CN102036284B - Method and device for processing radio link failure under carrier aggregation scene - Google Patents
Method and device for processing radio link failure under carrier aggregation scene Download PDFInfo
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- CN102036284B CN102036284B CN 200910179379 CN200910179379A CN102036284B CN 102036284 B CN102036284 B CN 102036284B CN 200910179379 CN200910179379 CN 200910179379 CN 200910179379 A CN200910179379 A CN 200910179379A CN 102036284 B CN102036284 B CN 102036284B
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Abstract
The embodiment of the invention discloses a method and a device for processing radio link failure under a carrier aggregation scene, which can ensure that user equipment (UE) can reconstruct radio resource control (RRC) connection in time. One method provided by the invention comprises the following steps of: when the radio link failure of at least one downlink carrier is detected, or the radio link failure of at least one uplink carrier is detected, or the physical layer problem of at least one carrier is detected, or the random access failure of a random access channel (RACH) of at least one carrier is detected, starting radio link normality or failure judgment of all carriers, and/or starting a first timer. The other method provided by the invention comprises the following step of: when the need of RRC connection reconstruction is judged, selecting a carrier in a service aggregation cell or selecting a low-frequency carrier in the service aggregation cell to initiate an RRC signaling connection request.
Description
Technical field
The present invention relates to wireless communication field, particularly relate to processing method and the device of Radio Link Failure under a kind of carrier aggregation scene.
Background technology
In wireless communication system, (User Equipment, UE) carrier information that sends according to network side detects the signal quality of the neighbor cell that uses this carrier wave subscriber equipment.Strengthen for Long Term Evolution that (long-term evolution advance, LTE-A) carrier aggregation system such as system, UE may have a plurality of carrier waves of serving for its simultaneously, and the carrier aggregation under a base station is called aggregation cell.
When aggregation cell provided service for UE, UE can use a plurality of uplink and downlink carrier waves to carry out transfer of data simultaneously.If only there is part carrier wave (up and/or descending) that Radio Link Failure has taken place, UE still can not have carrier wave and the base station communication of failure by other.Have only whole carrier waves (descending and/or up) of working as that Radio Link Failure has all taken place, UE just judges Radio Link Failure, and (RadioResource Control, RRC) connection re-establishment process is recovered to be connected with the signaling of base station to initiate Radio Resource control.
In realizing process of the present invention, the inventor discovers and has such problem in the prior art at least:
Under carrier aggregation scene, because the physical layer assessment cycle difference of each carrier wave configuration, if Radio Link Failure (Radio Link Failure all takes place in whole carrier waves of UE, RLF), from UE detect first carrier wave wireless link failure to the time interval that detects last carrier wave wireless link failure can be very long, thereby cause UE can not start RRC connection re-establishment process in time, this is using the time delay urgency traffic for UE, VoIP (Voice Over IP for example, the IP speech) professional, so will make user's business experience variation Chang break period.
Summary of the invention
For guaranteeing that UE can rebuild RRC in time and connect, embodiments of the invention provide processing method and the device of Radio Link Failure under a kind of carrier aggregation scene.
On the one hand, the embodiment of the invention provides the processing method of Radio Link Failure under a kind of carrier aggregation scene, and described method comprises:
Detecting the Radio Link Failure of at least one descending carrier; perhaps; detect the Radio Link Failure of at least one up-link carrier; perhaps; detect at least one carrier wave and physical layer problem occurs, perhaps, the Random Access Channel RACH that detects at least one carrier wave is at random during access failure; startup is to the normal or failure judgement of Radio Link of whole carrier waves, and/or the startup first timer.
The embodiment of the invention provides the processing method of Radio Link Failure under the another kind of carrier aggregation scene, and described method comprises:
When judgement need be carried out the radio resource control RRC connection reconstruction, select the carrier wave in the service aggregating residential quarter to initiate RRC signaling connection request; Perhaps, select the low frequency carrier signal in the service aggregating residential quarter to initiate RRC signaling connection request.
The embodiment of the invention provides the processing method of Radio Link Failure under another carrier aggregation scene, and described method comprises:
According to the service quality QoS demand of business, be user device configuration Radio Link Failure detected parameters;
Send described Radio Link Failure detected parameters to described subscriber equipment; make described subscriber equipment detect the Radio Link Failure of at least one descending carrier; perhaps; detect the Radio Link Failure of at least one up-link carrier; perhaps; detect at least one carrier wave and physical layer problem occurs; perhaps; the Random Access Channel RACH that detects at least one carrier wave is at random during access failure, and it is normal or failure is judged or regularly start radio resource control RRC connection re-establishment process to use described Radio Link Failure detected parameters that whole carrier waves are carried out Radio Link.
On the other hand, the embodiment of the invention provides a kind of subscriber equipment, comprising:
Link is judged start unit, be used for detecting the Radio Link Failure of at least one descending carrier, perhaps, detect the Radio Link Failure of at least one up-link carrier, perhaps, detect at least one carrier wave and physical layer problem occurs, perhaps, the Random Access Channel RACH that detects at least one carrier wave is at random during access failure, starts the normal or failure of Radio Link to whole carrier waves and judges; And/or,
The timer start unit, be used for detecting the Radio Link Failure of at least one descending carrier, perhaps, detect the Radio Link Failure of at least one up-link carrier, perhaps, detect at least one carrier wave and physical layer problem occurs, perhaps, the Random Access Channel RACH that detects at least one carrier wave during access failure, starts first timer at random.
Simultaneously, the embodiment of the invention provides a kind of base station, comprising:
Parameter configuration unit is used for the service quality QoS demand according to business, is user device configuration Radio Link Failure detected parameters;
The parameter transmitting element; be used for sending described Radio Link Failure detected parameters to described subscriber equipment; make described subscriber equipment detect the Radio Link Failure of at least one descending carrier; perhaps; detect the Radio Link Failure of at least one up-link carrier; perhaps; detect at least one carrier wave and physical layer problem occurs; perhaps; the Random Access Channel RACH that detects at least one carrier wave is at random during access failure, and it is normal or failure is judged or regularly start radio resource control RRC connection re-establishment process to use described Radio Link Failure detected parameters that whole carrier waves are carried out Radio Link.
