CN102395148B - Method for improving mobility robustness, system and equipment thereof - Google Patents
Method for improving mobility robustness, system and equipment thereof Download PDFInfo
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- CN102395148B CN102395148B CN2011103619166A CN201110361916A CN102395148B CN 102395148 B CN102395148 B CN 102395148B CN 2011103619166 A CN2011103619166 A CN 2011103619166A CN 201110361916 A CN201110361916 A CN 201110361916A CN 102395148 B CN102395148 B CN 102395148B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
An embodiment of the invention relates to the wireless communication technology field and especially relates to a method for improving mobility robustness, a system and equipment thereof. The invention aims at improving determination accuracy of the mobility robustness in a networking environment of a Macro base station and a Pico base station under a Hetnet scene. In the embodiment of the invention, first network side equipment sends a finally obtained wireless signal quality parameter value of a cell to second network side equipment containing the cell whose parameter is not set up correctly, wherein the value is obtained before user equipment generates failure connection. The second network side equipment determines the decision signal quality value of the corresponding cell according to the wireless signal quality parameter value of the cell and then determines a reason of generation of the failure connection according to the decision signal quality value of the cell. The multilayer coating condition is considered in the Hetnet scene, determination accuracy of the mobility robustness in the networking environment of the Macro base station and the Pico can be improved.
Description
Technical field
The present invention relates to wireless communication technology field, particularly a kind of method, system and equipment that improves mobile robustness.
Background technology
Reducing the complexity of operational administrative work, reduce operation maintenance cost, is an urgent demand of common carrier.In follow-on network, wish to reduce the artificial participation of the network planning and Operation and Maintenance by introducing the mechanism of self-organization of network, reduce construction and the operation cost of network.Just under such background, E-UTRA (Evolved Universal Terrestrial Radio Access, the terrestrial wireless access of evolution) SON (the Self Organizing Networks of system, self-organizing network) characteristic is studied as work subject under discussion of 3GPP (3rd Generation Partnership Project, 3G (Third Generation) Moblie standardization body).The SON technology comprised self-configuring, self-optimizing and certainly cured, and self-optimizing is a key property wherein.
The SON self-optimization function need to be monitored some networks and system performance parameter as input, as the statistics of network performance index, fault warning, notice etc., after to the input data analysis, optimized algorithm makes a policy, the last adjusting operation that automatically triggers relevant network node.
In the mobile network, handoff parameter arranges improper meeting and has a strong impact on systematic function, and the most serious situation is to cause conversation loss.Therefore the mobility parameters self-optimizing is one of E-UTRA system SON sixty-four dollar question to be solved, want to reduce the generation of handoff failure, reduce the conversation loss that improper switching causes, and reduce unnecessary switching, avoid the invalid use of these switchings to system resource.
MRO (Mobility Robustness Optimization, mobile robustness optimization) at first will do, and is the basic reason of decision problem exactly.
The criterion of judgement switching too early is as follows:
Connection failure occurs very soon in UE (subscriber equipment) after being switched to Target cell, and then UE rebuilds and connects in cell-of-origin.
The criterion that judgement is switched to wrong cell is as follows:
Connection failure (no matter being in cell-of-origin or at Target cell) occurs in UE very soon in handoff procedure or after having switched, then UE a third party community (neither cell-of-origin, also non-Target cell) rebuild and connect.
Along with the requirement of growing data rate and business load, traditional covers and provides the method for access can not satisfy the demands with the macro base station individual layer.Adopt layered coverage, can be good at addressing this is that at hot zones or some lower powered base stations of indoor deployment (Pico (low power base station)/Femto (Home eNodeB)/Relay (relaying)).
This lower powered base station is a kind of base station equipment be applied under family's indoor environment, working environment or the little overlay environment of other focus, can make operator that high data rate, attractive business more cheaply are provided more.In order to reduce the interference problem in layered coverage, introduced ABS (Almost BlankSubframe, the subframe of mourning in silence), this subframe is configured in interference base station one side, usually in the network environment of Macro (grand) base station and Pico base station, generally by the Macro base station, the ABS subframe is set, simultaneously, the Bias (side-play amount) between Macro and Pico is set.So just enlarged the coverage of Pico.
In the mobile robustness scheme of R10, only considered the method that common macro base station individual layer covers, do not consider the network environment of Macro base station and Pico base station under Hetnet (heterogeneous network, the i.e. scene of macro base station, low power base station, Home eNodeB mixed networking) scene.For example, according to the determination methods of current MRO, do not consider that Macro is the situation that Pico arranges ABS and Bias, may be mistaken for switching too early by being switched to the wrong cell problem like this.As shown in Figure 1, solid line is the original coverage of Pico, and dotted line is that Macro is the coverage after Pico1 and Pico2 have configured ABS and Bias.The UE configuration that but Macro for the Bias of Pico1 and Pico2 is is connected state by the RRC signaling, therefore be only applicable to the switching of connected state.Connection failure has occurred after Macro is switched to Pico1 for UE, and to carry out the community of RRC connection reconstruction be Macro to UE subsequently, according to existing mobile robustness mechanism, the problem cause diagnosis for switching too early.But in fact, this diagnosis is incorrect, because the basic reason of the problem that leads to the failure is the target selection mistake of switching, after switching, the signal of Pico1 community is enough not good, causes call drop.The Pico2 community should be selected in the Macro base station, rather than the Pico1 community is switched.
