CN101873566B - Mobility management method and system of user terminal along given line - Google Patents
Mobility management method and system of user terminal along given line Download PDFInfo
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- CN101873566B CN101873566B CN200910083021.3A CN200910083021A CN101873566B CN 101873566 B CN101873566 B CN 101873566B CN 200910083021 A CN200910083021 A CN 200910083021A CN 101873566 B CN101873566 B CN 101873566B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/34—Reselection control
- H04W36/38—Reselection control by fixed network equipment
- H04W36/385—Reselection control by fixed network equipment of the core network
Abstract
The invention discloses a mobility management method and a system of a user terminal along a given line. The invention reduces unnecessary measurement, avoids the disordered reselection or switching of a side cell and improves the efficiency of UE mobility management by setting a proper adjacent cells list and decides the reselected or switched target cell according to the UE movement direction and improves the accuracy of the UE mobility management. At the same time, the invention separates a private network covered by the given line from a common public network, enlarges the coverage range of each private network cell by adopting RRU and the RRU cell merging technology of different types and makes the cell coverage thereof accord with the linear shape of scenes along the given line in order to reduce the times of the cell reselection and switching.
Description
Technical field
The present invention relates to moving communicating field, especially relate to 3G (Third Generation) Moblie technology in the method and system of given line (as high-speed railway, highway) mobile management along the line, described mobile management comprises the method and system that switch cell reselection and community.
Background technology
The development pole the earth of personal mobile communication has enriched people's life, make people can be in any place, any time, incoming communication network easily under any condition, enjoy the Communications service of voice or data.And what in the behind of realizing this goal, rely on is wireless " all standing " and the mobility management mechanism of mobile communications network.Take 3-G (Generation Three mobile communication system) as example, and its Radio Access Network covers full wafer ground land system (PLMN) by a plurality of honeycomb shape community and forms.The radio signal that wherein on each You Gai community, community, base-station node (NodeB) is launched covers, and the user terminal in several communities (UE) and NodeB are controlled and managed by a radio network controller (RNC).When UE moves between different districts, its residing geography information is known by RNC, and RNC is according to the information of UE in the information of its known administration community and community, by allocation of radio resources to NodeB and each UE, NodeB and each UE utilize these Radio Resources to set up wireless channel, and on this wireless channel, receive/send data.
For mobile management, further understand and be: when UE Cong Yige community moves to another community, cause cell reselection (or switching), in prior art, S criterion and H criterion are followed in the realization of cell reselection: first UE carries out the judgement of S criterion to the received signal quality of community, to meeting the community of S criterion, according to H criterion, carry out cell quality sequence, if the Bu Shi current service cell, optimum subdistrict ranking the first, UE will leave current area and transfer resident this optimum subdistrict of arriving.The realization of switching is that UE constantly measures the received signal quality of (current) Serving cell and neighbor cell, when finding that the signal quality of certain community meets predefined trigger condition, (trigger condition is pre-established by RNC, and being handed down to UE) UE will send a measurement report to RNC, then RNC adjudicates switching according to the measurement report of receiving, UE carries out.
According to prior art, under high-speed railway environment, set up wireless coverage network and the UE of high-speed mobile is carried out to mobile management and exist larger obstacle: the first, traditional wireless coverage community is to be cellular hexagon, and high-speed railway shape is linear, in geometry, exist larger difference between the two.It two is, when realizing cell reselection or switching, UE initiate to measure, to signal averaging, judgement, carry out these flow processs, from completing these requirementss of process experience regular hour, for not having problems thus under general case, and when UE is in high-speed motion state, during this period of time, its wireless environment often has a very large change, this will have influence on greatly to the accuracy of UE mobile management and validity, and cause call completing rate to reduce, the problems such as cutting off rate raising and unordered gravity treatment (switching), ping-pong.This is just as " relay " race, when sportsman tends to hand over smoothly/to take over the baton in running at a high speed.Therefore have the necessity to existing network covers and mobile management is revised and optimized.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method and system in given line wireless coverage along the line and UE mobile management (comprising gravity treatment and switching).For solving, when given line (as high-speed railway, highway) adopts conventional wireless coverage cell along the line, coverage is little, the wasting of resources is large, and at user terminal during in high-speed motion state, mobile management difficulty, call completing rate is low, cutting off rate is high, user terminal easily produces the technical problems such as unordered gravity treatment and ping-pong.
For achieving the above object, technical scheme of the present invention is achieved in that
A motion management method for user terminal along given line,
While carrying out cell reselection, user terminal UE calculates the community grade point of neighbor cell and current service cell, and carries out gravity treatment according to community grade point, and the preferential gravity treatment of UE is to the neighbor cell in the UE direction of motion;
While carrying out community switching, UE reports the measurement report of the received signal quality of neighbor cell to radio network controller (RNC), and RNC is preferentially switched to the neighbor cell in the UE direction of motion according to the direction of motion of UE.
