CN104219787A - Wireless link recovery method and device - Google Patents
Wireless link recovery method and device Download PDFInfo
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- CN104219787A CN104219787A CN201410458377.1A CN201410458377A CN104219787A CN 104219787 A CN104219787 A CN 104219787A CN 201410458377 A CN201410458377 A CN 201410458377A CN 104219787 A CN104219787 A CN 104219787A
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Abstract
An embodiment of the invention relates to the technical field of wireless communication, particularly to a wireless link recovery method and device and solves the conventional problem that under the dual connectivity network architecture, when failure occurs to the wireless link between UE (user equipment) and MeNB (master eNB), during the reconstruction of the wireless link, the break period of a data radio bearer is long. According to the arrangement, when the failure occurs to the wireless link of the MeNB, if serving cells of SeNB (secondary eNB) meet quality requirements of the channel, the UE performs a RRC (radio resource control) reconstruction by selecting one from the serving cells meeting the channel quality requirements rather than select the cell. Thus the wireless link recovery time is shortened, the break period of the data radio bearer is shortened, and the system performance is further improved.
Description
Technical field
The present invention relates to wireless communication technology field, particularly a kind of method and apparatus recovering wireless link.
Background technology
Under traditional network architecture, only there are wireless connections with between a base station in a UE (subscriber equipment), when this link quality degradation, after there occurs Radio Link Failure, lose unique connection between UE calcaneus rete network, need the suitable community of searching one again to recover the connection with network.
Under the hierarchical network that macrocell and small-cell form, wireless connections can be there are with multiple base-station node in UE simultaneously, the Radio Resource converging multiple base station is user data transmission service, and this is called dual link (dual connectivity) network architecture.
Dual link framework, refer to that UE has wireless link (i.e. Uu interface) with two base stations simultaneously, wherein only there is RRC (the Radio Resource Control having this UE special in a base station, wireless heterogeneous networks) entity, be called MeNB (Master eNB, dominant base); The RRC entity that another base station does not have this UE special, is called SeNB (Secondary eNB, slave base stations).Under MeNB base station, can Radio Resource be provided for network service for UE in You Yizu community, this group Serving cell be called MCG (Master Cell Group, main plot group); Meanwhile, under SeNB base station, also You Yizu community provides Radio Resource for network service for UE, and this group Serving cell is called SCG (Secondary Cell Group, subordinate cell set).
Due to the RRC entity only having UE special in main control base station MeNB, therefore RRC connection only exists between UE and MCG, and between UE and SCG, do not have RRC to connect.The signaling bear SRB of transmission RRC signaling message can only set up with between MeNB at UE, certain UE also can set up Deta bearer DRB for transfer of data with between MeNB, and the radio bearer (comprising signaling bear and Deta bearer) set up between UE and MeNB is called that MCG carries.Between UE and SeNB, do not have signaling bear, but can set up Deta bearer DRB for transfer of data, the radio bearer set up between UE and SeNB is called that SCG carries.
Under the dual link network architecture, when UE occurs unsuccessfully with the wireless link between MeNB, because RRC signaling message sends on this link, therefore UE must rebuild and be connected with the RRC of network.According to existing mechanism, UE needs triggering cell selection course, after selection suitable cell, initiates RRC rebuild request to it.After reconstruction completes, new serving BS reconfigures all Deta bearers.Need to carry out community in this process visible to select and RRC reconstruction, thus cause to increase the break period of Deta bearer.
In sum, at present under the dual link network architecture, when UE occurs unsuccessfully with the wireless link between MeNB, when carrying out wireless link and rebuilding, the break period of Deta bearer is long.
Summary of the invention
The invention provides a kind of method and apparatus recovering wireless link, under solving in prior art and there is the dual link network architecture, when UE occurs unsuccessfully with the wireless link between MeNB, when carrying out wireless link reconstruction, the problem that break period of Deta bearer is long.
A kind of method recovering wireless link that the embodiment of the present invention provides, comprising:
The wireless link of the subscriber equipment be connected with multiple network equipment between main network side equipment occurs unsuccessfully, determines the channel quality of each Serving cell in subordinate cell set SCG;
If there is the Serving cell meeting channel quality conditions in described SCG, then a Serving cell selected by described subscriber equipment from the Serving cell meeting channel quality conditions;
Described subscriber equipment initiates radio resource control RRC connection reconstruction to the described Serving cell selected.