In sum, at present due in the mobile robustness scheme, only consider the method that common macro base station individual layer covers, made the judging nicety rate that carries out mobile robustness in the network environment of Macro and Pico under the Hetnet scene lower.
Summary of the invention
A kind of method, system and equipment that improves mobile robustness that the embodiment of the present invention provides, in order to carry out the judging nicety rate of mobile robustness in the network environment that improves Macro base station and Pico base station under the Hetnet scene.
A kind of method that improves mobile robustness that the embodiment of the present invention provides comprises:
The first network side apparatus determines that cell parameter arranges wrong community after the Indication message of subscriber equipment of connection failure occurs in receiving for community;
Described first network side apparatus sends the radio signal quality parameter value of described subscriber equipment last community obtained before connection failure occurs to the second network side apparatus under definite community.
The another kind that the embodiment of the present invention provides improves the method for mobile robustness, comprising:
The second network side apparatus receives the radio signal quality parameter value from the community of first network side apparatus, and wherein said radio signal quality parameter value is subscriber equipment last acquisition before connection failure occurs;
Described second network side apparatus, according to described district wireless signals mass parameter value, is determined the decision signal mass value of respective cell;
Described second network side apparatus, according to the decision signal mass value of community, is determined the reason that connection failure occurs;
The network equipment accessed when wherein, described first network side apparatus is subscriber equipment generation connection failure.
A kind of network equipment that improves mobile robustness that the embodiment of the present invention provides comprises:
The community determination module, after the Indication message receiving the subscriber equipment that connection failure occurs for community, determine that cell parameter arranges wrong community;
Sending module, send the radio signal quality parameter value of described subscriber equipment last community obtained before connection failure occurs for the second network side apparatus under the community to definite.
The another kind that the embodiment of the present invention provides improves the network equipment of mobile robustness, comprising:
Receiver module, for receiving the radio signal quality parameter value from the community of first network side apparatus, wherein said radio signal quality parameter value is subscriber equipment last acquisition before connection failure occurs;
The mass value determination module, for according to described district wireless signals mass parameter value, determine the decision signal mass value of respective cell;
Judging module, for the decision signal mass value according to community, determine the reason that connection failure occurs;
The network equipment accessed when wherein, described first network side apparatus is subscriber equipment generation connection failure.
A kind of system that improves mobile robustness that the embodiment of the present invention provides comprises:
The first network side apparatus, after the Indication message receiving the subscriber equipment that connection failure occurs for community, determine that cell parameter arranges wrong community, send the radio signal quality parameter value of described subscriber equipment last community obtained before connection failure occurs to the second network side apparatus under definite community;
The second network side apparatus, for receiving the radio signal quality parameter value from the community of first network side apparatus, according to described district wireless signals mass parameter value, determine the decision signal mass value of respective cell, according to the decision signal mass value of community, determine the reason that connection failure occurs.
Due to the situation of considering that in the Hetnet scene multilayer covers, improved the judging nicety rate that carries out mobile robustness in the network environment of Macro and Pico; Further improved the performance of MRO.
The accompanying drawing explanation
The schematic diagram that Fig. 1 is Hetnet scene in background technology;
Fig. 2 is the system configuration schematic diagram that the embodiment of the present invention improves mobile robustness;
Fig. 3 is the network equipment structural representation that the embodiment of the present invention sends the radio signal quality parameter value;
Fig. 4 is the network equipment structural representation that the embodiment of the present invention receives the radio signal quality parameter value;
Fig. 5 is the method flow schematic diagram that embodiment of the present invention first network side apparatus improves mobile robustness;
Fig. 6 is the method flow schematic diagram that embodiment of the present invention second network side apparatus improves mobile robustness;
Fig. 7 improves the method flow schematic diagram of mobile robustness in embodiment of the present invention scene one;
Fig. 8 improves the method flow schematic diagram of mobile robustness in embodiment of the present invention scene two;
The schematic diagram that Fig. 9 is embodiment of the present invention scene three.
Embodiment
For in background technology due in the mobile robustness scheme, only considered the method that common macro base station individual layer covers, make the lower problem of judging nicety rate of carrying out mobile robustness in the network environment of Macro and Pico under the Hetnet scene, embodiment of the present invention first network side apparatus arranges to cell parameter the radio signal quality parameter value that second network side apparatus under wrong community sends subscriber equipment last community obtained before connection failure occurs; The second network side apparatus, according to the radio signal quality parameter value of community, is determined the decision signal mass value of respective cell, and, according to the decision signal mass value of community, determines the reason that connection failure occurs.Due to the situation of considering that in the Hetnet scene multilayer covers, improved the judging nicety rate that carries out mobile robustness in the network environment of Macro and Pico.
