising:
Determine whether and to carry out direct-cut operation to UE; And
Determining and to carry out direct-cut operation to UE, and determine that described UE can not be successfully when former sub-district sends signaling message, carry the direct-cut operation order of directly carrying out the cell update indication to the UE transmission, the described cell update that directly carries out is indicated, and is used for indicating UE to detect with Target cell at handoff procedure and carries out directly carrying out cell update after the physical layer synchronization failure.
The present invention also provides a kind of user terminal UE that carries out direct-cut operation, comprising:
Trigger element is used to receive and interrupts after the direct-cut operation order and being connected of former sub-district, and switches to Target cell;
The cell update unit is used for determining to carry in the described direct-cut operation order when directly carrying out the cell update indication after handoff procedure and Target cell carry out the physical layer synchronization failure, initiates cell update.
The present invention also provides a kind of radio network controller (RNC) of indicating direct-cut operation, comprising:
Switch determining unit, be used to determine whether and carry out direct-cut operation to UE;
Switching command issues the unit, be used for determining and to carry out direct-cut operation to UE, and determine that described UE can not be successfully when former sub-district sends signaling message, carry the direct-cut operation order of directly carrying out the cell update indication to the UE transmission, the described cell update that directly carries out is indicated, and is used for indicating UE to detect with Target cell at handoff procedure and carries out directly carrying out cell update after the physical layer synchronization failure.
Utilize UE provided by the invention to carry out method and the UE and the RNC of direct-cut operation and indication direct-cut operation, have following beneficial effect: when UE behind the Target cell synchronization failure, according to directly carrying out the cell update indication in the direct-cut operation order, directly initiate the cell update flow process, attempt being connected with network recovery.Thereby can not successfully send under the situation of switching realization message, omit the step of attempting synchronously and send switch failure information in former sub-district, shorten the service disconnection time delay under the Target cell failed handoff scenario to former sub-district.
Description of drawings
Fig. 1 is a method for hard switching flow chart in the embodiment of the invention;
Fig. 2 is an indication method for hard switching flow chart in the embodiment of the invention;
Fig. 3 is for carrying out the user terminal structure figure of direct-cut operation in the embodiment of the invention;
Fig. 4 is the radio network controller structure chart of indication direct-cut operation in the embodiment of the invention.
Embodiment
Below in conjunction with drawings and Examples the direct-cut operation of the present invention's proposition and method, user terminal and the radio network controller of indication direct-cut operation are illustrated in greater detail.
In embodiments of the invention, the method that provides a kind of UE to carry out direct-cut operation can shorten the time delay that UE under the above-mentioned situation recovers wireless connections.As shown in Figure 1, this method comprises:
Step S101, UE receive and interrupt after the direct-cut operation order and being connected of former sub-district, and switch to Target cell;
When network side determines to carry out direct-cut operation to UE, issue the direct-cut operation order to UE, generally comprise in this switching command: new configuration and entry-into-force time point are used for clearly indicating being used for the entry-into-force time point that newly is configured in user terminal UE that UE switches to Target cell; Preferably, carry the entry-into-force time point in this direct-cut operation order, behind the entry-into-force time point in arriving described direct-cut operation order, UE interruption earlier is connected with former sub-district, utilize above-mentioned new configuration to begin to switch to Target cell, according to existing switching flow, elder generation and Target cell carry out physical layer synchronization in handoff procedure;
Whether step S102, UE determine to carry in the direct-cut operation order and directly carry out the cell update indication after detecting in handoff procedure and carrying out physical layer synchronization failure with Target cell, if, execution in step S103 then;
After UE and Target cell carry out the physical layer synchronization failure in the present embodiment, be different from prior art and realize message, but whether carry the indication of directly carrying out cell update in earlier definite direct-cut operation order no matter what situation all can also send to switch with former sub-district earlier synchronously.And network side can be according to former cell information, is determining to be difficult under former sub-district receives the situation of signaling message this indication to be set.
Step S103 carries in the direct-cut operation order when directly carrying out the cell update indication, initiates the cell update request and carries out cell update.
UE is according to directly carrying out the cell update indication, directly initiate the cell update request and carry out follow-up cell updating course to network side, attempt being connected with network recovery, thereby omitted the step of attempting physical layer synchronization in former sub-district and sending switch failure information, shorten the service disconnection time delay under the failed handoff scenario, improved user's impression.