The technical scheme that is provided by the invention described above embodiment as can be known, by starting rapidly the wireless chaining status of whole carrier waves is judged, and/or start a timer, thereby guarantee that UE can in time start RRC connection re-establishment process, and when needs carry out the RRC connection reconstruction, initiate RRC signaling connection request by the low frequency carrier signal in the carrier wave in the selection service aggregating residential quarter or the selection service aggregating residential quarter simultaneously or separately, can guarantee that UE can rebuild RRC in time and connect, prevent from influencing because the UE service outage duration is long user's business experience.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The processing method schematic diagram of Radio Link Failure under a kind of carrier aggregation scene that Fig. 1 provides for the embodiment of the invention;
First kind of schematic diagram of rapidly wireless chaining status of whole carrier waves being judged that Fig. 2 provides for the embodiment of the invention;
Second kind of schematic diagram of rapidly wireless chaining status of whole carrier waves being judged that Fig. 3 provides for the embodiment of the invention;
The third schematic diagram of rapidly wireless chaining status of whole carrier waves being judged that Fig. 4 provides for the embodiment of the invention;
The processing method schematic diagram of Radio Link Failure under the another kind of carrier aggregation scene that Fig. 5 provides for the embodiment of the invention;
The processing method schematic diagram of Radio Link Failure under another carrier aggregation scene that Fig. 6 provides for the embodiment of the invention;
Fig. 7 forms schematic diagram for the functional unit of a kind of subscriber equipment that the embodiment of the invention provides;
Fig. 8 embodiment of the invention also provides a kind of functional unit of base station to form schematic diagram.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
See also Fig. 1, the processing method of Radio Link Failure under a kind of carrier aggregation scene that the embodiment of the invention provides, adopt following scheme to guarantee that UE rebuilds RRC in time and connects:
11, detect the Radio Link Failure of at least one descending carrier at UE, perhaps, detect the Radio Link Failure of at least one up-link carrier, perhaps, detect at least one carrier wave and physical layer problem occurs, perhaps, the Random Access Channel RACH that detects at least one carrier wave is at random during access failure
The wherein said physical layer problem that occurs refers to, when rrc layer is received N310 the step-out indication that physical layer sends continuously.
12, described UE starts the normal or failure judgement of Radio Link to whole carrier waves, and/or starts first timer.
Described UE to the Radio Link of whole carrier waves normal or failure judge; can be by the wireless link signals quality that detects all descending carriers or Radio Link control (the RadioLink Control that judges all up-link carriers by detection; RLC) whether layer surpasses automatic repeat requests (Automatic Repeat Request; ARQ) maximum retransmission; or (RandomAccess Channel, whether access at random RACH) is successful to pass through to detect the Random Access Channel of judging on all up-link carriers.
If judge whole descending carrier Radio Link Failure by detection, perhaps judge whole up-link carrier Radio Link Failure, perhaps judge whole up-link carrier RACH access failure at random, then UE just rebuilds the RRC connection, if judge the Radio Link of at least one up-link carrier and a descending carrier by detection normal, then UE just need not to rebuild the RRC connection.
Certainly, detect the Radio Link Failure of at least one descending carrier at UE, perhaps, detect the Radio Link Failure of at least one up-link carrier, perhaps, detect at least one carrier wave and physical layer problem occurs, perhaps, the Random Access Channel RACH that detects at least one carrier wave during access failure, also can start first timer at random individually or simultaneously, the duration of this first timer can reasonably be configured for UE by the service quality QoS demand of base station side according to the UE business.
Like this, when base station side did not dispose this first timer for UE, UE can judge whether to start RRC connection re-establishment process by detecting the Radio Link situation of whole carrier waves; When base station side disposed this first timer for UE separately, UE can start RRC connection re-establishment process immediately when this first timer is overtime; When base station side disposed this first timer for UE simultaneously, then before this first timer was overtime, if UE also can't judge the Radio Link situation of whole carrier waves by detection, then UE will be overtime at this first timer, starts RRC connection re-establishment process.
Wherein, step 12 can also comprise; when described descending carrier does not transmit UE control signaling; for example physical layer is shared control information PDCCH; described UE starts the normal or failure judgement of Radio Link to the part carrier wave; and/or the startup first timer, this part carrier wave is the carrier wave of the physical layer control information of transmission UE.
For this reason, the processing method of Radio Link Failure under the carrier aggregation scene that provides by the embodiment of the invention can guarantee that UE rebuilds RRC in time and connects, and prevents from influencing because the UE service outage duration is long user's business experience.
For the wireless chaining status to whole carrier waves rapidly judges that the present invention gives some preferred embodiments.
Embodiment one
See also Fig. 2, UE is detecting the Radio Link Failure of at least one descending carrier, perhaps, detect the Radio Link Failure of at least one up-link carrier, perhaps, detect at least one carrier wave and physical layer problem occurs, perhaps, the Random Access Channel RACH that detects at least one carrier wave during access failure, adopts following detection determining step at random:
21, UE uses the shortest physical layer assessment cycle to carry out Radio Link to whole descending carriers and detects.
UE is in discontinuous reception (Discontinuous Reception, DRX) each descending carrier of state, and use the shortest physical layer assessment cycle to carry out the quality evaluation of carrier wave to whole descending carriers reports synchronously or the step-out indication to rrc layer by waking up.
Wherein, physical layer assessment cycle length is relevant with the discontinuous reception of UE (DRX) cycle, because the DRX cycle of configuration is relevant with professional QoS demand, the DRX cycle that makes the QoS of different business to dispose at each carrier wave can be different, even differ bigger, will make physical layer assessment cycle difference on each carrier wave of UE like this.
If all carrier wave is judged Radio Link Failure RLF separately, because physical layer assessment cycle difference, make UE can not carry out RRC connection reconstruction process in time, and present embodiment detects by whole descending carriers being used the shortest physical layer assessment cycle carry out Radio Link, detects time delay thereby can shorten Radio Link.
The shortest physical layer assessment cycle can be disposed to UE with reference to UE ability, UE QoS of survice demand by the base station, also can be the physical layer assessment cycle that UE uses when carrier wave does not dispose DRX cycle.
