CN101043716B - Method for wireless resource management in wireless evolvement network and apparatus thereof - Google Patents
Method for wireless resource management in wireless evolvement network and apparatus thereof Download PDFInfo
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Abstract
The provided wireless resource management method in wireless evolution network comprises: a. source BS monitors the first message relative to its wireless resource management, and decides whether to trigger the wireless resource management according to the message; b. if deciding to trigger, the source BS makes the near subzone BS return the second message on wireless resource managemnt; c. with the second resource, decides to re-allocate edge wireless resource or scale switch subzone edge terminal, for the former/latter, goes to step d/e, respectively; d. executes subzone edge wireless resource re-allocation; and e. scale switches subzone edge terminals.
Description
Technical field
The present invention relates to the wireless mobile communications field, more specifically, relate to the method and the device thereof that are used for the wireless evolution network RRM.
Background technology
Universal mobile telecommunications system (Universal Mobile TelecommunicationsSystem, be abbreviated as UMTS) be to adopt Wideband Code Division Multiple Access (WCDMA) to insert (Wideband CodeDivision Multiple Access, be abbreviated as WCDMA) 3-G (Generation Three mobile communication system) (3G) of air interface technologies, also UMTS is called the WCDMA communication system usually.
Fig. 1 shows the system construction drawing of UMTS100.
As shown in Figure 1, UMTS100 has adopted and the similar structure of second generation mobile communication system (2G), comprise wireless access network (Radio Access Network, be abbreviated as RAN) 20 (promptly, UMTS Terrestrial radio access network (UMTS Territorial Radio AccessNetwork, be abbreviated as UTRAN)) and core net (Core Network is abbreviated as CN) 30.Wherein wireless access network 20 is used to handle all and wireless function associated, and core net 30 handles that all voice calls are connected with data in the UMTS100, and the exchange and the routing function of realization and external network 40.Core net 30 is from being divided into 3G CS (Circuit Switched, circuit switching) 32 and 3G PS (Packet Switched, packet switching) 34 in logic.Wireless access network 20, core net 30, constituted whole UMTS100 together with UE (User Equipment, subscriber equipment) 10.
Fig. 2 shows the network structure of UTRAN200.
As shown in Figure 2, UTRAN200 comprises one or more RNS (Radio NetworkSubsystem, RNS) 22.A RNS22 is made up of a RNC (RadioNetwork Controller, radio network controller) 24 and one or more NodeB (base station) 26.Interface between RNC24 and the core net 30 is the Iu interface, and NodeB26 is connected by Iub interface with RNC24.In UTRAN200 inside, interconnected by the Iur interface between the RNC24, the Iur interface can connect by connection of the direct physical between the RNC24 or transmission network.RNC24 is used for distributing and is attached thereto with control or the Radio Resource (Radio Resource) of relevant NodeB26.NodeB26 then finishes the conversion of the data flow between Iub interface and the Iu interface, also participates in a part of RRM simultaneously.
NodeB26 is the base station of WCDMA system, comprises radio receiving-transmitting unit and Base-Band Processing parts.By the Iub interface and the RNC24 interconnection of standard, mainly finish the processing of Iu interface physical layer protocol.Its major function is spread spectrum, modulation, chnnel coding and despreading, demodulation, channel-decoding, also comprises the functions such as mutual conversion of baseband signal and radiofrequency signal.
RNC24 is used to control the Radio Resource of UTRAN200, mainly finishes functions such as connection foundation and disconnection, switching, the merging of grand diversity, RRM control.
The above network architecture is based on the 3GPP Rel6 framework of version in the past, 3GPP (3rd Generation Partnership Project) is studying a kind of brand-new evolution network framework at present, to satisfy the application demand of mobile network in 10 years futures even longer time.Owing to be a kind of brand-new network architecture, substantial variation all will take place in all nodes, function and the flow process of therefore existing framework.Have a variety of evolution schemes to launch discussion at 3GPP at present, the purpose of network evolution is to be desirable to provide a kind of low time delay, high data rate, high power system capacity and covering, low cost, complete IP-based network.