Based on technique scheme, further, given line wireless coverage along the line is adopted to the coverage mode of private network network and public network network detach;
In private network network, RNC is the neighbor cell of current private network community by given line former and later two private network cell configuration that are connected with current private network community along the line; In public network network, the neighbor cell that RNC is current public network cell by all geographically cell configuration adjacent with current public network cell; Private network network's coverage area is along given line chain region along the line.
Further, the chain that adopts Remote Radio Technique and dissimilar remote radio unit (RRU) combination technique to realize described private network community in private network network covers;
Described Remote Radio Technique refers to large capacity baseband processing unit in base station to concentrate and be placed in central machine room, adopts optical fiber to connect the radio-frequency module in base station is zoomed out to given line along both side;
Described dissimilar remote radio unit (RRU) combination technique refers to that the mode by Base-Band Processing is included into a logic district by a plurality of types several far-end RF module institute overlay areas different but that be connected geographically, makes the logic district after merging cover one section of given line area along the line.
Further, a kind of method of UE execution cell reselection of the present invention is:
A1, UE constantly measure the received signal quality of current service cell, and when UE finds that the received signal quality of current service cell is less than setting thresholding, UE measures neighbor cell received signal quality;
The direction of motion of A2, UE judgement self, gets rid of the community of the contrary direction of motion outside the scope of the Target cell of gravity treatment, only to the neighbor cell calculation plot grade in current service cell and the UE direction of motion;
The community grade point of current service cell is: current service cell received signal quality value Qmeas, s deducts current service cell reselection hysteresis parameter Qhcs
s;
The community grade point of neighbor cell is: this neighbor cell received signal quality value Qmeas, n deducts the reselection hysteresis parameter Qhcs of neighbor cell
n, when this neighbor cell and current service cell are not same level, also need to deduct the offset parameter TO of different layers inter-stage community
n;
A3, UE gravity treatment are arrived at setting-up time T
reselcetinteriorly can remain that community grade point is for the highest neighbor cell.
Further, the another kind of method of UE execution cell reselection of the present invention is:
B1, UE constantly measure the received signal quality of current service cell, and when UE finds that the received signal quality of current service cell is less than setting thresholding, UE measures neighbor cell received signal quality;
The direction of motion of B2, RNC judgement UE, and the direction of motion is informed to UE, UE calculates the community grade of current service cell and neighbor cell in the following way:
The community grade point of current service cell is: current service cell received signal quality value Qmeas, s deducts current service cell reselection hysteresis parameter Qhcs
s;
The community grade point of the neighbor cell in the UE direction of motion is: this neighbor cell received signal quality value Qmeas, n adds the reselection hysteresis parameter Qhcs of neighbor cell
n, when this neighbor cell and current service cell are not same level, also need to deduct the offset parameter TO of different layers inter-stage community
n;
The community grade point of the neighbor cell of the contrary UE direction of motion is: this neighbor cell received signal quality value Qmeas, n deducts the reselection hysteresis parameter Qhcs of neighbor cell
n, when neighbor cell and current service cell are not same level, also need to deduct the offset parameter TO of different layers inter-stage community
n;
B3, UE gravity treatment are to remaining that in setting-up time community grade point is for the highest neighbor cell.
UE of the present invention carries out a kind of method of switching community:
The direction of motion of C1, UE judgement self, as UE, by measurement, to find that the received signal quality of current service cell and/or neighbor cell meets predefined while reporting trigger condition, only reports the received signal quality of the neighbor cell in current service cell and the direction of motion to RNC;
Whether the measurement report of the community received signal quality that C2, RNC report according to UE is adjudicated UE and is switched, and if judgement switch, adjudicate UE simultaneously and be switched to which neighbor cell; Or,
UE of the present invention carries out the another kind of method of switching community:
D1, as UE, by measurement, to find that the received signal quality of current service cell and/or neighbor cell meets predefined while reporting trigger condition, reports the received signal quality of current service cell and all neighbor cells to RNC;
The direction of motion of D2, RNC judgement UE is also got rid of contrary direction of motion neighbor cell outside the selection community of switching, whether RNC adjudicates UE according to the signal quality of remaining neighbor cell and current service cell and switches, if judgement is switched, adjudicate UE simultaneously and be switched to which neighbor cell.
The system that another object of the present invention is to provide a kind of mobile management of user terminal along given line, for realizing this object, the present invention adopts following technical scheme:
A system for the mobile management of user terminal along given line, comprising:
UE direction of motion judge module, for the direction of motion that judges that UE is current;
Cell reselection module, for carrying out the preferential cell reselection in neighbor cell in the UE direction of motion according to the UE direction of motion of the community grade point of neighbor cell and current service cell and the output of UE direction of motion judge module;
Community handover module, switch the preferential community, neighbor cell of carrying out in the UE direction of motion for the measurement report of received signal quality and the UE direction of motion of UE direction of motion judge module output of the neighbor cell that reports according to UE.