Preferably, a Serving cell selected by described subscriber equipment from the Serving cell meeting channel quality conditions, comprising:
The top-quality Serving cell of described subscriber equipment selective channel from the Serving cell meeting channel quality conditions.
Preferably, according to following manner, described subscriber equipment judges whether Serving cell meets channel quality conditions:
For a Serving cell, described subscriber equipment, when at least one parameter that the channel quality of described Serving cell comprises is in the setting range of correspondence, determines that described Serving cell meets channel quality conditions;
Wherein, what the channel quality of described Serving cell comprised in following parameters is part or all of:
Channel quality indicator (CQI), order instruction RI and pre-coding matrix instruction PMI.
Preferably, described subscriber equipment initiates RRC connection reconstruction to the described Serving cell selected, and comprising:
The media access control MAC entity of main plot group MCG and SCG resets by described subscriber equipment, hang up all MCG carry and all SCG carry;
Described subscriber equipment sends RRC connection reconstruction request message to the described Serving cell selected.
Preferably, described MCG carries Signaling Radio Bearer SRB1 and SRB2 comprised between main network side equipment, and and main network side equipment between Data Radio Bearer DRB;
Described SCG carries all DRB comprised between undernet side apparatus.
Preferably, described subscriber equipment also comprises after determining the channel quality of each Serving cell in SCG:
If do not meet the Serving cell of channel quality conditions in described SCG, described subscriber equipment carries out cell selection procedure, and carries out RRC reconstruction to the community chosen.
A kind of subscriber equipment recovering wireless link that the embodiment of the present invention provides, described subscriber equipment is connected with multiple network equipment, and this subscriber equipment comprises:
Determination module, occurs unsuccessfully for the wireless link between main network side equipment, determines the channel quality of each Serving cell in subordinate cell set SCG;
Select module, if for there is the Serving cell meeting channel quality conditions in described SCG, then a Serving cell selected by described subscriber equipment from the Serving cell meeting channel quality conditions;
Rebuild module, for initiating radio resource control RRC connection reconstruction to the described Serving cell selected.
Preferably, described selection module specifically for:
The top-quality Serving cell of selective channel from the Serving cell meeting channel quality conditions.
Preferably, described selection module also for, judge whether Serving cell meets channel quality conditions according to following manner:
For a Serving cell, when at least one parameter that the channel quality of described Serving cell comprises is in the setting range of correspondence, determine that described Serving cell meets channel quality conditions;
Wherein, what the channel quality of described Serving cell comprised in following parameters is part or all of:
Channel quality indicator (CQI), order instruction RI and pre-coding matrix instruction PMI.
Preferably, described reconstruction module specifically for:
The media access control MAC entity of main plot group MCG and SCG is resetted, hang up all MCG carry and all SCG carry; RRC connection reconstruction request message is sent to the described Serving cell selected.
Preferably, described MCG carries Signaling Radio Bearer SRB1 and SRB2 comprised between main network side equipment, and and main network side equipment between Data Radio Bearer DRB;
Described SCG carries all DRB comprised between undernet side apparatus.
Preferably, described reconstruction module also for:
If do not meet the Serving cell of channel quality conditions in described SCG, carry out cell selection procedure, and carry out RRC reconstruction to the community chosen.
The embodiment of the present invention is after MeNB Radio Link Failure, if SeNB has the Serving cell meeting channel quality conditions, then described subscriber equipment omits cell selection procedure, but from the Serving cell that channel quality satisfies condition, select a Serving cell to carry out RRC reconstruction, decrease the wireless link recovery time, thus decrease the break period of Deta bearer, further increase systematic function.
Accompanying drawing explanation
Fig. 1 is the method flow schematic diagram that the embodiment of the present invention one recovers wireless link;
Fig. 2 is the method flow schematic diagram that the embodiment of the present invention two recovers wireless link;
Fig. 3 is the embodiment of the present invention three dual link configuration diagram;
Fig. 4 is the embodiment of the present invention four dual link configuration diagram;
Fig. 5 is the embodiment of the present invention five user device architecture schematic diagram;
Fig. 6 is the embodiment of the present invention six user device architecture schematic diagram.