Wherein, the radio signal quality parameter value of the embodiment of the present invention includes but not limited at least one in the following parameters value:
RSRP (Reference signal received power, Reference Signal Received Power) value, RSRQ (Reference Signal Received Quality, Reference Signal Received Quality) value.
In force, the connection failure of the embodiment of the present invention means the disconnection that is connected between the community of subscriber equipment and access, generally can also use RLF (Radio Link Failure, Radio Link Failure), HOF (HandOver Failure, handoff failure) etc. means that the title of this situation replaces the connection failure of the embodiment of the present invention.
Below in conjunction with Figure of description, the embodiment of the present invention is described in further detail.
As shown in Figure 2, the system of embodiment of the present invention raising mobile robustness comprises: first network side apparatus 10 and second network side apparatus 20.
First network side apparatus 10, after the Indication message receiving the subscriber equipment that connection failure occurs for community, determine that cell parameter arranges wrong community, the radio signal quality parameter value of the communities that the second network side apparatus 20 transmission subscriber equipmenies under definite community finally obtained before connection failure occurs;
Second network side apparatus 20, for receiving the radio signal quality parameter value from first network side apparatus 10 community, according to district wireless signals mass parameter value, determine the decision signal mass value of respective cell, according to the decision signal mass value of community, determine the reason that connection failure occurs.
In force, for the Indication message that the subscriber equipment of connection failure occurs in community, can be the Radio Link Failure Indication message.
Preferably, first network side apparatus 10 can be placed in interface signaling by the radio signal quality parameter value of subscriber equipment last community obtained before connection failure occurs, and this interface signaling is sent to second network side apparatus 20;
Accordingly, second network side apparatus 20, after receiving interface signaling message, extracts the radio signal quality parameter value of subscriber equipment last community obtained before connection failure occurs from interface signaling.
In force, the interface signaling of the embodiment of the present invention includes but not limited to a kind of in following message:
Handover report (Handover Report).
Due to subscriber equipment connection failure occurs after, in the information reported to network side except being included in, the connection failure radio signal quality parameter value of the last community obtained before occurs, first network side apparatus 10 also comprises the cell information that connection failure is relevant, so can send to the connection failure relevant information second network side apparatus 20.
A kind of preferably processing mode is: first network side apparatus 10 directly is transmitted to second network side apparatus 20 by these information.That is to say, first network side apparatus 10 sends to second network side apparatus 20 together by radio signal quality parameter value and the connection failure relevant information of subscriber equipment last community obtained before connection failure occurs.
Wherein, embodiment of the present invention connection failure relevant information includes but not limited at least one in following message:
The cell ID that when connection failure occurs, after the cell ID of Serving cell, connection failure, UE trial reconstruction connects, UE is in the sign of above-mentioned Serving cell.
The radio signal quality parameter value of the community that in force, second network side apparatus 20 receives may comprise the radio signal quality parameter value of a plurality of communities.
Owing to having carried out scope extension process ，You community and do not carry out the scope extension process in the You community, so need to carry out different disposal for different communities.Concrete:
Do not carry out the scope extension process for ，Ruo Gai community, Yi Ge community, the decision signal mass value that the radio signal quality parameter value of second network side apparatus Jiang Gai community is corresponding as this community;
Carry out the scope extension process for an adjacent cell ，Ruo Gai community, the second network side apparatus determines according to the side-play amount (Bias) of the radio signal quality parameter value He Gai community of this community the decision signal mass value that this community is corresponding.
The decision signal mass value that carries out scope extension process ，Zeng Gai community such as the ，Yi Ge community equals the side-play amount sum of the radio signal quality parameter value He Gai community of this community.
Wherein, side-play amount is the pre-configured cell signal power compensating value of network.
Second network side apparatus 20 after having determined the decision signal mass value of each community, just can be judged the reason that connection failure occurs, sees and meet which kind of reason.
Such as: subscriber equipment, from A is switched to B, according to the decision signal mass value of each community, determines that subscriber equipment should carry out the RRC reconstruction at C, meets the criterion that is switched to wrong cell, and the reason that can determine connection failure is to be switched to wrong cell.
Such as: subscriber equipment, from A is switched to B, according to the decision signal mass value of each community, determines that subscriber equipment should carry out the RRC reconstruction at A, meets the criterion of too early switching, and the reason that can determine connection failure is too early switching.
In force, if it is multiple that the radio signal quality parameter value has, the decision signal mass value just has multiplely, and at this moment preferably a kind of processing mode is: every kind of decision signal mass value is judged respectively, if judged result is consistent, determine that judged result is exactly the reason of connection failure; If judged result is inconsistent, abandon this result.
If, such as the radio signal quality parameter value has RSRP and RSRQ, RSRP is judged as separately and is switched to wrong cell, RSRQ is judged as separately and is switched to wrong cell, can determine that judged result is switched to wrong cell exactly; If RSRP is judged as separately and is switched to wrong cell, RSRQ is judged as separately to too early switching, abandon this result.