3GPP provides a kind of wireless evolution network (LTE:Long Term Evolution, Long Term Evolution.The special use that is the long-term evolution items of network of 3GPP is write a Chinese character in simplified form), in this evolvement network, the framework of access network part is evolved to the single node framework that has only a node eNodeB by the NodeB of 3G network and two node structures of RNC.In the research of evolvement network, the design of the radio resource management function of Radio Access Network is an important problem, especially consider RRM (Radio ResourceManagement, the RRM) function between the eNodeB, as interference management, load balancing etc.At present the RRM function structure 300 of the LTE that reaches at this problem as shown in Figure 3.
Fig. 3 shows the function structure distribution map of the RRM300 of correlation technique.
In this framework 300, E1 is the air interface of UE10 and network side; E2 is a logic interfacing, and reality is made up of E1 and E3; E3 is the interface between eNodeB50 and the Centroid eCRNC (evolved Controlling RNC, evolution control RNC) 60, and this eCRNC60 has the RRM function between the eNodeB50; E4 is the interface in the user plane of eNodeB and core net node; The similar existing Iu interface of E5 is the interface between access network and the core net; E6 is chain of command and the interface in the user plane between MME/ASGW (Mobility ManagementEntity/Access Gateway, mobile management entity/IAD) 80 and the mobile anchor point (not shown); E7 provides eNodeB and gateway module 70 (O﹠amp; M Node, Operations﹠amp; Maintenance Node, operation and maintenance node) interface between.
Under this framework, the RRM function is mainly finished at eNodeB50, and other are then mainly finished by Centroid eCRNC60 as the RRM function between eNodeB50.
When the RRM function of carrying out between eNodeB50, need obtain the RRM information of adjacent eNodeB50, obtaining of RRM information in this framework is to finish by the E3 interface, promptly provide local RRM information to Centroid eCRNC by each eNodeB50, eCRNC is responsible for collecting these RRM information, and finishes RRM function between corresponding eNodeB50 based on these information.
Most of wireless communication systems all are based on so-called multiple access techniques, transmit therein such as the information of voice-and-data.This is a kind of many users who activates simultaneously share the same system resource in organized mode a technology.
In using the 3G network of CDMA technology, because the pseudo orthogonal code that adopts, so exist the phase mutual interference between a plurality of users in sub-district.On the traditional sense, this interference is considered to destroy the part of the inevitable noise of transmission.
In the evolvement network that uses CDMA technology, between the different user of same sub-district because the mutually orthogonal of subcarrier, do not have inter-user interference in theory, and when minizone employing similar frequency bands, the interference of minizone then becomes the key factor that influences systematic function.Therefore people need realize the interference management and the load balancing of minizone in wireless evolution network, promptly need be in wireless evolution network managing radio resources.
Yet a problem is, only defined the framework of RRM system in correlation technique, do not provide the concrete scheme that how to realize interference management and load balancing under this framework.And need to exist an independently RRM server node in this framework, the RRM information between each eNodeB and this isolated node will waste a large amount of signalings alternately.
Describe the soft multiplexing solution of Radio Resource in the correlation technique with reference to Fig. 4 and Fig. 5 below, this scheme has solved the interference problem of cell edge, also can provide the availability of frequency spectrum preferably simultaneously.
Fig. 4 shows a kind of radio gradual network structure that does not have radio support server of two-layer node; Fig. 5 shows the soft multiplexing schematic diagram of Radio Resource.
In the framework 400 as shown in Figure 4, neither one independently radio support server node removes to handle the radio resource management function of minizone, and the minizone radio resource management function is distributed in the different base station 420.There is interface X1 between base station 420 and the IAD 410, also has interface X2 between base station 420 and the base station 420.Among the present invention program, all have interface between not all base station 420, have interface between 420 of each base stations and the base station 420 that is adjacent.