Wherein, comprise the carrier wave of only controlling signaling for this UE physical layer for transmission when described whole descending carriers, the whole carrier waves told in the step 21 only are included as the carrier wave of this UE physical layer for transmission control information simultaneously and physical layer data, for example Independent Carrier Wave (Stand-alone CC).
22, to each descending carrier, the synchronous or step-out indication that the physical layer that described UE receives continuously according to rrc layer sends carries out Radio Link normally or failure is judged.
To this, present embodiment can adopt following dual mode fast detecting to go out the Radio Link situation of each descending carrier.
Mode one, when judging physical layer problem, the indication of minimizing judgement physical layer step-out is counted (N310), when the recovery physical layer problem, reduces the judgement physical layer synchronization and indicates count (N311) and judgement physical layer problem recovery time (T310).Wherein, N310, N311, T310 are the parameters of the rrc layer detection Radio Link Failure in the current standard agreement.
For this reason, base station side can dispose two groups of different Radio Link Failure detected parameters (N310 for UE, N311, T310), the rrc layer of UE can use to count than N310 step-out indication continuous indication still less judges existing physical layer problem, or/and use the physical layer problem shorter than T310 timer to recover the judgement cycle, or/and counting than N311 indication continuous indication still less synchronously, use judges the physical layer problem recovery.Like this, whether UE can carry out physical layer problem rapidly and judge, and judge physical layer problem rapidly and recover, thereby the Radio Link that detects each descending carrier rapidly is success or failure.
Mode two when physical layer problem appears in the rrc layer judgement of UE, is no longer carried out physical layer problem and is recovered, and directly judges the Radio Link Failure of this descending carrier.
This situation mainly is applicable to the scene of continuous carrier polymerization, and a plurality of continuous carrier transmission characteristics are similar to covering, if a carrier wave generation Radio Link Failure, Radio Link Failure also takes place continuous carrier probably with it.At this moment, can simplify deterministic process, be that the carrier set that carrier wave recovers judgement is not carried out in the UE configuration by base station side, when UE judges that physical layer problem appears in certain descending carrier, can not carry out the recovery process of descending carrier, directly judge this descending carrier Radio Link Failure.
Present embodiment be need to prove, to judging the descending carrier of Radio Link Failure, still need to carry out Radio Link constantly and whether recover normal monitoring during the normal or failure of Radio Link judges in that each descending carrier is carried out.This is because UE judges the moment difference of each descending carrier RLF, when a descending carrier is judged Radio Link Failure, but when waiting for the RLF judged result of other descending carriers, because the movement of UE or the variation of surrounding environment have judged that the descending carrier of Radio Link Failure recovers normal probably again.Thereby to judging the descending carrier of Radio Link Failure, UE still needs to continue carries out Radio Link and whether recovers normal monitoring.
Judge that the normal condition of link-recovery comprises: descending carrier is received physical layer N311 indication synchronously continuously, and perhaps, the correct transmission of the rlc layer designation data of up-link carrier or MAC layer designation data are correctly transmitted.And the descending carrier of having judged failure recovers again normally, and UE can recover report by RLF, or the Serving cell measurement report reports the base station.
Present embodiment detects by whole descending carriers being used the shortest physical layer assessment cycle carry out Radio Link; and the Radio Link Failure detected parameters of employing special configuration; perhaps simplify the deterministic process that physical layer problem is recovered, thereby can finish the judgement of the normal or failure of Radio Link to whole carrier waves rapidly.
Embodiment two
See also Fig. 3, UE is detecting the Radio Link Failure of at least one descending carrier, perhaps, detect the Radio Link Failure of at least one up-link carrier, perhaps, detect at least one carrier wave and physical layer problem occurs, perhaps, the Random Access Channel RACH that detects at least one carrier wave during access failure, adopts following detection determining step at random:
31, UE initiates RACH to whole up-link carriers and inserts at random;
32, if RACH inserts success at random at least one up-link carrier, then the Radio Link of judgment part up-link carrier and descending carrier is normal; If RACH access failure at random on whole up-link carriers is then judged all Radio Link Failure of up and/or whole descending carriers.
Wherein, UE can adopt the mode of serial or parallel to initiate RACH to whole up-link carriers to insert at random.
Corresponding serial mode, UE at first selects a up-link carrier initiation RACH to insert at random, if the RACH of this up-link carrier is access failure at random, then be chosen in successively again on other up-link carriers and initiate RACH and insert at random, until inserting success at random at RACH on the up-link carrier or until the access failure at random of RACH on whole up-link carriers.Corresponding parallel mode, UE then selects to initiate RACH at whole up-link carriers simultaneously and inserts at random.
If RACH inserts success at random at least one up-link carrier, then UE does not start RRC connection re-establishment process, if on whole up-link carriers RACH access failure at random, then UE will start RRC connection re-establishment process.
Wherein, comprise the carrier wave of only controlling signaling for this UE physical layer for transmission when described whole descending carriers, the whole carrier waves told in the step 32 only are included as the carrier wave of this UE physical layer for transmission control information simultaneously and physical layer data, for example Independent Carrier Wave (Stand-alone CC).
Present embodiment inserts at random by whole up-link carriers are initiated RACH; according to medium access control (Media Access Control; MAC) RACH of layer indication inserts at random and whether surpasses maximum retransmission, thereby finishes the judgement of the normal or failure of Radio Link to whole carrier waves rapidly.
Embodiment three
See also Fig. 4, UE is detecting the Radio Link Failure of at least one descending carrier, perhaps, detect the Radio Link Failure of at least one up-link carrier, perhaps, detect at least one carrier wave and physical layer problem occurs, perhaps, the Random Access Channel RACH that detects at least one carrier wave during access failure, adopts following any detection scheme at random:
41, UE time receives that in the rrc layer N continuous (AutomaticRepeat Request when ARQ) surpassing the indication of maximum retransmission, judges the Radio Link Failure of whole up-link carriers to the automatic repeat requests that rlc layer sends; Perhaps,
42, when UE receives for the first time that at rrc layer the ARQ of rlc layer transmission surpasses the indication of maximum retransmission, start second timer, before described second timer is overtime, if described rrc layer when the continuous or discontinuous ARQ that receives that N described rlc layer sends surpasses the indication of maximum retransmission again, is judged the Radio Link Failure of whole up-link carriers;
Wherein, the number of times of described N and base station side are that whole up-link carrier numbers of UE configuration are relevant; The duration of described second timer is base station side according to the QoS demand of business is the UE configuration.