Further, a kind of implementation of cell reselection module of the present invention comprises:
The first cell measurement module, while being less than setting thresholding for the received signal quality when UE discovery current service cell, measures neighbor cell received signal quality;
Module is got rid of in contrary direction of motion community, for the neighbor cell of the contrary UE direction of motion being got rid of outside the scope of the Target cell of gravity treatment according to the UE direction of motion of UE direction of motion judge module output;
The first community rating calculation module, for calculating the community grade of getting rid of the re-aiming community behind the contrary neighbor cell of the UE direction of motion;
The first gravity treatment module, for gravity treatment to remaining that in setting-up time community grade point is for the highest neighbor cell.
Further, the another kind of implementation of cell reselection module of the present invention comprises:
The second cell measurement module, while being less than setting thresholding for the received signal quality when UE discovery current service cell, measures neighbor cell received signal quality;
Community grade corrected Calculation module, for calculating the community grade of current service cell and neighbor cell and according to the UE direction of motion of UE direction of motion judge module output, the grade of neighbor cell being conducive to preferential gravity treatment to the correction of the neighbor cell in the UE direction of motion;
The second gravity treatment module, for the result gravity treatment of calculating according to community grade corrected Calculation module to remaining that in setting-up time community grade point is the highest neighbor cell.
A kind of implementation of community of the present invention handover module comprises:
The first measurement report reporting module, for finding by measurement that as UE the received signal quality of current service cell and/or neighbor cell meets the predefined received signal quality of the neighbor cell in current service cell and the UE direction of motion that reports while reporting trigger condition to the first handover module;
Whether the first handover module, adjudicate UE for the measurement report of the community received signal quality that reports according to UE and switch, and if judgement switch, adjudicate UE simultaneously and be switched to which neighbor cell; Or,
The another kind of implementation of community of the present invention handover module comprises:
The second measurement report reporting module, for predefinedly reporting the received signal quality of current service cell and all neighbor cells to RNC while reporting trigger condition when UE finds by measurement that the received signal quality of current service cell and/or neighbor cell meets;
The second handover module, for contrary direction of motion neighbor cell being got rid of outside the selection community of switching according to the UE direction of motion of UE direction of motion judge module judgement, whether according to the signal quality of remaining neighbor cell and current service cell, adjudicate UE switches, if judgement is switched, adjudicate UE simultaneously and be switched to which neighbor cell.
Further, described UE direction of motion judge module is positioned at UE end or RNC end;
The private network network that the present invention covers line of high-speed railway is separated with common public network, and private network covers the coverage Bing Shiqi community that adopts remote radio and dissimilar RRU community folding to expand each community and covers the linearity configuration being applicable under railway scene, to reduce the number of times of cell reselection and switching.
By appropriate neighbor cell list is set, reduce unnecessary measurement, avoid the unordered gravity treatment (and switching) of side direction community, promoted the efficiency of UE mobile management; And according to the UE direction of motion, determine the Target cell of gravity treatment (or switching), improved the accuracy of UE mobile management.
The Doppler frequency shift value that the present invention has produced while having utilized UE motion is set Qhcs
s, Qhcs
netc. parameter, make under UE high-speed motion state, more easily resident in private network community, thus further improve the accuracy and efficiency of cell reselection and switching.
Accompanying drawing explanation
Fig. 1 is the wireless coverage schematic diagram of line of high-speed railway;
Fig. 2 is the system configuration schematic diagram that the present invention realizes remote radio;
Fig. 3 is the flow chart that the present invention realizes cell reselection;
Fig. 4 is that the present invention realizes the flow chart that switch community;
Fig. 5 is the building-block of logic of the first cell reselection module of the present invention;
Fig. 6 is the building-block of logic of the second cell reselection module of the present invention;
Fig. 7 is the building-block of logic of the first of the present invention community handover module;
Fig. 8 is the building-block of logic of the second of the present invention community handover module.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below with high-speed railway for exemplifying embodiment and with reference to accompanying drawing, the present invention is described in more detail.
Figure 1 shows that the different levels community example that covers hierarchical network (HCS) at line of high-speed railway.Layer A community (with
dash area shows) and a layer B community be two different levels.These two levels are geographically overlapped at line of high-speed railway and near zone; But both are at difference: level B is the cell hierarchy of common (public network), its destination service to as if not in compartment high-speed motion, be only to be geographically just in time in the UE in Along Railway region, its community is common cellular hexagonal cell.Level A is the private network cell hierarchy that covers line of high-speed railway, its destination service is to liking moving UE in compartment, the chain shape covering that is covered as of its community (is that single subdistrict covers one section of Along Railway, community and minizone are all linked with one another as chain, cover whole piece Along Railway region), it covers the technology that can adopt remote radio and dissimilar remote radio unit (RRU) (RRU) to combine that realizes.