Embodiment
The embodiment of the present invention is after MeNB Radio Link Failure, if SeNB has the Serving cell meeting channel quality conditions, then described subscriber equipment omits cell selection procedure, but from the Serving cell that channel quality satisfies condition, select a Serving cell to carry out RRC reconstruction, decrease the wireless link recovery time, thus decrease the break period of Deta bearer, further increase systematic function.
Below in conjunction with Figure of description, the embodiment of the present invention is described in further detail.
As shown in Figure 1, the method that the embodiment of the present invention one recovers wireless link comprises:
The wireless link of subscriber equipment between main network side equipment that step 101 is connected with multiple network equipment occurs unsuccessfully, determines the channel quality of each Serving cell in SCG;
If there is the Serving cell meeting channel quality conditions in the described SCG of step 102, then a Serving cell selected by described subscriber equipment from the Serving cell meeting channel quality conditions;
Step 103, described subscriber equipment initiate RRC connection reconstruction to the described Serving cell selected.
Wherein, if do not meet the Serving cell of channel quality conditions in described SCG, described subscriber equipment carries out cell selection procedure, and carries out RRC reconstruction to the community chosen.
If there is multiple Serving cell to meet channel quality conditions, can from the Serving cell meeting channel quality conditions Stochastic choice Serving cell.One preferably mode is, if there is multiple Serving cell to meet channel quality conditions, then and the top-quality Serving cell of described subscriber equipment selective channel from the Serving cell meeting channel quality conditions.
In force, according to following manner, described subscriber equipment judges whether Serving cell meets channel quality conditions:
For a Serving cell.Described subscriber equipment, when at least one parameter that the channel quality of described Serving cell comprises is in the setting range of correspondence, determines that described Serving cell meets channel quality conditions;
Wherein, what the channel quality of described Serving cell included but not limited in following parameters is part or all of:
CQI (Channel Quality Indicator, channel quality indicates), RI (Rank indicator, order indicates) and PMI (Precoding Matrix Indicator, pre-coding matrix indicates).
In force, the scope that each setting parameter one that can comprise for channel quality is corresponding, if comprise channel quality than channel quality to comprise CQI, then sets a scope A for CQI; If channel quality comprises RI and PMI, then set a scope B for RI, set a scope C for PMI.
If channel quality only includes a parameter, then when corresponding in Serving cell parameter is in the scope that this parameter is corresponding, determine that this server cell meets channel quality conditions.Such as channel quality only includes CQI, if when the CQI of Serving cell 1 correspondence is in the scope A that CQI is corresponding, determines that Serving cell 1 meets channel quality conditions.
If channel quality comprises multiple parameter, then when the part or all of parameter in multiple parameters that Serving cell is corresponding is in the scope that each autoregressive parameter is corresponding, determine that this server cell meets channel quality conditions.Such as channel quality only includes RI and PMI, if only need partial parameters in scope, when then the RI of Serving cell 2 correspondence is in the scope B that RI is corresponding, determine that Serving cell 2 meets channel quality conditions, or the PMI of Serving cell 2 correspondence in the scope C that PMI is corresponding time, determine that Serving cell 2 meets channel quality conditions; If desired all parameter is in scope, then the RI of Serving cell 2 correspondence is in the scope B that RI is corresponding, and the PMI of Serving cell 2 correspondence in the scope C that PMI is corresponding time, determine that Serving cell 2 meets channel quality conditions.
Wherein, described subscriber equipment initiates RRC connection reconstruction to the described Serving cell selected, and comprising:
MAC (Medium Access Control, the medium education) entity of MCG and SCG resets by described subscriber equipment, hang up all MCG carry and all SCG carry;
Described subscriber equipment sends RRC connection reconstruction request message to the described Serving cell selected.
Preferably, described MCG carries Signaling Radio Bearer SRB (the Signalling Radio Bearer comprised between main network side equipment, Signaling Radio Bearer) 1 and SRB2, and and main network side equipment between DRB (Data Radio Bearer, Data Radio Bearer);
Described SCG carries all DRB comprised between undernet side apparatus.