The resource of minizone adopts the soft multiplexing method of Radio Resource, be that each sub-district is divided into two parts in center and marginal zone, the marginal zone is the zone that has signal to intersect with other sub-districts, the marginal zone of each sub-district by static or semi-static distribution the part Radio Resource, the Radio Resource that the marginal zone of neighbor cell is assigned to is disjoint.The base station is in the process of carrying out professional transmitting and scheduling, and at first scheduling is in the UE of marginal zone, and the Radio Resource of its scheduling can only be in its Radio Resource of assigning to; After the UE of marginal zone scheduling was finished, scheduling was in the UE of center again, and its schedulable Radio Resource is all Radio Resources that are left.The part resource allocation of cell edge can change with the long cycle, guaranteed the optimization of resource in long-time.Such scheme has solved the interference problem of cell edge, and the availability of frequency spectrum preferably (it is soft multiplexing that the allocation of radio resources scheme that the sub-district is divided into edge and center calls Radio Resource) also can be provided simultaneously.The resource allocation of this scheme as shown in Figure 5.
Yet, this scheme only limits to solve the interference problem of cell edge, its at be the solution of physical layer, and, still do not provide concrete solution for the RRM of how realizing under the LTE framework shown in Figure 3 based on interference management and load balancing.
Therefore, people need a solution, can solve the problem in the above-mentioned correlation technique, are used at the wireless evolution network managing radio resources.
Summary of the invention
The present invention aims to provide the method that has overcome one or more problems that limitation and defective owing to prior art cause basically.Purpose of the present invention is exactly to provide the method that the distributed earth that does not need the independent radio resources management node in a kind of wireless evolution network carries out interference management and load balancing, solves the minizone RRM problem in the evolvement network.
According to an aspect of the present invention, a kind of radio resource management method is provided, be used at the wireless evolution network managing radio resources, it is characterized in that may further comprise the steps: step a, the source cell base station monitoring first information relevant with the RRM of cell-of-origin of cell-of-origin judges whether to trigger the RRM process according to the first information; Step b, after determine triggering, source cell base station make the neighbor cell base station of the neighbor cell of cell-of-origin return with neighbor cell between the second relevant information of RRM; Step c, utilize second information, judgement is to carry out the heavy allocation process of cell edge radio resource, still carry out the cell edge terminal and criticize hand-off process, when determining that carrying out cell edge radio resource weighs allocation process, then proceed to steps d, when determining that carrying out the cell edge terminal criticizes hand-off process, then proceed to step e; Steps d is carried out the heavy allocation process of cell edge radio resource; And step e, carry out the cell edge terminal and criticize hand-off process.
Has the interface that is used to communicate by letter between source cell base station and the neighbor cell base station.
Step c may further comprise the steps: step c1, utilize second information, and judge whether to carry out the heavy allocation process of cell edge radio resource, if, then proceed to steps d, if be otherwise proceed to step c2 for being; And step c2, utilize second information, judge whether to carry out the cell edge terminal and criticize hand-off process, if for being then to proceed to step e.
During step a may further comprise the steps at least one: step a1, when source cell base station was judged the Radio Resource dispatched that needs increase edge, cell-of-origin, source cell base station determined to trigger the RRM process; And step a2, when source cell base station judged that the dispatched set of radio resources at edge, cell-of-origin need be switched to other Radio Resources gets on, source cell base station determined to trigger the RRM process.
Step a1 comprises that when the load of the edge of cell-of-origin surpassed a predetermined threshold value, source cell base station was judged the Radio Resource dispatched that needs to increase the edge, cell-of-origin; And step a2 comprise when the Radio Resource the dispatched channel condition variation of distributing to the edge, cell-of-origin originally when being lower than another predetermined threshold value, source cell base station judges that the dispatched set of radio resources at edge, cell-of-origin need be switched to other Radio Resources gets on.
Step b may further comprise the steps: step b1, and source cell base station sends minizone RRM request to neighbor cell base station, requires neighbor cell base station that second information is provided; And step b2, neighbor cell base station is returned second information in response to minizone RRM request to source cell base station.
Second information comprises at least a in the following information: the distribution of sub-district total load, cell edge load, cell edge load and the distribution of the wireless channel conditions of cell edge on frequency domain.