For Remote Radio Technique, refer to: large capacity baseband processing unit (BBU) in base station is concentrated and is placed in certain central machine room, adopt optical fiber to connect and move the radio-frequency module in base station to far-end, each remote end module is called remote radio unit (RRU) (RRU).With reference to figure 2, internal structure and the operation principle of described RRU are: under baseband signal, pass through frequency conversion, filtering, be sent to feeder after rf filtering, linear power amplifier.On the UE upward signal of being about to receive through filtering, low noise amplification, RF small signals amplification filtering and down-conversion, then complete analog-to-digital conversion and Digital IF Processing etc. and be sent to Base Band Unit.Being connected between RRU and BBU can be general common radio-frequency interface (CPRI) or Open Base Station Architecture (OBASI).Refer again to shown in Fig. 1, the RRU unit that zooms out on line of high-speed railway is arranged in railway line both sides, so concentrated railway line and the both sides of having covered of its wireless signal; Simultaneously, a plurality of types different but the RRU community (RRU community refers to the region of a RRU unit institute wireless coverage) that is connected geographically by the mode of Base-Band Processing, be included into a logic district (logic district refers in base-station node a set of base-band resource and the overlay area thereof corresponding to a carrier frequency).Here can there is different geographical scenes in dissimilar RRU community, such as common Plain environment, and tunnel environment, and the tunnel face part of high ferro, rail bend partly waits some complex scenes.The RRU number merging is as long as in the scope of the base-band resource number of supporting on BBU baseband board, and merging mode is combination in any.Therefore, the covering of the logic district after merging one section of railway track along the line, and minizone interlinks, and realized linear covering.
As mentioned above, at line of high-speed railway and near zone thereof by the floored community of two different levels (private network level A and public network level B) wireless coverage overlappingly.The emphasis of being concerned about due to us is moving UE on high-speed railway, and technical problem to be solved by this invention is: how to allow these UE try one's best resident in private network community; And how these UE are carried out to more effective mobile management, refer to particularly how to allow these UE realize accurate and efficient cell reselection or switching.
In the preferred embodiment of the present invention, by RNC, cell list is optimized as follows so that UE tries one's best resident in private network community:
RNC arranges the method for neighbor cell list: for geographical position, be the community of platform, when RNC configures its neighbor cell list, the community of private network and public network be made into neighbor cell mutually; For the community of non-gate position, RNC is when the neighbor cell list of configuration private network community, and downline former and later two private network communities that are linked in Jiang Gai community are made into neighbor cell; RNC, when the neighbor cell list of configuration public network cell, adds list by prior art by all geographically adjacent communities.Further, RNC sends to all UE in this community by the system message (SIB) on this CBCH (BCH) after configuring the neighbor cell list of each community.
The optimization setting of above-mentioned neighbor cell list, its objective is that the UE dwindling in non-platform private network community wants the cell range of gravity treatment, reduce gravity treatment and measured number of times, and the unordered gravity treatment (and switching) of avoiding possible side direction community, the community being excluded is geographically adjacent public network cell, and other is as the adjacent private network community of rail infall or merger place, can be as much as possible that the UE in bullet train is resident in private network by above-mentioned setting.
As shown in Figure 3, particular content is as follows for the flow process of cell reselection:
Step 302, if UE finds whether the received signal quality value of current service cell, lower than a certain setting threshold value, meets S criterion, if meet to start, neighbor cell received signal quality is measured, execution step 303; Otherwise execution step 301;
In order to dwindle the Target cell scope of gravity treatment, in one embodiment of the present invention, the direction of motion by UE judgement self, the community of the contrary direction of motion is got rid of outside the scope of the Target cell of gravity treatment, only, to the neighbor cell calculation plot grade H in current service cell and the UE direction of motion, account form is as follows:
For current Serving cell: Hs=Qmeas, s-Qhcs
s
For neighbor cell: Hn=Qmeas, n-Qhcs
n-TO
n* Ln
Wherein, subscript s represents current service cell, and n represents neighbor cell.Qmeas represents the received signal quality value (its measurement realizes unrelated to the invention) obtaining by measuring.TO
nfor the offset parameter of different layers inter-stage community, when neighbor cell and current service cell are not same levels, Ln=1, if same level, Ln=0.