As shown in Figure 2, the method that the embodiment of the present invention two recovers wireless link comprises:
Step 200, UE detect the Radio Link Failure between MeNB.
Step 201, UE judge that whether there is channel quality in SCG meets pre-conditioned Serving cell, if so, then perform step 202; Otherwise perform existing community to select and RRC process of reconstruction.
The MAC entity of MCG and SCG resets by step 202, UE, hang up all MCG and carry (except SRB0), and all SCG carries.
Step 203, UE send RRC connection reconstruction request message to the Serving cell meeting channel condition.
After the SeNB of step 204, management service community receives request, if there is no the context of UE, the context of this UE is then obtained from MeNB, and accept the reconstruction request of UE, RRC connection reconstruction message is sent to UE, if SeNB base station has the context of UE, then send RRC connection reconstruction message directly to UE, in message, comprise wireless resource configuration.
Step 205, UE receive RRC connection reconstruction message, according to the configuration information recovery SRB1 in message, then activate new safe key KeNB, return RRC connection reconstruction complete message to SeNB.
Step 206, new serving BS (i.e. above-mentioned SeNB) send RRC to UE and connect reallocation message, wherein comprise SRB2, wireless resource configuration that former MCG and SCG Deta bearer is corresponding; Alternatively, Deta bearer configuration information that will be newly-built can also be comprised.
After step 207, UE receive RRC connection reconfiguration message, according to the configuration information recovery SRB2 in message, and former MCG and SCG Deta bearer; Alternatively, new Deta bearer can also be set up, then return RRC connection to serving BS and reshuffled message.
Step 208, serving BS actuate path upgrades (Path Switch) process, by E-UTRAN (the Evolved Universal Terrestrial Radio Access Network corresponding to signaling bear and DRB, the general land wireless network of evolution) RAB (Evolved Radio Access Bearer, evolution access radio bearer) downlink transmission path cut turn (path switch) to new transport layer address and GTP (GPRS Tunneling Protocol, general packet bag Radio Service Tunneling Protocol) TEID (Tunnel Endpoint Identity, Tunnel End Point Identifier).
In force, subscriber equipment can be connected with multiple base station simultaneously, and one of them is dominant base, other from base station.Dominant base can be the base station that transmitting power is high, such as Macro eNB (grand evolution base station), also can be the base station that transmitting power is low, such as pico eNB (micro-evolution base station), HNB (Home NodeB, Home eNodeB);
Can be low power base station, such as pico eNB, HNB from base station.
Enumerate two examples below, the scheme of the embodiment of the present invention is described.
Radio Link Failure between example one, UE and MeNB, only comprises a Serving cell in SCG, UE selects this SCG Serving cell to carry out connection reconstruction, specifically can see Fig. 3.
1) UE connects with Macro eNB 1 and pico eNB 1 simultaneously, and only have community M1 to provide service for UE in Macro eNB1, JiMCGJin You community M1 form, and pico eNB1 Zhong Jinyou community P1 is that UE serves, and namely SCG is only made up of P1; Have signaling bear SRB1 and SRB2 between UE and M1, and one has three DRB 2/3/4 between DRB1, UE and P1.
2) when UE moves to the border of M1 community, Radio Link Failure occurs, the value of channel quality CQI, RI and the PMI of the SCG carrying now between UE and P1 is all positioned at default scope.
3) MAC entity of MCG and SCG resets by UE, hangs up SRB1, SRB2, DRB1, DRB 2, DRB 3 and DRB 4, UE and initiates RRC reconstruction request to community P1.
4) if pico eNB1 does not also have the contextual information of UE, then obtain the context of this UE from macro eNB1, and according to context, accept the reconstruction request of UE, send " RRC connection reconstruction " message to UE.
5) after UE receives RRC connection reconstruction, again recover SRB1, apply new key K eNB, UE returns RRC connection reconstruction to P1 and completes message.
6) managing the pico eNB1 of P1 receives after reconstruction completes message, thinks that RRC connection reconstruction process completes; Pico eNB1 distributes the resource needed for SRB2 and DRB1 radio bearer for community P1, is resource and the configuration continuation maintenance of DRB 2/3/4 distribution, then sends RRC connection reconfiguration message to UE, wherein comprise the configuration information of SRB2 and DRB 1/2/3/4.