Preferably, UE determines not carry in the direct-cut operation order when directly carrying out the cell update indication after detecting in handoff procedure and carrying out physical layer synchronization failure with Target cell, and also comprise: step S104, UE at first carry out physical layer synchronization with former sub-district.
Network side can receive the situation of signaling message in former sub-district for those, in the direct-cut operation order, do not carry and directly carry out the cell update indication, like this, UE detect carry out physical layer synchronization failure with Target cell after, synchronous with former sub-district earlier by original flow process.
Step S105, UE send switch failure information to former sub-district after detecting and carrying out physical layer synchronization success with former sub-district.
During concrete enforcement, can carry the sign of whether directly carrying out cell update in the direct-cut operation order, be designated first set point at this, indication UE directly carries out cell update after carrying out synchronization failure with Target cell, when this was designated second set point, indication UE was synchronous with former sub-district earlier after carrying out synchronization failure with Target cell.Certainly, also can in original direct-cut operation order, increase the sign of directly carrying out cell update, adopt the direct-cut operation order of original form for the synchronous situation in first and former sub-district for the situation that needs directly carry out direct-cut operation.Concrete performance is not limited thereto, and no longer enumerates here.
Because network side can obtain the former sub-district of UE and the information of Target cell, receive the configuration informations such as receive mode, receive channel and signaling message form of signaling message as former sub-district.Therefore network side can determine whether the UE that carries out direct-cut operation can successfully send signaling message to former sub-district.Preferably, carry the direct-cut operation order of directly carrying out the cell update indication in the present embodiment and determine that by network equipment described UE can not successfully issue when former sub-district sends signaling message.As determining that according to former cell information former sub-district receives in receive mode, receive channel and the signaling message form of signaling message any and UE and do not upgrade synchronously when changing, determine that described UE can not successfully send signaling message to former sub-district.
After former sub-district receives switch failure information, finish this time handoff procedure, thereby recover again being connected of UE and former sub-district, specifically recover connection procedure, no longer describe in detail here for existing process.
In embodiments of the invention two, a kind of method of indicating direct-cut operation is provided, as shown in Figure 2, this method comprises:
Step S201, network side determine whether and need carry out direct-cut operation to UE;
Network side specifically more the measurement report of reporting of user determine whether UE satisfies the direct-cut operation condition, sub-district leap etc. takes place as UE, when definite UE satisfies direct-cut operation condition needs and carries out direct-cut operation, definitely to issue direct-cut operation to UE.
Step S202 is determining and need carry out direct-cut operation to UE, determines that described UE whether can be successfully when former sub-district sends signaling message, if not, and execution in step S203;
Step S203 carries the direct-cut operation order of directly carrying out the cell update indication to the UE transmission, and the described cell update that directly carries out is indicated, and is used for indicating UE to detect with Target cell at handoff procedure and carries out directly carrying out cell update after the physical layer synchronization failure.
Determine that UE can not preferably, also comprise step S204 successfully when former sub-district sends signaling message: then in described direct-cut operation order, do not carry and directly carry out the cell update indication.
Determine in the present embodiment that described UE can not successfully send signaling message to former sub-district, specifically comprises:
Determine that former sub-district receives any change in receive mode, receive channel and the signaling message form of signaling message and UE when not upgrading synchronously according to former cell information and UE configuration information, determine that described UE can not successfully send signaling message to former sub-district, determine that UE can not successfully send signaling message to former sub-district when particularly, network side following three kinds of any situations of situation determine to occur according to former sub-district:
1) the carrying RRC of former sub-district (Radio Resource Control, radio resource control) the transmission channel TTI of signaling (Transmission Time Interval, Transmission Time Interval) change has taken place, otherwise as the mode from the radio frames continuous dispensing be revised as frame divide multiplexing mode or, and UE does not synchronously upgrade.In this case, change has taken place in the receive mode that former sub-district receives signaling message when UE switches, so UE utilizes old configuration such as original signaling message transmission means when former sub-district sends switch failure information, and former sub-district can successfully not receive;
2) RLC of signaling RB (radio bearer, radio bearer) (Radio Link Control, radio link control) on the contrary size size is revised as immutable or and UE does not synchronously upgrade from variable.In this case, change has taken place in the signaling message form that former sub-district receives signaling message, thus UE utilize old configuration as with original signaling message form when the former sub-district transmission switch failure information, former sub-district can successfully not receive;
3) physical channel of signaling RB is from HS-PDSCH (HS-Physical Downlink SharedChannel, High-Speed Physical Downlink Shared Channel)/HS-PUSCH (HS-Physical Uplink SharedChannel, the high-speed physical uplink shared channel) be revised as DPCH (special-purpose Common Control Physical Channel), otherwise or and UE does not upgrade synchronously.In this case, change has taken place in the receive channel that former sub-district receives signaling message, so UE utilizes old configuration such as original signaling message transmission channel when former sub-district sends switch failure information, former sub-district is difficult to successfully receive the switch failure information of UE feedback.