Present embodiment adopts the signal quality to whole up-link carriers to carry out whole judgment mode, and up-link carrier ground is judged no longer one by one, therefore can finish the judgement that Radio Link to whole carrier waves is normal or fail rapidly.
For embodiment one and embodiment two, when UE detects one or more carrier wave wireless link failures, UE can by dedicated signaling or RACH at random access way report to current which the carrier wave generation Radio Link Failure in base station.If UE can receive the reconfiguration message of base station, then UE can judge the current part carrier wave generation Radio Link Failure that only has, UE can also with the service aggregating cell communication, do not need to rebuild RRC and connect.Wherein, the data that UE sends with dedicated signaling not only can be the Radio Link Failure reports, can also be the measurement reports that UE reports the base station, or signaling data.
If the RRC of UE by the base station connects layoutprocedure, or link-recovery detects and judges that whole Carrier States are all normal, and for descending carrier, UE will recover relevant with DRX cycle physical layer assessment cycle and carry out the Radio Link detection.
If UE successfully receives the rrc layer signaling message of base station side, for example RRC connects reconfiguration message, RRC connection release message or switching command etc.; Perhaps, UE successfully receives the packet that base station down sends; Perhaps the UE success sends the upstream data bag to the base station; Perhaps UE RACH on a up-link carrier inserts success at random, and then can to judge the Radio Link of at least one up-link carrier and a descending carrier normal for UE, represent this moment UE still can with the base station proper communication, need not to initiate RRC connection re-establishment process.
If UE judges whole descending carrier Radio Link Failure, perhaps judge whole up-link carrier Radio Link Failure, perhaps judge whole up-link carrier RACH access failure at random, perhaps when described first timer is overtime, UE will start RRC connection re-establishment process.
Rebuild the RRC connect hours for shortening UE, preferably, UE can select the carrier wave in the service aggregating residential quarter to initiate RRC signaling connection request; Perhaps, select the low frequency carrier signal in the service aggregating residential quarter to initiate RRC signaling connection request.
Initiate the RRC connection reconstruction immediately at UE, because the contextual information of UE is necessarily preserved in the service aggregating residential quarter before the Radio Link Failure, UE is when selecting suitable reconstruction residential quarter, can preferentially measure the carrier wave (residential quarter) in the service aggregating residential quarter, can guarantee that like this RRC connection reconstruction of UE is to the contextual residential quarter of UE is arranged.
Further, according to the frequency transmission characteristic of carrier wave, when a plurality of band transmission power were identical, the signal quality of the low frequency carrier signal at same position place was better than the signal quality of high frequency carrier.Thereby, not needing to take multiple measurements to shorten the connection reconstruction time delay in order to guarantee UE, UE can be preferentially begins to measure from the low frequency carrier signal of this service aggregating residential quarter.
Wherein, in the process that UE and base station keep being connected, can be by the base station by the rrc layer dedicated signaling, or system message sends to UE with the service aggregating cell aggregation information that disposes, this aggregation information comprises frequency and the Physical Cell Identifier of whole polymerization carrier waves, perhaps one or more low frequency carrier signal information.
Wherein, comprise the carrier wave of only controlling signaling for this UE physical layer for transmission when described whole descending carriers, the whole carrier waves told in the step 42 only are included as the carrier wave of this UE physical layer for transmission control information simultaneously and physical layer data, for example Independent Carrier Wave (Stand-alone CC).
In sum, the processing method of Radio Link Failure under the carrier aggregation scene that the embodiment of the invention provides, by starting rapidly the wireless chaining status of whole carrier waves is judged, and/or start a timer, thereby guarantee that UE can in time start RRC connection re-establishment process, and when needs carry out the RRC connection reconstruction, by selecting the carrier wave in the service aggregating residential quarter or selecting the low frequency carrier signal in the service aggregating residential quarter to initiate RRC signaling connection request, can guarantee that UE can rebuild RRC in time and connect, prevent from influencing because the UE service outage duration is long user's business experience.
Certainly, when needs carry out the RRC connection reconstruction, also can guarantee that UE can rebuild RRC in time and connect separately by shortening the connection reconstruction time delay.See also Fig. 5, the processing method of Radio Link Failure under the another kind of carrier aggregation scene that the embodiment of the invention provides, adopt following scheme to guarantee that UE rebuilds RRC in time and connects:
51, UE is judging when need carry out the radio resource control RRC connection reconstruction,
52, described UE selects the carrier wave in the service aggregating residential quarter to initiate RRC signaling connection request; Perhaps, select the low frequency carrier signal in the service aggregating residential quarter to initiate RRC signaling connection request.
Described judgement need be carried out the radio resource control RRC connection reconstruction and comprise: judge whole descending carrier Radio Link Failure, perhaps judge whole up-link carrier Radio Link Failure, perhaps judge whole up-link carrier RACH access failure at random.
Initiate the RRC connection reconstruction immediately at UE, because the contextual information of UE is necessarily preserved in the service aggregating residential quarter before the Radio Link Failure, UE is when selecting suitable reconstruction residential quarter, can preferentially measure the carrier wave (residential quarter) in the service aggregating residential quarter, can guarantee that like this RRC connection reconstruction of UE is to the contextual residential quarter of UE is arranged.
Further, according to the frequency transmission characteristic of carrier wave, when a plurality of band transmission power were identical, the signal quality of the low frequency carrier signal of same position was better than the signal quality of high frequency carrier.Thereby, not needing to take multiple measurements to shorten the connection reconstruction time delay in order to guarantee UE, UE can be preferentially begins to measure from the low frequency carrier signal of this service aggregating residential quarter.
Wherein, in the process that UE and base station keep being connected, can be by the base station by the rrc layer dedicated signaling, or system message sends to UE with the service aggregating cell aggregation information that disposes, this aggregation information comprises frequency and the Physical Cell Identifier of whole polymerization carrier waves, perhaps one or more low frequency carrier signal information.