7) the RRC connection reconfiguration message that UE receives is the Article 1 reallocation message after process of reconstruction, carrying configuration is carried out according to the information comprised in message, recover SRB2 and Deta bearer DRB1, DRB2, DRB3 and DRB4, UE returns RRC connection to pico eNB1 and has reshuffled message.
8) pico eNB1 actuate path renewal process, cuts the transport layer address forwarding pico eNB1 to and corresponding GTP TEID by the downlink transfer passage of E-UTRAN Radio Access Bearer corresponding for all radio bearers.
Radio Link Failure between example two, UE and MeNB, comprises multiple Serving cell in SCG, connection reconstruction is carried out in the Serving cell that UE selects the channel quality in former SCG best, specifically can see Fig. 4.
1) UE connects with Macro eNB 1 and pico eNB 1 simultaneously, and only have community M1 to provide service for UE in Macro eNB1, JiMCGJin You community M1 form, and the community P1 of pico eNB1 control and community P2, for UE provides Radio Resource, forms SCG jointly; Signaling bear SRB1 and SRB2 is had between UE and M1, and a Deta bearer DRB1, have a Deta bearer DRB 2 between UE and community P1, and between the P2 of community, have two Deta bearer DRB 3 and DRB 4.
2) when UE moves to the border of M1 community, Radio Link Failure occurs, and the channel quality CQI value of the now carrying of UE and community P1 and community P2 is all positioned at the scope of setting, but the channel quality CQI of P2 more will be better than the channel quality CQI of P1.
3) MAC entity of MCG and SCG resets by UE, hangs up SRB1, SRB2, DRB1, DRB 2, DRB 3 and DRB 4, initiates RRC rebuild request to community P2.
4) if pico eNB1 does not also have the contextual information of UE, then obtain the context of this UE from macro eNB1, and according to context, accept the reconstruction request of UE, send RRC connection reconstruction message to UE, in message, comprise wireless resource configuration.
5) after UE receives RRC connection reconstruction, again recover SRB1, apply new key K eNB, UE returns RRC connection reconstruction to P2 and completes message.
6) what manage the pico eNB1 of P2 receives after reconstruction completes message, thinks that RRC connection reconstruction process completes; The resource of pico eNB1 needed for community P2 distribution SRB2 and DRB1 radio bearer, be originally resource and the configuration continuation maintenance of DRB2, DRB 3 and DRB 4 distribution, then send RRC to UE and connect reconfiguration message, wherein comprise the configuration information of SRB2 and DRB 1/2/3/4;
7) the RRC connection reconfiguration message that UE receives is the Article 1 reallocation message after process of reconstruction, carrying configuration is carried out according to the information comprised in message, recovery SRB2 and Deta bearer DRB1/2/3/4, UE return RRC connection to pico eNB1 and have reshuffled message;
8) pico eNB1 actuate path renewal process, cuts the transport layer address forwarding pico eNB1 to and corresponding GTPTEID by the downlink transfer passage of E-UTRAN Radio Access Bearer corresponding for all radio bearers.
Based on same inventive concept, a kind of network equipment is additionally provided in the embodiment of the present invention, the principle of dealing with problems due to this equipment is similar to the method that the embodiment of the present invention recovers wireless link, and therefore the enforcement of this equipment see the enforcement of method, can repeat part and repeat no more.
As shown in Figure 5, the subscriber equipment of the embodiment of the present invention five is connected with multiple network equipment, and this subscriber equipment comprises: determination module 500, selection module 501 and reconstruction module 502.
Determination module 500, occurs unsuccessfully for the wireless link between main network side equipment, determines the channel quality of each Serving cell in SCG;
Select module 501, if for there is the Serving cell meeting channel quality conditions in described SCG, then a Serving cell selected by described subscriber equipment from the Serving cell meeting channel quality conditions;
Rebuild module 502, for initiating RRC connection reconstruction to the described Serving cell selected.
Preferably, described selection module 501 specifically for:
The top-quality Serving cell of selective channel from the Serving cell meeting channel quality conditions.
Preferably, described selection module 501 also for, judge whether Serving cell meets channel quality conditions according to following manner:
For a Serving cell, when at least one parameter that the channel quality of described Serving cell comprises is in the setting range of correspondence, determine that described Serving cell meets channel quality conditions;
Wherein, what the channel quality of described Serving cell comprised in following parameters is part or all of:
CQI, RI and PMI.