It should be noted that: embodiment of the present invention radio signal quality parameter value has when multiple and is not limited to above-mentioned processing mode, and other have when multiple the mode that can be judged all to be suitable for the embodiment of the present invention at the radio signal quality parameter value.
Wherein, the network equipment of the embodiment of the present invention can be base station (such as macro base station, Home eNodeB etc.), can be also RN (relaying) equipment, can also be other network equipment.
Based on same inventive concept, network equipment in the system that improves mobile robustness also is provided in the embodiment of the present invention, and has improved the method for mobile robustness, because the principle that these equipment are dealt with problems with method is similar to the system that improves mobile robustness, therefore the enforcement of these equipment and method can, referring to the enforcement of system, repeat part and repeat no more.
As shown in Figure 3, the network equipment of embodiment of the present invention transmission radio signal quality parameter value comprises: community determination module 300 and sending module 310.
Sending module 310, for the radio signal quality parameter value of the transmission of the second network side apparatus under the community definite to community determination module 300 subscriber equipment last community obtained before connection failure occurs.
Preferably, sending module 310 equipment send the radio signal quality parameter by interface signaling.
Preferably, sending module 310 sends to the second network side apparatus by the connection failure relevant information.
As shown in Figure 4, the network equipment of embodiment of the present invention reception radio signal quality parameter value comprises: receiver module 400, mass value determination module 410 and judging module 420.
Mass value determination module 410, for the district wireless signals mass parameter value according to receiver module 400, determine the decision signal mass value of respective cell;
Judging module 420, for the decision signal mass value of the community definite according to mass value determination module 410, determine the reason that connection failure occurs;
The network equipment accessed when wherein, the first network side apparatus is subscriber equipment generation connection failure.
Preferably, the interface signaling that comprises the radio signal quality parameter value that receiver module 400 receives from the first network side apparatus.
Preferably, for ，Ruo Gai community, Yi Ge community, do not carry out the scope extension process, the decision signal mass value that the radio signal quality parameter value of mass value determination module 410Jiang Gai community is corresponding as this community;
Preferably, for an adjacent cell ，Ruo Gai community, carry out the scope extension process, mass value determination module 410 determines according to the side-play amount of the radio signal quality parameter value He Gai community of this community the decision signal mass value that this community is corresponding.
In force, also may become according to the network equipment of different application scenarios transmission radio signal quality parameter values the network equipment that receives the radio signal quality parameter value; Accordingly, the network equipment that receives the radio signal quality parameter value also may become the network equipment that sends the radio signal quality parameter value, so preferably, module in module in Fig. 4 in the network equipment of transmission radio signal quality parameter value and Fig. 5 in the network equipment of reception radio signal quality parameter value can also be combined in a network equipment, and selects as required corresponding module work.
As shown in Figure 5, the method for embodiment of the present invention first network side apparatus raising mobile robustness comprises the following steps:
Step 501, first network side apparatus determine that cell parameter arranges wrong community after the Indication message of subscriber equipment of connection failure occurs in receiving for community;
Step 502, first network side apparatus send the radio signal quality parameter value of subscriber equipment last community obtained before connection failure occurs to the second network side apparatus under definite community.
Preferably, in step 502, the first network side apparatus can be placed in interface signaling by the radio signal quality parameter value of subscriber equipment last community obtained before connection failure occurs, and this interface signaling message is sent to the second network side apparatus.
Preferably, in step 502, the first network side apparatus can send to the connection failure relevant information second network side apparatus.
Such as: the first network side apparatus sends to the second network side apparatus together by radio signal quality parameter value and the connection failure relevant information of subscriber equipment last community obtained before connection failure occurs.
As shown in Figure 6, the method for embodiment of the present invention second network side apparatus raising mobile robustness comprises the following steps:
Step 601, second network side apparatus receive the radio signal quality parameter value from the community of first network side apparatus, wherein the radio signal quality parameter value is subscriber equipment last acquisition before connection failure occurs, the network equipment that the first network side apparatus accesses while being subscriber equipment generation connection failure;
Preferably, in step 601, the second network side apparatus receives the interface signaling that comprises the radio signal quality parameter value from the first network side apparatus.
Preferably, in step 602, for ，Ruo Gai community, Yi Ge community, do not carry out the scope extension process, the decision signal mass value that the radio signal quality parameter value of second network side apparatus Jiang Gai community is corresponding as this community.
Preferably, in step 602, for an adjacent cell ，Ruo Gai community, carry out the scope extension process, the second network side apparatus determines according to the side-play amount of the radio signal quality parameter value He Gai community of this community the decision signal mass value that this community is corresponding.
In step 603, the second network side apparatus after having determined the decision signal mass value of each community, just can be judged the reason that connection failure occurs, sees and meet which kind of reason.
Such as: subscriber equipment, from A is switched to B, according to the decision signal mass value of each community, determines that subscriber equipment should carry out the RRC reconstruction at C, meets the criterion that is switched to wrong cell, and the reason that can determine connection failure is to be switched to wrong cell.
Such as: subscriber equipment, from A is switched to B, according to the decision signal mass value of each community, determines that subscriber equipment should carry out the RRC reconstruction at A, meets the criterion of too early switching, and the reason that can determine connection failure is too early switching.