Wherein, comprise the carrier wave of only controlling signaling for this UE physical layer for transmission when described whole descending carriers, the whole carrier waves told in the step 52 only are included as the carrier wave of this UE physical layer for transmission control information simultaneously and physical layer data, for example Independent Carrier Wave (Stand-alone CC).
The processing method of Radio Link Failure under the carrier aggregation scene that the embodiment of the invention provides, when needs carry out the RRC connection reconstruction, by selecting the carrier wave in the service aggregating residential quarter or selecting the low frequency carrier signal in the service aggregating residential quarter to initiate RRC signaling connection request, can guarantee that UE can rebuild RRC in time and connect, prevent because the UE service outage duration is long, thereby influence user's business experience.
See also Fig. 6, corresponding with above-mentioned method embodiment, the processing method of Radio Link Failure under another carrier aggregation scene that the embodiment of the invention provides comprises following content:
61, the base station is UE collocation wireless link failure detection parameter according to the service quality QoS demand of business;
62; described base station sends described Radio Link Failure detected parameters to described UE; make described UE detect the Radio Link Failure of at least one descending carrier; perhaps; detect the Radio Link Failure of at least one up-link carrier; perhaps; detect at least one carrier wave and physical layer problem occurs; perhaps; the Random Access Channel RACH that detects at least one carrier wave is at random during access failure, and it is normal or failure is judged or regularly start RRC connection re-establishment process to use described Radio Link Failure detected parameters that whole carrier waves are carried out Radio Link.
Described Radio Link Failure detected parameters comprises following arbitrary or combination:
The duration of first timer is used for described UE when described first timer is overtime, starts RRC connection re-establishment process.And/or,
The shortest physical layer assessment cycle length is used for described UE and uses this shortest physical layer assessment cycle that whole descending carriers are carried out Radio Link to detect.This shortest physical layer assessment cycle length is to be configured with reference to UE ability, UE QoS of survice demand by the base station.And/or,
The duration of second timer is used for described UE when rrc layer receives that for the first time the automatic repeat requests of rlc layer transmission surpasses the indication of maximum retransmission, starts this second timer; With before this second timer is overtime, if described rrc layer is when the continuous or discontinuous automatic repeat requests of receiving that N described rlc layer sends surpasses the indication of maximum retransmission again, judge the Radio Link Failure of whole up-link carriers, wherein, the number of times of N is relevant with whole up-link carrier numbers of UE.And/or,
Count than N310 step-out indication continuous indication still less, be used for described UE judgement and physical layer problem occurs; Than the shorter timer duration of T310 timer, be used for described UE and carry out physical layer problem recovery judgement; And/or, count than N311 indication continuous indication still less synchronously, be used for described UE judgement physical layer problem and recover.Wherein, N310, N311, T310 are the parameters of the rrc layer detection Radio Link Failure in the current standard agreement.
Wherein, comprise the carrier wave of only controlling signaling for this UE physical layer for transmission when described whole descending carriers, the whole carrier waves told in the step 62 only are included as the carrier wave of this UE physical layer for transmission control information simultaneously and physical layer data, for example Independent Carrier Wave (Stand-alone CC).
The concrete operation instruction of described Radio Link Failure detected parameters can not repeat them here correspondingly referring to the method embodiment of above-mentioned correspondence.
The processing method of Radio Link Failure under the carrier aggregation scene that the embodiment of the invention provides, be UE collocation wireless link failure detection parameter by the base station, make UE when the Radio Link that detects at least one carrier wave breaks down, can use this Radio Link Failure detected parameters that the state of whole carrier waves is judged rapidly or regularly start RRC connection re-establishment process, thereby can guarantee that UE can rebuild RRC in time and connect, prevent from having influence on because the UE service outage duration is long user's business experience.
Method embodiment based on above sees also Fig. 7, and the embodiment of the invention provides a kind of subscriber equipment, comprising:
Link is judged start unit 71, be used for detecting the Radio Link Failure of at least one descending carrier, perhaps, detect the Radio Link Failure of at least one up-link carrier, perhaps, detect at least one carrier wave and physical layer problem occurs, perhaps, the Random Access Channel RACH that detects at least one carrier wave is at random during access failure, starts the normal or failure of Radio Link to whole carrier waves and judges; And/or,
Timer start unit 72, be used for detecting the Radio Link Failure of at least one descending carrier, perhaps, detect the Radio Link Failure of at least one up-link carrier, perhaps, detect at least one carrier wave and physical layer problem occurs, perhaps, the Random Access Channel RACH that detects at least one carrier wave during access failure, starts first timer at random.
Wherein, described link judges that start unit 71 comprises following arbitrary module:
Physical layer judge module 711, being used for using the shortest physical layer assessment cycle to carry out Radio Link to whole descending carriers detects, and to each descending carrier, the synchronous or step-out indication that the physical layer of receiving continuously according to rrc layer sends carries out Radio Link normally or failure is judged;
Media access control layer judge module 712 is used for that whole up-link carriers are initiated RACH and inserts at random, if RACH inserts success at random at least one up-link carrier, then the Radio Link of judgment part up-link carrier and descending carrier is normal; If RACH access failure at random on whole up-link carriers is then judged all Radio Link Failure of up and/or whole descending carriers;
Wireless chain control layer judge module 713, the automatic repeat requests that the rlc layer that is used for receiving according to rrc layer sends surpasses the indication of maximum retransmission, whether the Radio Link of whole up-link carriers is failed judge.
Further, described physical layer judge module 711, can be used for particularly each descending carrier, use is counted than N310 step-out indication continuous indication still less and is judged existing physical layer problem, or/and use the physical layer problem shorter than T310 timer to recover the judgement cycle, or/and counting than N311 indication continuous indication still less synchronously, use judges the physical layer problem recovery; And when judging that physical layer problem is not recovered in the described recovery judgement cycle, judge the Radio Link Failure of this descending carrier.
Perhaps, to each descending carrier, when physical layer problem appears in the rrc layer judgement, no longer carry out physical layer problem and recover, directly judge the Radio Link Failure of this descending carrier.