Steps d may further comprise the steps: steps d 1, according to second information, utilize another pre-defined algorithm to carry out reshuffling of cell edge radio resource distribution, so that operate accordingly first sub-district in cell-of-origin and the neighbor cell, it comprises first operation or second operation, wherein first operation is to make first sub-district abdicate first's Radio Resource, and makes the cell-of-origin increase first's Radio Resource; And second operation be to make the cell-of-origin abdicate the second portion Radio Resource to use for first sub-district, and make first sub-district abdicate the third part Radio Resource to use for the cell-of-origin; Steps d 2, source cell base station send the edge resource reconfiguration request according to the result of steps d 1 to the base station of first sub-district; Corresponding the 3rd operation is carried out according to the edge resource reconfiguration request in the base station of steps d 3, the first sub-districts; After corresponding operating is handled in the base station of steps d 4, the first sub-districts, send edge radio resource to source cell base station and reshuffle the affirmation signaling, edge radio resource is reshuffled and is confirmed to comprise the wireless resource information that first sub-district has locked in the signaling; Steps d 5, receive edge radio resource reshuffle confirm signaling after, source cell base station determines final reconfiguration parameters, and carries out reshuffling of local edge radio resource according to the wireless resource information that has locked; And steps d 6, after finishing the reshuffling of local edge radio resource, source cell base station is reshuffled to the base station of first sub-district transmission edge radio resource and is finished signaling, first sub-district is reshuffled according to edge radio resource and is finished signaling and carry out its corresponding the 4th operation, wherein, edge radio resource is reshuffled and is finished signaling and comprise final reconfiguration parameters.
The edge resource reconfiguration request comprises the indication about first's Radio Resource, second portion Radio Resource or third part Radio Resource.
The 3rd operation comprises: if first operation, then with first's Radio Resource locking; And if second operation, then except the second portion Radio Resource is locked, also the third part Radio Resource is joined in the edge radio resource of first sub-district, wherein, if first's Radio Resource or second portion Radio Resource can't be abdicated in first sub-district, then the present situation according to first sub-district locks the 4th part Radio Resource, abdicates the operation to the cell-of-origin, starts timer then.
The 4th operation may further comprise the steps: remove timer; Reshuffle according to final reconfiguration parameters; And with the Radio Resource release that locks.
Step e may further comprise the steps: step e1, source cell base station is according to the metrical information of second information, the first information and terminal to report, select the Target cell of to be switched terminal and switching, and send batch handoff request to the target cell base station of Target cell, comprise to be switched terminal information tabulation in batch handoff request; Step e2, target cell base station reserves batch switchable resource and carries out context maintenance in response to batch handoff request; Step e3, target cell base station sends batch switching to source cell base station and confirms signaling; Step e4, source cell base station sends switching command by air interface (eating dishes without rice or wine) to relevant terminal after receiving batch switching affirmation signaling; And step e5, after relevant terminal is received switching command, carry out normal follow-up switching flow at each terminal.
According to a further aspect in the invention, a kind of wireless resource management apparatus is provided, be used at the wireless evolution network managing radio resources, it is characterized in that comprising: trigger module, be used to make the source cell base station monitoring first information relevant of cell-of-origin, judge whether to trigger the RRM process according to the first information with the RRM of cell-of-origin; Information reading module is used for after determine triggering, make source cell base station make the neighbor cell base station of the neighbor cell of cell-of-origin return with neighbor cell between the second relevant information of RRM; Handle determination module, be used to utilize second information, judgement is to carry out the heavy allocation process of cell edge radio resource, still carry out the cell edge terminal and criticize hand-off process, when determining that carrying out cell edge radio resource weighs allocation process, then carry out the heavy distribution module of cell edge radio resource, when determining that carrying out the cell edge terminal criticizes hand-off process, then carry out the cell edge terminal and criticize handover module; The heavy distribution module of cell edge radio resource is used to carry out the heavy allocation process of cell edge radio resource; And the cell edge terminal criticizes handover module, is used to carry out the cell edge terminal and criticizes hand-off process.
By technique scheme, the present invention has realized following technique effect:
The RRM framework that the present invention provides no longer needs an independently server node, and the mode that employing is obtained is as required obtained the wireless resource management information between each cell base station, and this has just farthest reduced needed signaling traffic load.