Since can not successfully send signaling message in these cases to former sub-district, can be not successful so send switch failure information yet.In the method for the indication direct-cut operation in the present embodiment, since in these cases in the direct-cut operation order, carried indication UE with the Target cell synchronization failure after directly carry out cell update, thereby omitted the unnecessary step of attempting physical layer synchronization in former sub-district and sending switch failure information, shorten the service disconnection time delay under the failed handoff scenario, improved user's impression.
In embodiments of the invention three, a kind of user terminal UE that carries out direct-cut operation is provided, as shown in Figure 3, this user terminal comprises: trigger element 301 is used to receive and interrupts after the direct-cut operation order and being connected of former sub-district, and switches to Target cell; Cell update unit 302 is used for determining to carry in the described direct-cut operation order when directly carrying out the cell update indication after handoff procedure and Target cell carry out the physical layer synchronization failure, initiates cell update.
Preferably, this user terminal also comprises: lock unit 303, be used for handoff procedure detect carry out physical layer synchronization failure with Target cell after, determine not carry in the described direct-cut operation order when directly carrying out the cell update indication, carry out physical layer synchronization with former sub-district; Switch failure information transmitting element 304 after being used for carrying out physical layer synchronization success with former sub-district, sends switch failure information to former sub-district.Network side can receive the situation of signaling message in former sub-district for those, in the direct-cut operation order, do not carry and directly carry out the cell update indication, like this, UE detect carry out physical layer synchronization failure with Target cell after, synchronous by original flow process and former sub-district.
The direct-cut operation order of directly carrying out the cell update indication of carrying that sub-district updating block 302 is determined in the present embodiment determines that by network equipment described UE can not successfully issue when former sub-district sends signaling message.Network determines that UE can not successfully send signaling message to former sub-district, specifically comprise: determine that former sub-district receives any change in receive mode, receive channel and the signaling message form of signaling message and UE when not upgrading synchronously according to former cell information, determine that described UE can not successfully send signaling message to former sub-district.Should comprise the situation example that provides among the top embodiment particularly.
In embodiments of the invention four, a kind of radio network controller (RNC) of indicating direct-cut operation also is provided, as shown in Figure 4, this radio network controller comprises:
Switch determining unit 401, be used to determine whether and carry out direct-cut operation to UE; Switching command issues unit 402, be used for determining and to carry out direct-cut operation to UE, and determine that described UE can not be successfully when former sub-district sends signaling message, carry the direct-cut operation order of directly carrying out the cell update indication to the UE transmission, the described cell update that directly carries out is indicated, and is used for indicating UE to detect with Target cell at handoff procedure and carries out directly carrying out cell update after the physical layer synchronization failure.
Preferably, described switching command issues that unit 402 specifically determines according to former cell information that former sub-district receives any change in receive mode, receive channel and the signaling message form of signaling message and UE when not upgrading synchronously, determines that described UE can not successfully send signaling message to former sub-district.
In the present embodiment in the radio network controller switching command issue unit 402 specifically also be used for determining UE can success when former sub-district sends signaling message, in the direct-cut operation order, do not carry the unit that directly carries out the cell update indication.Like this, for the situation that can successfully send signaling message to former sub-district, UE with the Target cell synchronization failure after, still at first can carry out physical layer synchronization with former sub-district, synchronous detecting success back sends switch failure information to former sub-district, finishes to recover to the switching of Target cell and being connected of former sub-district.