Described media access control layer judge module 712, can at first select a up-link carrier to initiate RACH inserts at random, if the RACH of this up-link carrier is access failure at random, then be chosen in successively again on other up-link carriers and initiate RACH and insert at random, until inserting success at random at RACH on the up-link carrier or until the access failure at random of RACH on whole up-link carriers; Perhaps, selecting to initiate RACH at whole up-link carriers simultaneously inserts at random.
Described wireless chain control layer judge module 713 when the inferior automatic repeat requests of receiving that rlc layer sends of rrc layer N continuous surpasses the indication of maximum retransmission, is judged the Radio Link Failure of whole up-link carriers particularly; Perhaps, when rrc layer receives that for the first time the automatic repeat requests of rlc layer transmission surpasses the indication of maximum retransmission, start second timer, before described second timer is overtime, if described rrc layer when the continuous or discontinuous automatic repeat requests of receiving that N described rlc layer sends surpasses the indication of maximum retransmission again, is judged the Radio Link Failure of whole up-link carriers; Wherein, the number of times of described N is relevant with whole up-link carrier numbers of UE, and the duration of described second timer is the UE configuration by the base station according to the service quality QoS demand of business.
The subscriber equipment that the embodiment of the invention provides, also comprise connection reconstruction start unit 73, be used for judging whole descending carrier Radio Link Failure at described link judgement start unit 71, perhaps judge whole up-link carrier Radio Link Failure, perhaps judge whole up-link carrier RACH access failure at random, perhaps when the first timer of described timer start unit 72 startups is overtime, start RRC connection re-establishment process.
Preferably, this connection reconstruction start unit 73, the carrier wave that specifically is used in the selective polymerization residential quarter is initiated radio resource control RRC signaling connection request; Perhaps, the low frequency carrier signal in the selective polymerization residential quarter is initiated radio resource control RRC signaling connection request.
Initiate the RRC connection reconstruction immediately at UE, because the contextual information of UE is necessarily preserved in the service aggregating residential quarter before the Radio Link Failure, UE is when selecting suitable reconstruction residential quarter, therefore can preferentially measure the carrier wave (residential quarter) in the service aggregating residential quarter, can guarantee that like this RRC connection reconstruction of UE is to the contextual residential quarter of UE is arranged.Further, according to the frequency transmission characteristic of carrier wave, when a plurality of band transmission power were identical, the signal quality of the low frequency carrier signal at same position place was better than the signal quality of high frequency carrier.Thereby, not needing to take multiple measurements to shorten the connection reconstruction time delay in order to guarantee UE, UE can be preferentially begins to measure from the low frequency carrier signal of this service aggregating residential quarter.Wherein, in the process that UE and base station keep being connected, can be by the base station by the rrc layer dedicated signaling, or system message sends to UE with the service aggregating cell aggregation information that disposes, this aggregation information comprises frequency and the Physical Cell Identifier of whole polymerization carrier waves, perhaps one or more low frequency carrier signal information.
In sum, the subscriber equipment that the embodiment of the invention provides, rapidly the wireless chaining status of whole carrier waves is judged by 71 startups of link judgement start unit, and/or by timer start unit 72 startups one timer, thereby guarantee that UE can in time start RRC connection re-establishment process, and when needs carry out the RRC connection reconstruction, select the carrier wave in the service aggregating residential quarter or select the low frequency carrier signal in the service aggregating residential quarter to initiate RRC signaling connection request by connection reconstruction start unit 73, can guarantee that UE can rebuild RRC in time and connect, prevent from influencing because the UE service outage duration is long user's business experience.
Method embodiment based on above sees also Fig. 8, and the embodiment of the invention also provides a kind of base station, comprising:
This parameter configuration unit 81, the concrete duration that is used for the configuration first timer is used for described UE when described first timer is overtime, starts RRC connection re-establishment process; With or configuration indicate continuous indication still less to count than N310 step-out, be used for described UE judgement and physical layer problem occurs, with or the configuration timer duration shorter than T310 timer, be used for described UE and carry out physical layer problem recovery judgement, with or configuration count than N311 indication continuous indication still less synchronously, be used for described UE and judge that physical layer problem recovers.
The concrete operation instruction of described Radio Link Failure detected parameters can not repeat them here correspondingly referring to the method embodiment of above-mentioned correspondence.
The base station that the embodiment of the invention provides, by being UE collocation wireless link failure detection parameter, make UE when the Radio Link that detects at least one carrier wave breaks down, can use this Radio Link Failure detected parameters that the state of whole carrier waves is judged rapidly or regularly start RRC connection re-establishment process, thereby can guarantee that UE can rebuild RRC in time and connect, prevent from having influence on because the UE service outage duration is long user's business experience.
At last wireless link condition how to judge certain concrete carrier wave or whole carrier waves is made a brief description.
Scheme 1: the wireless link condition to certain concrete descending carrier is judged
Do not dispose DRX cycle at one or more carrier waves, perhaps, certain carrier wave has disposed DRX cycle, but in DRX cycle, if there are not data to receive, this carrier wave will be in resting state always, and not be waken up in continuous a plurality of DRX cycles.This programme can send by other carrier waves and activate and the some carrier waves of deexcitation, and the physical layer link state of this carrier wave is assessed.
UE adopts one with the incoherent physical layer of DRX cycle assessment cycle the physical layer link state of this carrier wave to be carried out periodic evaluation, or only when UE has data to receive startup and the incoherent physical layer of DRX cycle assessment cycle the physical layer link state of this carrier wave is assessed.Should can be the UE configuration by dedicated signaling by the base station with the incoherent physical layer of DRX cycle assessment cycle.
When UE has data to receive and receives the data time long enough, UE can be only carries out the Radio Link assessment of scenario time of reception in data; Be not enough to carry out the Radio Link assessment when UE has data to receive but receives data time, or UE do not have data to receive, UE can periodically wake up and carry out the Radio Link assessment of scenario.
By the physical layer assessment cycle of adopting one to have nothing to do with DRX cycle, when UE data received duration is not enough to judge Radio Link Failure, for example, rrc layer is received a plurality of continuous step-out indications but not enough N, rrc layer can't judge whether UE physical layer problem occurs, can guarantee that UE continues measurement and assesses out this carrier wave wireless link condition up to rrc layer this moment.