In addition, the present invention has also clearly defined the implementation procedure of RRM in the radio support server, and has provided the edge load and reshuffle and criticize the concrete signaling process that switches.For the RRM of how realizing under the LTE framework based on interference management and load balancing, this has just provided a concrete solution.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the system construction drawing of UMTS;
Fig. 2 shows the network structure of UTRAN;
Fig. 3 shows the function structure distribution map of the RRM of correlation technique;
Fig. 4 shows a kind of radio gradual network structure that does not have radio support server of two-layer node;
Fig. 5 shows the soft-frequency reuse schematic diagram;
Fig. 6 shows the flow chart according to the radio resource management method of principle of the present invention;
Fig. 7 shows the block diagram according to the wireless resource management apparatus of principle of the present invention;
Fig. 8 shows the signaling process that cell edge radio resource according to an embodiment of the invention heavily distributes;
Fig. 9 shows the scene that switching is criticized in the sub-district of carrying out according to an embodiment of the invention; And
Figure 10 shows the signaling process that switching is criticized in sub-district according to an embodiment of the invention.
Embodiment
Describe the present invention below with reference to the accompanying drawings in detail.
At radio gradual network structure shown in Figure 4, when the edge of some sub-districts load is heavier,, provided two kinds of processing modes according to principle of the present invention:
Want the distribution of some edge resource from the lighter sub-district of contiguous load there, be called cell edge radio resource and heavily distribute;
Allow the part UE of this sub-district switch to the lighter sub-district of contiguous load, be called the cell edge terminal and criticize switching.
Above-mentioned dual mode is complementary, in the process of whole load balancing and interference management, unites employing as the case may be.
Below with reference to Fig. 6 and Fig. 7 principle of the present invention is described.
Fig. 6 shows the flow chart according to the radio resource management method of principle of the present invention; And Fig. 7 shows the block diagram according to the wireless resource management apparatus of principle of the present invention.
As shown in Figure 6, the radio resource management method according to principle of the present invention may further comprise the steps:
This method begins,
In step S102, source cell base station is monitored the RRM relevant information of this sub-district, determines whether RRM process between triggering cell according to this information;
In step S104, after determining triggering, source cell base station at first makes neighbor cell base station return its wireless resource management information;
In step S106, utilize this information, determine to carry out the heavy allocation process of cell edge radio resource, still carry out the cell edge terminal and criticize hand-off process, when determining that carrying out cell edge radio resource weighs allocation process, then proceed to step S108, when determining that carrying out the cell edge terminal criticizes hand-off process, then proceed to step S110;
In step S108, carry out the heavy allocation process of cell edge radio resource; And
In step S110, carry out the cell edge terminal and criticize hand-off process;
Method ends then.
As shown in Figure 7, the wireless resource management apparatus 500 according to principle of the present invention comprises:
Trigger module 510 is used for the RRM relevant information that source cell base station is monitored this sub-district, determines whether RRM process between triggering cell according to this information;
Information reading module 520 is used for after determining triggering, and source cell base station at first makes neighbor cell base station return its wireless resource management information;
Handle determination module 530, be used to utilize this information, determine to carry out the heavy allocation process of cell edge radio resource, still carry out the cell edge terminal and criticize hand-off process, when determining that carrying out cell edge radio resource weighs allocation process, then carry out the heavy distribution module 540 of cell edge radio resource, when determining that carrying out the cell edge terminal criticizes hand-off process, then carry out the cell edge terminal and criticize handover module 550;
The heavy distribution module 540 of cell edge radio resource is used to carry out the heavy allocation process of cell edge radio resource; And
The cell edge terminal is criticized handover module 550, is used to carry out the cell edge terminal and criticizes hand-off process.
With reference to Fig. 8 to Figure 10 specific embodiment according to radio resource management method of the present invention is described below.
Fig. 8 shows the signaling process that cell edge radio resource according to an embodiment of the invention heavily distributes; Fig. 9 shows the scene that switching is criticized in the sub-district of carrying out according to an embodiment of the invention; Figure 10 shows the signaling process that switching is criticized in sub-district according to an embodiment of the invention.