Wherein, Fig. 5 and Fig. 6 can synthesize a flow process, form a method that improves mobile robustness, first perform step 501 and step 502, then perform step 601～step 603.
In force, first network side apparatus and second network side apparatus can be the network equipments of same type, such as can be all Macro; Can be also dissimilar network equipment, such as one be that mono-of Macro is Pico.
Below with several concrete scenes, the solution of the present invention is elaborated, to be the RSRP value describe as example the district wireless signals mass parameter value of wherein take in scene below, district wireless signals mass parameter value is that situation and the district wireless signals mass parameter value of other value is that the RSRP value is similar, does not repeat them here.
Scene one: Pico 1 and Pico 2 are two low power base station under the Macro coverage.Process the Bias that Macro A (Cell of Macro base station) is provided with 8db for the Cell 1 under Pico 1 and the Cell 2 under Pico 2 for Pico being carried out to Range Extension (scope expansion).
As shown in Figure 7, in embodiment of the present invention scene one, improve in the method schematic diagram of mobile robustness:
UE is switched to Pico 1 Xia community Cell 1 from Macro A Xia community Cell A;
Switched rear UE, in the Cell 1 of Pico 1, connection failure has occurred;
The RSRP of the Macro A that UE measures after connection failure is-105dbm that the RSRP of CELL 1 is-114dbm that the RSRP of CELL 2 is-109dbm;
UE carries out the RRC connection reconstruction in Macro A, rebuilds successfully rear UE connection failure Report is reported and rebuilds base station, place, community (being Macro A);
Macro A after determining and being not covering problem, sends Radio Link Failure indication (RLF Indication) message according to connection failure Report to the base station (being Pico1) that connection failure occurs;
After Pico 1 receives the Radio Link Failure Indication message, determine unsuccessfully relevant with switching, and definite handover source community identical with the reconstruction community after, the reason of connection failure is judged;
The RSRP of each adjacent cell that Pico 1 measures after connection failure according to UE, the reason that connection failure occurs in judgement is ' switching is too early ', and determines that according to the result of judgement cell parameter arranges wrong community;
The base station (being Macro A) that Pico 1 arranges under wrong community to cell parameter sends HOReport message, carries UE simultaneously in message the last RSRP information obtained before connection failure occurs;
Macro A is the Bias that Pico 1 and Pico 2 arrange according to the RSRP received and Macro A, carries out the too early judgement with being switched to wrong cell of definite switching, concrete:
Although the signal quality of Cell A is best, UE is rebuild at Cell A, it is ABS and the Bias information that Pico arranges that but UE does not consider Macro A when carrying out the community selection, and MacroA is after obtaining RSRP, can consider the Bias of Pico when being judged, the Cell 1 that is Pico 1 is RSRP+Bias=-106dBm, and the Cell 2 of Pico 2 is RSRP+Bias=-101dBm, and Cell A is RSRP=-105dbm.
Due to Cell 2 be-101dBm higher than Cell A-105dBm, therefore, from the angle of Macro A, in fact UE should be chosen in Cell 2 and carries out the RRC connection reconstruction.Therefore, actual should be UE generation connection failure from Macro A is switched to Cell 1, should select subsequently Cell 2 to carry out the RRC connection reconstruction, and be switched to B from A, occur to meet in the process of selecting C the criterion that is switched to wrong cell after connection failure, so the result of Macro A judgement is once to be switched to wrong cell.
Scene two: Pico 1 and Pico 2 are two low power base station under Macro A coverage.For Pico is carried out to Range Extension, Macro A is the Bias that Cell 1 under Pico 1 and the Cell 2 under Pico 2 are provided with 8db.
As shown in Figure 8, in embodiment of the present invention scene two, the method for raising mobile robustness comprises:
UE is switched to Pico 1 Xia community Cell 1 from Macro A Xia community Cell A;
Switched rear UE, in the Cell 1 of Pico 1, connection failure has occurred;
The RSRP of the CELL A that UE measures after connection failure is-105dbm that the RSRP of CELL 1 is-114dbm that the RSRP of CELL 2 is-109dbm;
UE carries out RRC connection reconstruction, reconstruction failure in Cell A;
Macro A sends the Radio Link Failure Indication message to Pico 1;
After Pico 1 receives this message, judgement has second Radio Link Failure Indication message, abandons this message;
UE initiates RRC at another community Cell B with the Idle state and connects foundation, and after connection is successfully established, UE reports connection failure Report the base station B at Cell B place;
Base station B after determining and being not covering problem, sends Radio Link Failure Indication message to the base station (being Pico1) that connection failure occurs according to connection failure Report;
The RSRP of each adjacent cell that Pico 1 measures after connection failure according to UE, the reason that connection failure occurs in judgement is ' switching is too early ', and determines that according to the result of judgement cell parameter arranges wrong community;
The base station (being Macro A) that Pico 1 arranges under wrong community to cell parameter sends HOReport message, carries UE simultaneously in message the last RSRP information obtained before connection failure occurs;
Macro A is the Bias that Pico 1 and Pico 2 arrange according to the RSRP received and Macro A, carries out the too early judgement with being switched to wrong cell of definite switching, concrete:
Although the signal quality of Cell A is best, UE is rebuild at cell A, it is ABS and the Bias information that Pico arranges that but UE does not consider Macro A when carrying out the community selection, and MacroA is after obtaining RSRP, can consider the Bias of Pico when being judged, the Cell 1 that is Pico 1 is RSRP+Bias=-106dBm, and the Cell 2 of Pico2 is RSRP+Bias=-101dBm, and Cell A is RSRP=-105dbm.