Scheme 2: the wireless link condition to certain concrete up-link carrier is judged
Mode one, UE is at the inferior automatic repeat requests of mixing (the Hybrid Automatic Repeat Request that receives that the MAC layer sends of rlc layer N continuous, when HARQ) surpassing the indication of maximum retransmission, by in this indication, carrying carrier index and/or carrier frequency point information, judge the Radio Link Failure of the up-link carrier of this HARQ entity correspondence.Perhaps,
Mode two, when UE receives for the first time that at rlc layer the HARQ of MAC layer transmission surpasses the indication of maximum retransmission, start the 3rd timer, before described the 3rd timer expiry, if described rlc layer is when the continuous or discontinuous HARQ that receives that N described MAC layer sends surpasses the indication of maximum retransmission again, by in this indication, carrying carrier index and/or carrier frequency point information, judge the Radio Link Failure of the up-link carrier of this HARQ entity correspondence;
Wherein, the number of times of described N is relevant with this carrier wave average throughput; Described the 3rd length of timer is base station side according to the QoS demand of business is the UE configuration.
This programme is added up the HARQ of each up-link carrier correspondence separately above the indication of maximum retransmission by rlc layer, can guarantee that UE can judge the up-link carrier that Radio Link Failure takes place accurately.
Scheme 3: the wireless link condition to whole up-link carriers is judged
Mode one, UE time receives that in the rrc layer N continuous (AutomaticRepeat Request when ARQ) surpassing the indication of maximum retransmission, judges the Radio Link Failure of whole up-link carriers to the automatic repeat requests that rlc layer sends; Perhaps,
Mode two, when UE receives for the first time that at rrc layer the ARQ of rlc layer transmission surpasses the indication of maximum retransmission, start the 4th timer, before described the 4th timer expiry, if described rrc layer when the continuous or discontinuous ARQ that receives that N described rlc layer sends surpasses the indication of maximum retransmission again, is judged the Radio Link Failure of whole up-link carriers;
Wherein, the number of times of described N and base station side are that whole up-link carrier numbers of UE configuration are relevant; Described the 4th length of timer is base station side according to the QoS demand of business is the UE configuration.
This programme adopts whole judgment mode to the signal quality of whole up-link carriers, and up-link carrier ground is judged no longer one by one, therefore can judge the wireless link condition of whole up-link carriers rapidly.
Those skilled in the art can also recognize, unit and the performing step of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software clearly is described, composition and the step of each example described in general manner according to function in the above description.These functions still are that software mode is carried out with hardware actually, depend on application-specific and the design constraint of technical scheme.Those skilled in the art can use distinct methods realize described function to each specific application, but this realization should not thought and exceeds scope of the present invention.
In conjunction with the method step that embodiment disclosed herein describes, the software module that can use hardware, processor to carry out, perhaps the combination of the two is implemented.Software module can place random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or the storage medium of other form arbitrarily.
Above-mentioned specific embodiment is not in order to limit the present invention; for those skilled in the art; all under the prerequisite that does not break away from the principle of the invention, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (17)
1. the processing method of Radio Link Failure under the carrier aggregation scene is characterized in that described method comprises:
Detect the Radio Link Failure of at least one descending carrier, perhaps, detecting the Radio Link Failure of at least one up-link carrier, perhaps, detect at least one carrier wave and physical layer problem occurs, perhaps, the Random Access Channel RACH that detects at least one carrier wave is at random during access failure
Startup is to the normal or failure judgement of Radio Link of whole carrier waves, and/or the startup first timer;
Judge the Radio Link Failure of whole carrier waves, perhaps when described first timer is overtime, starting radio resource control RRC connection re-establishment process.
2. processing method as claimed in claim 1 is characterized in that, described startup to the Radio Link of whole carrier waves normal or failure judge and comprise:
Using the shortest physical layer assessment cycle to carry out Radio Link to whole descending carriers detects;
To each descending carrier, the synchronous or step-out indication that the physical layer of receiving continuously according to the radio resource control RRC layer sends carries out Radio Link normally or failure is judged.
3. processing method as claimed in claim 2 is characterized in that, and is described to each descending carrier, the physical layer of receiving continuously according to the radio resource control RRC layer send synchronously or the step-out indication carry out the normal or failure of Radio Link and judge and comprise:
To each descending carrier, use is counted than N310 step-out indication continuous indication still less and is judged existing physical layer problem, or/and use the physical layer problem shorter than T310 timer to recover the judgement cycle, or/and counting than N311 indication continuous indication still less synchronously, use judges the physical layer problem recovery;
When judging that physical layer problem is not recovered in the described recovery judgement cycle, judge the Radio Link Failure of this descending carrier.
4. processing method as claimed in claim 2 is characterized in that, and is described to each descending carrier, the physical layer of receiving continuously according to the radio resource control RRC layer send synchronously or the step-out indication carry out the normal or failure of Radio Link and judge and comprise:
To each descending carrier, when physical layer problem appears in the rrc layer judgement, no longer carry out physical layer problem and recover, directly judge the Radio Link Failure of this descending carrier.
5. processing method as claimed in claim 2 is characterized in that, described startup to the Radio Link of whole carrier waves normal or failure judge and also comprise:
To judging the descending carrier of Radio Link Failure, still carry out Radio Link constantly and whether recover normal monitoring during the normal or failure of Radio Link judges in that each descending carrier is carried out.
6. processing method as claimed in claim 1 is characterized in that, described startup to the Radio Link of whole carrier waves normal or failure judge and comprise:
Whole up-link carriers are initiated RACH to be inserted at random;
If RACH inserts success at random at least one up-link carrier, then the Radio Link of judgment part up-link carrier and descending carrier is normal; If RACH access failure at random on whole up-link carriers is then judged all Radio Link Failure of up and/or whole descending carriers.
7. processing method as claimed in claim 6 is characterized in that, described whole up-link carriers initiation RACH are inserted at random comprises:
At first selecting a up-link carrier to initiate RACH inserts at random, if the RACH of this up-link carrier is access failure at random, then be chosen in successively again on other up-link carriers and initiate RACH and insert at random, until inserting success at random at RACH on the up-link carrier or until the access failure at random of RACH on whole up-link carriers;
Perhaps, selecting to initiate RACH at whole up-link carriers simultaneously inserts at random.