During concrete enforcement, can carry the sign of whether directly carrying out cell update in the direct-cut operation order, be designated first set point at this, indication UE directly carries out cell update after carrying out synchronization failure with Target cell, when this was designated second set point, indication UE was synchronous with former sub-district earlier after carrying out synchronization failure with Target cell.Certainly, also can in original direct-cut operation order, increase the sign of directly carrying out cell update, adopt the direct-cut operation order of original form for the synchronous situation in first and former sub-district for the situation that needs directly carry out direct-cut operation.Concrete performance is not limited thereto, and no longer enumerates here.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. a UE carries out the method for direct-cut operation, it is characterized in that, comprising:
Receive and interrupt after the direct-cut operation order and being connected of former sub-district, and switch to Target cell;
After in handoff procedure, carrying out physical layer synchronization failure, determine to carry in the described direct-cut operation order when directly carrying out the cell update indication, initiate cell update with Target cell.
2. the method for claim 1 is characterized in that, determines not carry in the described direct-cut operation order when directly carrying out the cell update indication, also comprises:
Carry out physical layer synchronization with former sub-district;
After carrying out physical layer synchronization success with former sub-district, send switch failure information to former sub-district.
3. method as claimed in claim 1 or 2 is characterized in that, carries the direct-cut operation order of directly carrying out the cell update indication and determines that by network side described UE can not successfully issue when former sub-district sends signaling message.
4. a method of indicating direct-cut operation is characterized in that, comprising:
Determine whether and to carry out direct-cut operation to UE; And
Determining and to carry out direct-cut operation to UE, and determine that described UE can not be successfully when former sub-district sends signaling message, carry the direct-cut operation order of directly carrying out the cell update indication to the UE transmission, the described cell update that directly carries out is indicated, and is used for indicating UE to detect with Target cell at handoff procedure and carries out directly carrying out cell update after the physical layer synchronization failure.
5. method as claimed in claim 4 is characterized in that, determines that UE can not successfully send signaling message to former sub-district, specifically comprises:
Determine that former sub-district receives any change in receive mode, receive channel and the signaling message form of signaling message and described UE when not upgrading synchronously according to former cell information, determine that described UE can not successfully send signaling message to former sub-district.
6. a user terminal UE who carries out direct-cut operation is characterized in that, comprising:
Trigger element is used to receive and interrupts after the direct-cut operation order and being connected of former sub-district, and switches to Target cell;
The cell update unit is used for determining to carry in the described direct-cut operation order when directly carrying out the cell update indication after handoff procedure and Target cell carry out the physical layer synchronization failure, initiates cell update.
7. UE as claimed in claim 6 is characterized in that, also comprises:
Lock unit, be used for handoff procedure detect carry out physical layer synchronization failure with Target cell after, determine not carry in the described direct-cut operation order when directly carrying out the cell update indication, carry out physical layer synchronization with former sub-district;
The switch failure information transmitting element after being used for carrying out physical layer synchronization success with former sub-district, sends switch failure information to former sub-district.
8. as claim 6 or 7 described UE, it is characterized in that the direct-cut operation order of directly carrying out the cell update indication of carrying that described cell update unit is determined determines that by network side described user terminal can not successfully issue when former sub-district sends signaling message.
9. a radio network controller (RNC) of indicating direct-cut operation is characterized in that, comprising:
Switch determining unit, be used to determine whether and carry out direct-cut operation to UE;
Switching command issues the unit, be used for determining and to carry out direct-cut operation to UE, and determine that described UE can not be successfully when former sub-district sends signaling message, carry the direct-cut operation order of directly carrying out the cell update indication to the UE transmission, the described cell update that directly carries out is indicated, and is used for indicating UE to detect with Target cell at handoff procedure and carries out directly carrying out cell update after the physical layer synchronization failure.
10. RNC as claimed in claim 9, it is characterized in that, described switching command issues that the unit specifically determines according to former cell information that former sub-district receives any change in receive mode, receive channel and the signaling message form of signaling message and described UE does not upgrade synchronously, determines that described UE can not successfully send signaling message to former sub-district.
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| CN101106517A (en) * | 2006-07-13 | 2008-01-16 | 大唐移动通信设备有限公司 | Traffic control method and RNC for high-speed downlink packet access |
| CN101128039A (en) * | 2006-08-16 | 2008-02-20 | 大唐移动通信设备有限公司 | Hard switching method in mobile communication and wireless network controller using this method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101106517A (en) * | 2006-07-13 | 2008-01-16 | 大唐移动通信设备有限公司 | Traffic control method and RNC for high-speed downlink packet access |
| CN101128039A (en) * | 2006-08-16 | 2008-02-20 | 大唐移动通信设备有限公司 | Hard switching method in mobile communication and wireless network controller using this method |
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