Due to Cell 2 be-101dBm higher than Cell A-105dBm, therefore, from the angle of Macro A, in fact UE should be chosen in Cell 2 and carries out the RRC connection reconstruction.Therefore, this problem is actual should be UE generation connection failure from Macro A is switched to Cell 1, should select subsequently Cell 2 to carry out the RRC connection reconstruction, and be switched to B from A, occur to meet in the process of selecting C the criterion that is switched to wrong cell after connection failure, so the result of Macro A judgement is once to be switched to wrong cell.
Scene three: Pico1 is positioned at the boundary of Macro A, Macro B and Macro C.CellA, Cell B and Cell C are respectively Xia communities, three Macro base stations, and Cell 1 is Pico1 Xia community.For Cell1 is carried out to Range Extension, Macro A, Macro B and Macro C are the Bias that Cell 1 is provided with 8db.
As shown in Figure 9, in the schematic diagram of embodiment of the present invention scene three, solid line is the original coverage of Cell 1, and dotted line is to be provided with the coverage after Bias for Cell 1.
UE is switched to Macro B Xia community Cell B from Macro A Xia community Cell A, after having switched, connection failure has occurred;
The RSRP that UE measures Cell A after connection failure is-105dbm that the RSRP of Cell B is-114dbm that the RSRP of Cell 1 is-109dbm;
UE carries out the RRC connection reconstruction at Cell A, connection failure Report is reported and rebuilds base station, place, community (being Macro A) after rebuilding successfully;
Macro A, after determining and being not covering problem, sends connection failure Indication message to the base station (being Macro B) that connection failure occurs;
After Macro B receives connection failure Indication message, determine unsuccessfully relevant with switching, and definite handover source community identical with the reconstruction community after, the reason of connection failure is judged;
The RSRP of each adjacent cell that Macro B measures after connection failure according to UE, the reason that connection failure occurs in judgement is ' switching too early ', and determine that according to the result of judgement cell parameter arranges wrong community (because Macro B can't know the value that Macro A is the Bias that arranges of Pico 1, so Macro B is not consider Bias in judgement);
The base station (being Macro A) that Macro B arranges under wrong community to cell parameter sends HOReport message, carries UE simultaneously in message the last RSRP information obtained before connection failure occurs;
Macro A is the Bias that Pico 1 arranges according to the RSRP received and Macro A, carries out the too early judgement with being switched to wrong cell of definite switching, concrete:
Although the signal quality of Cell A is best, UE is rebuild at Cell A, it is ABS and the Bias information that Pico 1 arranges that but UE does not consider Macro A when carrying out the community selection, and MacroA is after obtaining RSRP, can consider the Bias of Pico 1 when being judged, the Cell 1 that is Pico 1 is RSRP+Bias=-101dBm, and the Cell A of Macro A is RSRP=-105dbm, and the CellB of Macro B is RSRP=-114dbm.
Due to CELL 1 be-101dBm higher than CELL A-105dBm, therefore, from the angle of Macro A, in fact UE should be chosen in Cell 1 and carries out the RRC connection reconstruction.Therefore, this problem is actual, and should be UE, from the Cell A of Macro A is switched to the Cell B of Macro B, connection failure occurs, should select subsequently Cell 1 to carry out the RRC connection reconstruction, and be switched to B from A, occur to meet in the process of selecting C the criterion that is switched to wrong cell after connection failure, so the result of Macro A judgement is once to be switched to wrong cell.
Scene four, Pico1 are positioned at the boundary of Macro A, Macro B and Macro C.CellA, Cell B and Cell C are respectively Xia communities, three Macro base stations, and Cell 1 is Pico1 Xia community.For Cell1 is carried out to Range Extension, Macro A, Macro B and Macro C are the Bias that Cell 1 is provided with 8db.
As shown in Figure 9, in the schematic diagram of embodiment of the present invention scene three, solid line is the original coverage of Cell 1, and dotted line is to be provided with the coverage after Bias for Cell 1.