The method of the judgement UE direction of motion has multiple public technology: such as positive and negative judgement of Doppler frequency deviation (fd) that can be by UE, if that is: Doppler frequency deviation is timing, UE is to moving near NodeB, and when Doppler frequency deviation is negative, UE moves away from NodeB.The variation that the method for the judgement UE direction of motion can also be UE by the Timing Advance (TA) of the base station, respective cell measuring judges, when TA reduces, UE is near NodeB motion, and when TA increases, UE moves away from NodeB.
In another preferred embodiment of the present invention, by RNC, judge the direction of motion of a plurality of UE in community, in this case, need NodeB first the Doppler frequency shift value of these UE or TA value to be reported to RNC, then by RNC, made the direction of motion of each UE of judgement, RNC informs UE by the direction of motion again.While adopting in this way, because RNC can obtain the sample of a plurality of UE directions of motion, and can think that these UE that are in same community are on same train, therefore the direction of motion that RNC can be using the direction of motion of the most of UE that judge as all UE, has so just improved the accuracy judging.UE calculates the community grade of current service cell and neighbor cell in the following way:
The community grade point of current service cell is: Hs=Qmeas, s-Qhcs
s
The community grade point of the neighbor cell in the UE direction of motion is: Hn=Qmeas, n+Qhcs
n-TO
n* Ln
The community grade point of the neighbor cell of the contrary UE direction of motion is: Hn=Qmeas, n-Qhcs
n-TO
n* Ln
Obviously, along the neighbor cell grade of the direction of motion, want the easy neighbor cell higher than the contrary direction of motion, UE meeting gravity treatment is in correct community.
Implementation for above-mentioned cell reselection, the present invention provides respectively as the implementation structure figure of two of Fig. 5 and Fig. 6 kinds of cell reselection modules, in Fig. 5, the first cell measurement module is exported to contrary direction of motion community and is got rid of module after community received signal quality is measured, contrary direction of motion community is got rid of module and according to the UE direction of motion judged result that is positioned at the UE direction of motion judge module output of UE end, the neighbor cell of the contrary UE direction of motion is got rid of and selected outside community, then by the first community rating calculation module, rating calculation is carried out in selection community, the first gravity treatment module arrives grade Gao community according to the result gravity treatment of the first community rating calculation module.Structure shown in Fig. 6 embodiment difference corresponding with Fig. 5 is, UE direction of motion judge module is positioned at RNC end, the data that reported according to each UE by RNC comprehensively judge, obtain the exact value of the UE direction of motion and notify to UE, in addition, this embodiment Zhong community grade correcting module carries out corrected Calculation according to the judged result of the UE direction of motion to the computing formula of community grade, thus make the second gravity treatment module preferentially gravity treatment to UE direction of motion Shang community.
As shown in Figure 4, concrete steps are as follows for the flow process that switch community:
In order to reduce the scope of switchable Target cell, in one embodiment of the present invention, the direction of motion of UE judgement self, only reports the received signal quality of the neighbor cell in current service cell and the direction of motion to RNC when UE finds by measurement that the received signal quality of current service cell and/or neighbor cell meets when predefined community received signal quality reports trigger condition;
Described trigger condition is similar to the S criterion in cell reselection, by RNC, preset and be handed down to some thresholdings of UE and timer parameter, if when the measurement result of UE occurs that the signal quality of certain community has surpassed thresholding or the signal quality of neighbor cell is better than current service cell in timing, the signal quality of Ze Jianggai community reports RNC;
In order to reduce the scope of switchable Target cell, in another preferred embodiment of the present invention, the direction of motion by RNC judgement UE, because may there is judging the direction of motion and make mistakes in single UE, and RNC can obtain a plurality of direction of motion information that is in the UE in same train, reduced on the whole this judgement fallibility.Correspondingly, in step 404, UE reports the received signal quality value of all communities that meet predefined trigger condition to RNC, RNC gets rid of contrary direction of motion neighbor cell outside the Target cell of switching, and whether RNC switches according to the received signal quality judgement UE of the Target cell of described switching.
The implementation of switching for above-mentioned community, corresponding diagram 7 He Tu8Liang Zhong community handover modules realizes result figure respectively.In Fig. 7, the first measurement report reporting module that is positioned at UE end of UE end only reports the measurement report of the received signal quality of the neighbor cell in the UE direction of motion according to the judged result that is positioned at the UE direction of motion judge module of UE end, thereby makes the first handover module that is positioned at RNC end can preferentially be switched to the neighbor cell in the UE direction of motion.Embodiment illustrated in fig. 8ly be with the difference of the corresponding embodiment of Fig. 7, UE direction of motion judge module is positioned at RNC end, be positioned at the not eliminating operation to contrary direction of motion community of the second measurement report reporting module of UE end, as long as meet trigger condition neighbor cell all will be reported to the second handover module, by the second handover module, according to the judged result of UE direction of motion judge module, contrary direction of motion neighbor cell is got rid of outside the Target cell of switching, thereby performance RNC judges UE direction of motion advantage more accurately.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.