8. processing method as claimed in claim 1 is characterized in that, described startup to the Radio Link of whole carrier waves normal or failure judge and comprise:
When the inferior automatic repeat requests of receiving that Radio Link control rlc layer sends of radio resource control RRC layer N continuous surpasses the indication of maximum retransmission, judge the Radio Link Failure of whole up-link carriers; Perhaps,
When the radio resource control RRC layer receives that for the first time the automatic repeat requests of Radio Link control rlc layer transmission surpasses the indication of maximum retransmission, start second timer, before described second timer is overtime, if described rrc layer when the continuous or discontinuous automatic repeat requests of receiving that N described rlc layer sends surpasses the indication of maximum retransmission again, is judged the Radio Link Failure of whole up-link carriers;
Wherein, the number of times of described N is with all the up-link carrier number is relevant.
9. processing method as claimed in claim 1 is characterized in that, described startup radio resource control RRC connection re-establishment process comprises:
Select the carrier wave in the service aggregating residential quarter to initiate radio resource control RRC signaling connection request.
10. the processing method of Radio Link Failure under the carrier aggregation scene is characterized in that described method comprises:
When judgement need be carried out the radio resource control RRC connection reconstruction,
Select the carrier wave in the service aggregating residential quarter to initiate RRC signaling connection request.
11. the processing method of Radio Link Failure under the carrier aggregation scene is characterized in that described method comprises:
According to the service quality QoS demand of business, be user device configuration Radio Link Failure detected parameters;
Send described Radio Link Failure detected parameters to described subscriber equipment; make described subscriber equipment detect the Radio Link Failure of at least one descending carrier; perhaps; detect the Radio Link Failure of at least one up-link carrier; perhaps; detect at least one carrier wave and physical layer problem occurs; perhaps; the Random Access Channel RACH that detects at least one carrier wave is at random during access failure, and it is normal or failure is judged or regularly start radio resource control RRC connection re-establishment process to use described Radio Link Failure detected parameters that whole carrier waves are carried out Radio Link.
12. processing method as claimed in claim 11 is characterized in that, described Radio Link Failure detected parameters comprises following arbitrary or combination:
The duration of first timer is used for described subscriber equipment when described first timer is overtime, starts radio resource control RRC connection re-establishment process;
The duration of second timer is used for described subscriber equipment when the radio resource control RRC layer receives that for the first time the automatic repeat requests of Radio Link control rlc layer transmission surpasses the indication of maximum retransmission, starts this second timer;
Count than N310 step-out indication continuous indication still less, be used for described subscriber equipment judgement and physical layer problem occurs;
Than the shorter timer duration of T310 timer, be used for described subscriber equipment and carry out physical layer problem recovery judgement;
Count than N311 indication continuous indication still less synchronously, be used for described subscriber equipment judgement physical layer problem and recover.
13. a subscriber equipment is characterized in that, comprising:
Link is judged start unit, be used for detecting the Radio Link Failure of at least one descending carrier, perhaps, detect the Radio Link Failure of at least one up-link carrier, perhaps, detect at least one carrier wave and physical layer problem occurs, perhaps, the Random Access Channel RACH that detects at least one carrier wave is at random during access failure, starts the normal or failure of Radio Link to whole carrier waves and judges; And/or,
The timer start unit, be used for detecting the Radio Link Failure of at least one descending carrier, perhaps, detect the Radio Link Failure of at least one up-link carrier, perhaps, detect at least one carrier wave and physical layer problem occurs, perhaps, the Random Access Channel RACH that detects at least one carrier wave during access failure, starts first timer at random;
The connection reconstruction start unit is used for judging whole carrier wave wireless link failures at described link judgement start unit, perhaps when the first timer of described timer start unit startup is overtime, starts radio resource control RRC connection re-establishment process.
14. subscriber equipment as claimed in claim 13 is characterized in that, described link judges that start unit comprises following arbitrary module:
The physical layer judge module, being used for using the shortest physical layer assessment cycle to carry out Radio Link to whole descending carriers detects, and to each descending carrier, the synchronous or step-out indication that the physical layer of receiving continuously according to the radio resource control RRC layer sends carries out Radio Link normally or failure is judged;
The media access control layer judge module is used for that whole up-link carriers are initiated RACH and inserts at random, if RACH inserts success at random at least one up-link carrier, then the Radio Link of judgment part up-link carrier and descending carrier is normal; If RACH access failure at random on whole up-link carriers is then judged all Radio Link Failure of up and/or whole descending carriers;
The wireless chain control layer judge module, the automatic repeat requests that the Radio Link control rlc layer that is used for receiving according to the radio resource control RRC layer sends surpasses the indication of maximum retransmission, whether the Radio Link of whole up-link carriers is failed judge.
15. subscriber equipment as claimed in claim 13 is characterized in that, described connection reconstruction start unit, and the carrier wave that specifically is used in the selective polymerization residential quarter is initiated radio resource control RRC signaling connection request.
16. a base station is characterized in that, comprising:
Parameter configuration unit is used for the service quality QoS demand according to business, is user device configuration Radio Link Failure detected parameters;
The parameter transmitting element; be used for sending described Radio Link Failure detected parameters to described subscriber equipment; make described subscriber equipment detect the Radio Link Failure of at least one descending carrier; perhaps; detect the Radio Link Failure of at least one up-link carrier; perhaps; detect at least one carrier wave and physical layer problem occurs; perhaps; the Random Access Channel RACH that detects at least one carrier wave is at random during access failure, and it is normal or failure is judged or regularly start radio resource control RRC connection re-establishment process to use described Radio Link Failure detected parameters that whole carrier waves are carried out Radio Link.
17. base station as claimed in claim 16 is characterized in that, described parameter configuration unit, and the concrete duration that is used for the configuration first timer is used for described subscriber equipment when described first timer is overtime, starts radio resource control RRC connection re-establishment process; With or configuration indicate continuous indication still less to count than N310 step-out, be used for described subscriber equipment judgement and physical layer problem occurs, with or the configuration timer duration shorter than T310 timer, be used for described subscriber equipment and carry out physical layer problem recovery judgement, with or configuration count than N311 indication continuous indication still less synchronously, be used for described subscriber equipment and judge that physical layer problem recovers.
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