UE is switched to Macro B Xia community Cell B from Macro A Xia community Cell A, after having switched, connection failure has occurred;
The RSRP that UE measures Cell A after connection failure is-105dbm that the RSRP of Cell B is-114dbm that the RSRP of Cell 1 is-109dbm;
UE carries out RRC connection reconstruction, reconstruction failure at Cell A;
Macro A sends the Radio Link Failure Indication message to Macro B;
After Macro B receives this message, judgement has the second Indication message, abandons this message;
UE initiates RRC at another community Cell C with the Idle state and connects foundation, and after connection is successfully established, UE reports connection failure Report the base station Macro C at Cell C place;
Macro C after determining and being not covering problem, sends Radio Link Failure Indication message to the base station (being Macro B) that connection failure occurs according to connection failure Report;
After Macro B receives the Radio Link Failure Indication message, determine unsuccessfully relevant with switching, and definite handover source community identical with the reconstruction community after, the reason of connection failure is judged;
The RSRP of each adjacent cell that Macro B measures after connection failure according to UE, the reason that connection failure occurs in judgement is ' switching is too early ', and determines that according to the result of judgement cell parameter arranges wrong community;
The base station (being Macro A) that Macro B arranges under wrong community to cell parameter sends HO Report message, carries UE simultaneously in message the last RSRP information obtained before connection failure occurs;
Macro A is the Bias that Pico 1 arranges according to the RSRP received and Macro A, carries out the too early judgement with being switched to wrong cell of definite switching, concrete:
Although the signal quality of Cell A is best, UE is rebuild at Cell A, it is ABS and the Bias information that Pico 1 arranges that but UE does not consider Macro A when carrying out the community selection, and Macro A is after obtaining RSRP, can consider the Bias of Pico 1 when being judged, the Cell 1 that is Pico 1 is RSRP+Bias=-101dBm, and the Cell A of Macro A is RSRP=-105dbm, and the CellB of Macro B is RSRP=-114dbm.
Due to CELL 1 be-101dBm higher than CELL A-105dBm, therefore, from the angle of Macro A, in fact UE should be chosen in Cell 1 and carries out the RRC connection reconstruction.Therefore, this problem is actual, and should be UE, from the Cell A of Macro A is switched to the Cell B of Macro B, connection failure occurs, should select subsequently Cell 1 to carry out the RRC connection reconstruction, and be switched to B from A, occur to meet in the process of selecting C the criterion that is switched to wrong cell after connection failure, so the result of Macro A judgement is once to be switched to wrong cell.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, implement software example or in conjunction with the form of the embodiment of software and hardware aspect fully.And the present invention can adopt the form that wherein includes the upper computer program of implementing of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code one or more.
The present invention describes with reference to flow chart and/or the block diagram of method, equipment (system) and computer program according to the embodiment of the present invention.Should understand can be in computer program instructions realization flow figure and/or block diagram each flow process and/or the flow process in square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce for realizing the device in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction be stored in this computer-readable memory produce the manufacture that comprises command device, this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make and carry out the sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out on computer or other programmable devices is provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (14)
1. a method that improves mobile robustness, is characterized in that, the method comprises:
The first network side apparatus determines that cell parameter arranges wrong community after the Indication message of subscriber equipment of connection failure occurs in receiving for community;
Described first network side apparatus sends the radio signal quality parameter value of described subscriber equipment last community obtained before connection failure occurs to the second network side apparatus under definite community, so that described second network side apparatus is not while carrying out the scope extension process in described community, the decision signal mass value corresponding as described community using the radio signal quality parameter value of described community, or, when the scope extension process has been carried out in described community, determine according to the radio signal quality parameter value of described community and the side-play amount of described community the decision signal mass value that described community is corresponding.
2. the method for claim 1, is characterized in that, described first network side apparatus sends the radio signal quality parameter value and comprises:
Described first network side apparatus sends the radio signal quality parameter value by interface signaling.
3. the method for claim 1, is characterized in that, described district wireless signals mass parameter value comprises Reference Signal Received Quality RSRQ value and/or Reference Signal Received Power RSRP value.
4. described method as arbitrary as claim 1～3, is characterized in that, described first network side apparatus also comprises:
Described first network side apparatus sends to the second network side apparatus by the connection failure relevant information.
5. a method that improves mobile robustness, is characterized in that, the method comprises:
The second network side apparatus receives the radio signal quality parameter value from the community of first network side apparatus, and wherein said radio signal quality parameter value is subscriber equipment last acquisition before connection failure occurs;
Described second network side apparatus, according to described district wireless signals mass parameter value, is determined the decision signal mass value of respective cell;
Described second network side apparatus, according to the decision signal mass value of community, is determined the reason that connection failure occurs;
The network equipment accessed when wherein, described first network side apparatus is subscriber equipment generation connection failure;
Described second network side apparatus determines that the decision signal mass value comprises:
Do not carry out the scope extension process for ，Ruo Gai community, Yi Ge community, the radio signal quality parameter value decision signal mass value corresponding as this community of described second network side apparatus Jiang Gai community;
Carry out the scope extension process for an adjacent cell ，Ruo Gai community, described second network side apparatus determines according to the side-play amount of the radio signal quality parameter value He Gai community of this community the decision signal mass value that this community is corresponding.
6. method as claimed in claim 5, is characterized in that, described second network side apparatus receives the radio signal quality parameter value and comprises:
Described second network side apparatus receives the interface signaling that comprises the radio signal quality parameter value from described first network side apparatus.