Claims (16)
1. given line is carried out a method for cell reselection along the line, it is characterized in that,
While carrying out cell reselection, user terminal UE calculates the community grade point of neighbor cell and current service cell, and carries out gravity treatment according to community grade point, and the preferential gravity treatment of UE is to the neighbor cell in the UE direction of motion;
Wherein, the preferential gravity treatment of UE comprises to the neighbor cell in the UE direction of motion:
The direction of motion of UE judgement self;
For the community of the same direction of motion, while calculating this community grade point, the community grade point of the neighbor cell in the UE direction of motion is: this neighbor cell received signal quality value Qmeas, n adds the reselection hysteresis parameter Qhcs of neighbor cell
n, when this neighbor cell and current service cell are not same level, also need to deduct the offset parameter TO of different layers inter-stage community
n; The community grade point of the neighbor cell of the contrary UE direction of motion is: this neighbor cell received signal quality value Qmeas, n deducts the reselection hysteresis parameter Qhcs of neighbor cell
n, when neighbor cell and current service cell are not same level, also need to deduct the offset parameter TO of different layers inter-stage community
n.
2. method according to claim 1, is characterized in that, the step that UE carries out cell reselection is:
A1, UE constantly measure the received signal quality of current service cell, and when UE finds that the received signal quality of current service cell is less than setting thresholding, UE measures neighbor cell received signal quality;
The direction of motion of A2, UE judgement self, gets rid of the community of the contrary direction of motion outside the scope of the Target cell of gravity treatment, only to the neighbor cell calculation plot grade in current service cell and the UE direction of motion;
The community grade point of current service cell is: current service cell received signal quality value Qmeas, s deducts current service cell reselection hysteresis parameter Qhcs
s;
A3, UE gravity treatment are arrived at setting-up time T
reselcetinteriorly can remain that community grade point is for the highest neighbor cell.
3. method according to claim 1, is characterized in that, the step that UE carries out cell reselection is:
B1, UE constantly measure the received signal quality of current service cell, and when UE finds that the received signal quality of current service cell is less than setting thresholding, UE measures neighbor cell received signal quality;
The direction of motion of B2, RNC judgement UE, and the direction of motion is informed to UE, UE calculates the community grade of current service cell and neighbor cell in the following way:
The community grade point of current service cell is: current service cell received signal quality value Qmeas, s deducts current service cell reselection hysteresis parameter Qhcs
s;
The community grade point of the neighbor cell in the UE direction of motion is: this neighbor cell received signal quality value Qmeas, n adds the reselection hysteresis parameter Qhcs of neighbor cell
n, when this neighbor cell and current service cell are not same level, also need to deduct the offset parameter TO of different layers inter-stage community
n;
The community grade point of the neighbor cell of the contrary UE direction of motion is: this neighbor cell received signal quality value Qmeas, n deducts the reselection hysteresis parameter Qhcs of neighbor cell
n, when neighbor cell and current service cell are not same level, also need to deduct the offset parameter TO of different layers inter-stage community
n;
B3, UE gravity treatment are to remaining that in setting-up time community grade point is for the highest neighbor cell.
4. method according to claim 1, is characterized in that,
Given line wireless coverage along the line is adopted to the coverage mode of private network network and public network network detach;
In private network network, RNC is the neighbor cell of current private network community by given line former and later two private network cell configuration that are connected with current private network community along the line; In public network network, the neighbor cell that RNC is current public network cell by all geographically cell configuration adjacent with current public network cell; Private network network's coverage area is along given line chain region along the line.
5. method according to claim 4, is characterized in that, the chain that adopts Remote Radio Technique and dissimilar remote radio unit (RRU) combination technique to realize described private network community in private network network covers;
Described Remote Radio Technique refers to large capacity baseband processing unit in base station to concentrate and be placed in central machine room, adopts optical fiber to connect the radio-frequency module in base station is zoomed out to given line along both side;
Described dissimilar remote radio unit (RRU) combination technique refers to that the mode by Base-Band Processing is included into a logic district by a plurality of types several far-end RF module institute overlay areas different but that be connected geographically, makes the logic district after merging cover one section of given line area along the line.