Preferably, described reconstruction module 502 specifically for:
The MAC entity of main plot group MCG and SCG is resetted, hang up all MCG carry and all SCG carry; RRC connection reconstruction request message is sent to the described Serving cell selected.
Preferably, described MCG carries Signaling Radio Bearer SRB1 and SRB2 comprised between main network side equipment, and and main network side equipment between DRB;
Described SCG carries all DRB comprised between undernet side apparatus.
Preferably, described reconstruction module 502 also for:
If do not meet the Serving cell of channel quality conditions in described SCG, carry out cell selection procedure, and carry out RRC reconstruction to the community chosen.
As shown in Figure 6, the subscriber equipment of the embodiment of the present invention six is connected with multiple network equipment, and this subscriber equipment comprises:
Processor 601, for reading the program in memory 604, performs following process:
Wireless link between main network side equipment occurs unsuccessfully, determines the channel quality of each Serving cell in SCG; If there is the Serving cell meeting channel quality conditions in described SCG, then a Serving cell selected by described subscriber equipment from the Serving cell meeting channel quality conditions; RRC connection reconstruction is initiated to the described Serving cell selected by transceiver 602;
Transceiver 602, for receiving and sending data under the control of processor 601.
Preferably, described processor 601 specifically for:
The top-quality Serving cell of selective channel from the Serving cell meeting channel quality conditions.
Preferably, described processor 601 also for, judge whether Serving cell meets channel quality conditions according to following manner:
For a Serving cell, when at least one parameter that the channel quality of described Serving cell comprises is in the setting range of correspondence, determine that described Serving cell meets channel quality conditions;
Wherein, what the channel quality of described Serving cell comprised in following parameters is part or all of:
CQI, RI and PMI.
Preferably, described processor 601 specifically for:
The MAC entity of main plot group MCG and SCG is resetted, hang up all MCG carry and all SCG carry; RRC connection reconstruction request message is sent to the described Serving cell selected.
Preferably, described MCG carries Signaling Radio Bearer SRB1 and SRB2 comprised between main network side equipment, and and main network side equipment between DRB;
Described SCG carries all DRB comprised between undernet side apparatus.
Preferably, described processor 601 also for:
If do not meet the Serving cell of channel quality conditions in described SCG, carry out cell selection procedure, and carry out RRC reconstruction to the community chosen.
In figure 6, bus architecture (representing by bus 600), bus 600 can comprise interconnected bus and the bridge of any amount, and the various electrical chains comprising the memory that one or more processor of being represented by processor 601 and memory 604 represent are connected together by bus 600.Other electrical chains various of such as ancillary equipment, pressurizer and management circuit etc. and so on can also be connected together by bus 600, and these are all known in the field, therefore, are no longer described further it herein.Bus interface 603 provides interface between bus 600 and transceiver 602.Transceiver 602 can be an element, also can be multiple element, such as multiple receiver and transmitter, is provided for the unit communicated with other devices various over a transmission medium.The data that treated device 601 processes are transmitted on the radio medium by antenna 605, and further, antenna 605 also receives data and sends data to processor 601.
Processor 601 is in charge of bus 600 and common process, can also provide various function, comprises timing, peripheral interface, voltage-regulation, power management and other controlling functions.And memory 604 can be used to the data that storage of processor 601 uses when executable operations.
Optionally, processor 601 can be CPU (centre buries device), ASIC (Application Specific Integrated Circuit, application-specific integrated circuit (ASIC)), FPGA (Field-Programmable Gate Array, field programmable gate array) or CPLD (Complex Programmable Logic Device, CPLD).
It can be seen from the above: the embodiment of the present invention is after MeNB Radio Link Failure, if SeNB has the Serving cell meeting channel quality conditions, then described subscriber equipment omits cell selection procedure, but from the Serving cell that channel quality satisfies condition, select a Serving cell to carry out RRC reconstruction, decrease the wireless link recovery time, thus decrease the break period of Deta bearer, further increase systematic function.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (12)
1. recover a method for wireless link, it is characterized in that, the method comprises:
The wireless link of the subscriber equipment be connected with multiple network equipment between main network side equipment occurs unsuccessfully, determines the channel quality of each Serving cell in subordinate cell set SCG;
If there is the Serving cell meeting channel quality conditions in described SCG, then a Serving cell selected by described subscriber equipment from the Serving cell meeting channel quality conditions;
Described subscriber equipment initiates radio resource control RRC connection reconstruction to the described Serving cell selected.