7. method as described as claim 5 or 6, is characterized in that, described district wireless signals mass parameter value comprises RSRQ value and/or RSRP value.
8. a network equipment that improves mobile robustness, is characterized in that, this network equipment comprises:
The community determination module, after the Indication message receiving the subscriber equipment that connection failure occurs for community, determine that cell parameter arranges wrong community;
Sending module, send the radio signal quality parameter value of described subscriber equipment last community obtained before connection failure occurs for the second network side apparatus under the community to definite;
Receiver module, for receiving the radio signal quality parameter value from the community of first network side apparatus, wherein said radio signal quality parameter value is subscriber equipment last acquisition before connection failure occurs;
The mass value determination module, for according to described district wireless signals mass parameter value, determine the decision signal mass value of respective cell;
Judging module, for the decision signal mass value according to community, determine the reason that connection failure occurs;
The network equipment accessed when wherein, described first network side apparatus is subscriber equipment generation connection failure;
Described mass value determination module is specifically for the radio signal quality parameter value decision signal mass value corresponding as this community that do not carry out scope extension process ，Jiang Gai community for ，Ruo Gai community, Yi Ge community; Carry out the scope extension process for an adjacent cell ，Ruo Gai community, according to the side-play amount of the radio signal quality parameter value He Gai community of this community, determine the decision signal mass value that this community is corresponding.
9. network equipment as claimed in claim 8, is characterized in that, described sending module specifically for:
Equipment sends the radio signal quality parameter value by interface signaling.
10. network equipment as claimed in claim 8 or 9, is characterized in that, described sending module also for:
The connection failure relevant information is sent to the second network side apparatus.
11. network equipment, is characterized in that as claimed in claim 8 or 9, described receiver module specifically for:
Reception is from the interface signaling that comprises the radio signal quality parameter value of described first network side apparatus.
12. a network equipment that improves mobile robustness, is characterized in that, this network equipment comprises:
Receiver module, for receiving the radio signal quality parameter value from the community of first network side apparatus, wherein said radio signal quality parameter value is subscriber equipment last acquisition before connection failure occurs;
The mass value determination module, for according to described district wireless signals mass parameter value, determine the decision signal mass value of respective cell;
Judging module, for the decision signal mass value according to community, determine the reason that connection failure occurs;
The network equipment accessed when wherein, described first network side apparatus is subscriber equipment generation connection failure;
Described mass value determination module is specifically for the radio signal quality parameter value decision signal mass value corresponding as this community that do not carry out scope extension process ，Jiang Gai community for ，Ruo Gai community, Yi Ge community; Carry out the scope extension process for an adjacent cell ，Ruo Gai community, according to the side-play amount of the radio signal quality parameter value He Gai community of this community, determine the decision signal mass value that this community is corresponding.
13. network equipment as claimed in claim 12, is characterized in that, described receiver module specifically for:
Reception is from the interface signaling that comprises the radio signal quality parameter value of described first network side apparatus.
14. a system that improves mobile robustness, is characterized in that, this system comprises:
The first network side apparatus, after the Indication message receiving the subscriber equipment that connection failure occurs for community, determine that cell parameter arranges wrong community, send the radio signal quality parameter value of described subscriber equipment last community obtained before connection failure occurs to the second network side apparatus under definite community;
The second network side apparatus, for receiving the radio signal quality parameter value from the community of first network side apparatus, according to described district wireless signals mass parameter value, determine the decision signal mass value of respective cell, according to the decision signal mass value of community, determine the reason that connection failure occurs;
Described second network side apparatus is specifically for determining the decision signal mass value according to following steps: for the Yi Ge community, the scope extension process is not carried out in the Ruo Gai community, the radio signal quality parameter value decision signal mass value corresponding as this community of described second network side apparatus Jiang Gai community; Carry out the scope extension process for an adjacent cell ，Ruo Gai community, described second network side apparatus determines according to the side-play amount of the radio signal quality parameter value He Gai community of this community the decision signal mass value that this community is corresponding.
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| CN2011103619166A CN102395148B (en) | 2011-11-15 | 2011-11-15 | Method for improving mobility robustness, system and equipment thereof |
| PCT/CN2012/080733 WO2013071787A1 (en) | 2011-11-15 | 2012-08-29 | Method, system and device for improving mobility robustness |
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| CN2011103619166A CN102395148B (en) | 2011-11-15 | 2011-11-15 | Method for improving mobility robustness, system and equipment thereof |
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| CN102395148B (en) * | 2011-11-15 | 2013-12-11 | 电信科学技术研究院 | Method for improving mobility robustness, system and equipment thereof |
| EP2840826B1 (en) | 2012-05-11 | 2016-07-13 | Huawei Technologies Co., Ltd. | Method, device and system for configuring cell range expansion bias |
| CN104349361B (en) * | 2013-08-06 | 2019-05-17 | 上海诺基亚贝尔股份有限公司 | Method and device for wireless heterogeneous networks connection |
| CN111246499B (en) * | 2018-11-29 | 2022-05-24 | 华为技术有限公司 | Method and device for transmitting information |
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| CN102395148A (en) | 2012-03-28 |
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