6. user terminal along given line is carried out the method that switch community, it is characterized in that,
While carrying out community switching, UE reports the measurement report of the received signal quality of neighbor cell to radio network controller (RNC), and RNC is preferentially switched to the neighbor cell in the UE direction of motion according to the direction of motion of UE;
Wherein, the step that switch UE execution community is:
The direction of motion of C1, UE judgement self, as UE, by measurement, to find that the received signal quality of current service cell and/or neighbor cell meets predefined while reporting trigger condition, only reports the received signal quality of the neighbor cell in current service cell and the direction of motion to RNC;
Whether the measurement report of the community received signal quality that C2, RNC report according to UE is adjudicated UE and is switched, and if judgement switch, adjudicate UE simultaneously and be switched to which neighbor cell; Or,
UE carries out the step of switching community:
D1, as UE, by measurement, to find that the received signal quality of current service cell and/or neighbor cell meets predefined while reporting trigger condition, reports the received signal quality of current service cell and all neighbor cells to RNC;
The direction of motion of D2, RNC judgement UE is also got rid of contrary direction of motion neighbor cell outside the selection community of switching, whether RNC adjudicates UE according to the signal quality of remaining neighbor cell and current service cell and switches, if judgement is switched, adjudicate UE simultaneously and be switched to which neighbor cell;
When UE switches, for the community of the same direction of motion, while calculating this community grade point, the community grade point of the neighbor cell in the UE direction of motion is: this neighbor cell received signal quality value Qmeas, n adds the reselection hysteresis parameter Qhcs of neighbor cell
n, when this neighbor cell and current service cell are not same level, also need to deduct the offset parameter TO of different layers inter-stage community
n; The community grade point of the neighbor cell of the contrary UE direction of motion is: this neighbor cell received signal quality value Qmeas, n deducts the reselection hysteresis parameter Qhcs of neighbor cell
n, when neighbor cell and current service cell are not same level, also need to deduct the offset parameter TO of different layers inter-stage community
n.
7. method according to claim 6, is characterized in that,
Given line wireless coverage along the line is adopted to the coverage mode of private network network and public network network detach;
In private network network, RNC is the neighbor cell of current private network community by given line former and later two private network cell configuration that are connected with current private network community along the line; In public network network, the neighbor cell that RNC is current public network cell by all geographically cell configuration adjacent with current public network cell; Private network network's coverage area is along given line chain region along the line.
8. method according to claim 7, is characterized in that, the chain that adopts Remote Radio Technique and dissimilar remote radio unit (RRU) combination technique to realize described private network community in private network network covers;
Described Remote Radio Technique refers to large capacity baseband processing unit in base station to concentrate and be placed in central machine room, adopts optical fiber to connect the radio-frequency module in base station is zoomed out to given line along both side;
Described dissimilar remote radio unit (RRU) combination technique refers to that the mode by Base-Band Processing is included into a logic district by a plurality of types several far-end RF module institute overlay areas different but that be connected geographically, makes the logic district after merging cover one section of given line area along the line.
9. user terminal along given line is carried out a system for cell reselection, it is characterized in that, comprising:
UE direction of motion judge module, for the direction of motion that judges that UE is current;
Cell reselection module, for carrying out the preferential cell reselection in neighbor cell in the UE direction of motion according to the UE direction of motion of the community grade point of neighbor cell and current service cell and the output of UE direction of motion judge module; And, while carrying out described cell reselection, be used for: for the community of the same direction of motion, while calculating this community grade point, the community grade point of the neighbor cell in the UE direction of motion is: this neighbor cell received signal quality value Qmeas, n adds the reselection hysteresis parameter Qhcs of neighbor cell
n, when this neighbor cell and current service cell are not same level, also need to deduct the offset parameter TO of different layers inter-stage community
n; The community grade point of the neighbor cell of the contrary UE direction of motion is: this neighbor cell received signal quality value Qmeas, n deducts the reselection hysteresis parameter Qhcs of neighbor cell
n, when neighbor cell and current service cell are not same level, also need to deduct the offset parameter TO of different layers inter-stage community
n;
Described UE direction of motion judge module is positioned at UE end or RNC end.
10. system according to claim 9, is characterized in that, cell reselection module comprises:
The first cell measurement module, while being less than setting thresholding for the received signal quality when UE discovery current service cell, measures neighbor cell received signal quality;
Module is got rid of in contrary direction of motion community, for the neighbor cell of the contrary UE direction of motion being got rid of outside the scope of the Target cell of gravity treatment according to the UE direction of motion of UE direction of motion judge module output;
The first community rating calculation module, for calculating the community grade of getting rid of the re-aiming community behind the contrary neighbor cell of the UE direction of motion;
The first gravity treatment module, for gravity treatment to remaining that in setting-up time community grade point is for the highest neighbor cell.
11. systems according to claim 9, is characterized in that, cell reselection module comprises:
The second cell measurement module, while being less than setting thresholding for the received signal quality when UE discovery current service cell, measures neighbor cell received signal quality;
Community grade corrected Calculation module, for calculating the community grade of current service cell and neighbor cell and according to the UE direction of motion of UE direction of motion judge module output, the grade of neighbor cell being conducive to preferential gravity treatment to the correction of the neighbor cell in the UE direction of motion;
The second gravity treatment module, for the result gravity treatment of calculating according to community grade corrected Calculation module to remaining that in setting-up time community grade point is the highest neighbor cell.