2. the method for claim 1, is characterized in that, a Serving cell selected by described subscriber equipment from the Serving cell meeting channel quality conditions, comprising:
The top-quality Serving cell of described subscriber equipment selective channel from the Serving cell meeting channel quality conditions.
3. the method for claim 1, is characterized in that, according to following manner, described subscriber equipment judges whether Serving cell meets channel quality conditions:
For a Serving cell, described subscriber equipment, when at least one parameter that the channel quality of described Serving cell comprises is in the setting range of correspondence, determines that described Serving cell meets channel quality conditions;
Wherein, what the channel quality of described Serving cell comprised in following parameters is part or all of:
Channel quality indicator (CQI), order instruction RI and pre-coding matrix instruction PMI.
4. the method for claim 1, is characterized in that, described subscriber equipment initiates RRC connection reconstruction to the described Serving cell selected, and comprising:
The media access control MAC entity of main plot group MCG and SCG resets by described subscriber equipment, hang up all MCG carry and all SCG carry;
Described subscriber equipment sends RRC connection reconstruction request message to the described Serving cell selected.
5. method as claimed in claim 4, it is characterized in that, described MCG carries Signaling Radio Bearer SRB1 and SRB2 comprised between main network side equipment, and and main network side equipment between Data Radio Bearer DRB;
Described SCG carries all DRB comprised between undernet side apparatus.
6. the method as described in as arbitrary in Claims 1 to 5, it is characterized in that, described subscriber equipment also comprises after determining the channel quality of each Serving cell in SCG:
If do not meet the Serving cell of channel quality conditions in described SCG, described subscriber equipment carries out cell selection procedure, and carries out RRC reconstruction to the community chosen.
7. recover a subscriber equipment for wireless link, it is characterized in that, described subscriber equipment is connected with multiple network equipment, and this subscriber equipment comprises:
Determination module, occurs unsuccessfully for the wireless link between main network side equipment, determines the channel quality of each Serving cell in subordinate cell set SCG;
Select module, if for there is the Serving cell meeting channel quality conditions in described SCG, then a Serving cell selected by described subscriber equipment from the Serving cell meeting channel quality conditions;
Rebuild module, for initiating radio resource control RRC connection reconstruction to the described Serving cell selected.
8. subscriber equipment as claimed in claim 7, is characterized in that, described selection module specifically for:
The top-quality Serving cell of selective channel from the Serving cell meeting channel quality conditions.
9. subscriber equipment as claimed in claim 7, is characterized in that, described selection module also for, judge whether Serving cell meets channel quality conditions according to following manner:
For a Serving cell, when at least one parameter that the channel quality of described Serving cell comprises is in the setting range of correspondence, determine that described Serving cell meets channel quality conditions;
Wherein, what the channel quality of described Serving cell comprised in following parameters is part or all of:
Channel quality indicator (CQI), order instruction RI and pre-coding matrix instruction PMI.
10. subscriber equipment as claimed in claim 7, is characterized in that, described reconstruction module specifically for:
The media access control MAC entity of main plot group MCG and SCG is resetted, hang up all MCG carry and all SCG carry; RRC connection reconstruction request message is sent to the described Serving cell selected.
11. subscriber equipmenies as claimed in claim 10, is characterized in that, described MCG carries Signaling Radio Bearer SRB1 and SRB2 comprised between main network side equipment, and and main network side equipment between Data Radio Bearer DRB;
Described SCG carries all DRB comprised between undernet side apparatus.
12. as arbitrary in claim 7 ~ 11 as described in subscriber equipment, it is characterized in that, described reconstruction module also for:
If do not meet the Serving cell of channel quality conditions in described SCG, carry out cell selection procedure, and carry out RRC reconstruction to the community chosen.
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| Publication number | Priority date | Publication date | Assignee | Title |
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