12. systems according to claim 9, is characterized in that,
Given line wireless coverage along the line is adopted to the coverage mode of private network network and public network network detach;
In private network network, RNC is the neighbor cell of current private network community by given line former and later two private network cell configuration that are connected with current private network community along the line; In public network network, the neighbor cell that RNC is current public network cell by all geographically cell configuration adjacent with current public network cell; Private network network's coverage area is along given line chain region along the line.
13. systems according to claim 12, is characterized in that, the chain that adopts Remote Radio Technique and dissimilar remote radio unit (RRU) combination technique to realize described private network community in private network network covers;
Described Remote Radio Technique refers to large capacity baseband processing unit in base station to concentrate and be placed in central machine room, adopts optical fiber to connect the radio-frequency module in base station is zoomed out to given line along both side;
Described dissimilar remote radio unit (RRU) combination technique refers to that the mode by Base-Band Processing is included into a logic district by a plurality of types several far-end RF module institute overlay areas different but that be connected geographically, makes the logic district after merging cover one section of given line area along the line.
14. 1 kinds of user terminal along given line are carried out the system that switch community, it is characterized in that, comprising:
UE direction of motion judge module, for the direction of motion that judges that UE is current;
Community handover module, switch the preferential community, neighbor cell of carrying out in the UE direction of motion for the measurement report of received signal quality and the UE direction of motion of UE direction of motion judge module output of the neighbor cell that reports according to UE; And, carry out when switch described community and be used for: for the community of the same direction of motion, while calculating this community grade point, the community grade point of the neighbor cell in the UE direction of motion is: this neighbor cell received signal quality value Qmeas, n adds the reselection hysteresis parameter Qhcs of neighbor cell
n, when this neighbor cell and current service cell are not same level, also need to deduct the offset parameter TO of different layers inter-stage community
n; The community grade point of the neighbor cell of the contrary UE direction of motion is: this neighbor cell received signal quality value Qmeas, n deducts the reselection hysteresis parameter Qhcs of neighbor cell
n, when neighbor cell and current service cell are not same level, also need to deduct the offset parameter TO of different layers inter-stage community
n;
Described UE direction of motion judge module is positioned at UE end or RNC end;
Wherein, described community handover module comprises:
The first measurement report reporting module, for finding by measurement that as UE the received signal quality of current service cell and/or neighbor cell meets the predefined received signal quality of the neighbor cell in current service cell and the UE direction of motion that reports while reporting trigger condition to the first handover module;
Whether the first handover module, adjudicate UE for the measurement report of the community received signal quality that reports according to UE and switch, and if judgement switch, adjudicate UE simultaneously and be switched to which neighbor cell;
Or,
Described community handover module comprises:
The second measurement report reporting module, for predefinedly reporting the received signal quality of current service cell and all neighbor cells to RNC while reporting trigger condition when UE finds by measurement that the received signal quality of current service cell and/or neighbor cell meets;
The second handover module, for contrary direction of motion neighbor cell being got rid of outside the selection community of switching according to the UE direction of motion of UE direction of motion judge module judgement, whether according to the signal quality of remaining neighbor cell and current service cell, adjudicate UE switches, if judgement is switched, adjudicate UE simultaneously and be switched to which neighbor cell.
15. systems according to claim 14, is characterized in that,
Given line wireless coverage along the line is adopted to the coverage mode of private network network and public network network detach;
In private network network, RNC is the neighbor cell of current private network community by given line former and later two private network cell configuration that are connected with current private network community along the line; In public network network, the neighbor cell that RNC is current public network cell by all geographically cell configuration adjacent with current public network cell; Private network network's coverage area is along given line chain region along the line.
16. systems according to claim 15, is characterized in that, the chain that adopts Remote Radio Technique and dissimilar remote radio unit (RRU) combination technique to realize described private network community in private network network covers;
Described Remote Radio Technique refers to large capacity baseband processing unit in base station to concentrate and be placed in central machine room, adopts optical fiber to connect the radio-frequency module in base station is zoomed out to given line along both side;
Described dissimilar remote radio unit (RRU) combination technique refers to that the mode by Base-Band Processing is included into a logic district by a plurality of types several far-end RF module institute overlay areas different but that be connected geographically, makes the logic district after merging cover one section of given line area along the line.
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| CN200910083021.3A CN101873566B (en) | 2009-04-24 | 2009-04-24 | Mobility management method and system of user terminal along given line |
| PCT/CN2010/072000 WO2010121549A1 (en) | 2009-04-24 | 2010-04-21 | Mobility management method and system for user terminals along fixed lines |
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