The signaling process that cell edge radio resource is reshuffled as shown in Figure 8.Example only provides two adjacent cell base stations among the figure.In the standard cellular cell system, the adjacent area of each sub-district normally is 6, that is to say that the step S204 to S206 among the figure communicates by letter with 6 adjacent cell base stations, and the sub-district that generally need change is 3, that is to say that the step S208 to S218 among the figure communicates by letter with 3 adjacent cell base stations.
The signaling process that cell edge radio resource is reshuffled is described in detail as follows:
In step S202, source cell base station is monitored the RRM relevant informations such as load information of this sub-district, and the RRM process between triggering cell in both cases: 1) the edge load of this sub-district surpasses a certain threshold value, and the Radio Resource dispatched that needs to increase this cell edge is judged in the base station of this sub-district; 2) wireless channel conditions of this sub-district changes, and the Radio Resource the dispatched channel condition of distributing to this cell edge originally becomes very poor, and the base station of this sub-district judges that the dispatched set of radio resources at edge need be switched to other Radio Resources gets on;
In step S204, source cell base station is triggered after the RRM process of minizone, at first sends minizone RRM request to its all neighbor cell base station, requires adjacent base station that necessary minizone RRM relevant information is provided;
In step S206, after neighbor cell base station receives minizone RRM request, according to the requirement in the signaling, return corresponding radio resource management information to source base station, this information comprises: the distribution of sub-district total load, cell edge load, cell edge load and the distribution of the wireless channel conditions of cell edge on frequency domain;
In step S208, after source cell base station receives the wireless resource management information that all neighbor cell base station return, information is handled, and according to reshuffling that certain algorithm carries out that cell edge radio resource distributes, this reprovision is equipped with two kinds of situations: 1) allow neighbor cell abdicate the part Radio Resource, this sub-district increases this a part of Radio Resource that adjacent sub-district is abdicated; 2) and neighbor cell replacing section Radio Resource, promptly this sub-district is abdicated the part Radio Resource and is used for adjacent sub-district, and adjacent sub-district is abdicated other a part of Radio Resource and used for this sub-district.If the Radio Resource replacement operator is carried out in the source cell base station decision, the part Radio Resource that then at first this sub-district need be transfered locks, and is not used further to the scheduling of resource of edge termination;
In step S210, source cell base station is according to result, and the adjacent base station of needs being done corresponding operating sends the edge resource reconfiguration request, comprises Radio Resource indication and this sub-district Radio Resource indication of abdicating the adjacent sub-district of needs to be abdicated in this signaling;
In step S212, the cell base station of receiving the edge resource reconfiguration request carries out corresponding operating according to the indication in the signaling.If abdicate Radio Resource, then with the Radio Resource locking that requires in the signaling to abdicate, if Radio Resource displacement, the then Radio Resource locking except requiring in the signaling to abdicate also joins the Radio Resource to be replaced that provides in the signaling in the edge radio resource of this sub-district simultaneously and goes.Under the situation of abdicating Radio Resource in the edge resource reconfiguration request signaling can't be satisfied in the sub-district, then according to the present situation lock part Radio Resource of sub-district, after finishing corresponding operating, start timer, if that does not receive source cell base station before timer expiry has heavily assigned signaling, think that then the resource of this locking is successfully abdicated;
In step S214, the adjacent cell base station of handling corresponding operating sends edge radio resource to source cell base station and reshuffles the affirmation signaling, comprises the wireless resource information that this sub-district has locked in the signaling;
In step S216, receive all edge radio resources reshuffle confirm signaling after, the wireless resource information that source cell base station has locked according to neighbor cell, determine final reconfiguration parameters, and carry out reshuffling of local edge radio resource, comprising that the Radio Resource that adjacent sub-district is abdicated is brought in the edge radio resource goes, and before the part of a locking Radio Resource of replacing away from edge radio resource, delete fully; And
In step S218, after finishing the reshuffling of local edge radio resource, source cell base station is reshuffled to corresponding adjacent cell base station transmission edge radio resource and is finished signaling, comprise final reconfiguration parameters in this signaling, receive the adjacent sub-district removing timer of this signaling, and reshuffle according to the reconfiguration parameters in the signaling, with the resource release of original locking, flow process finishes simultaneously.
Since adjacent sub-district step S206 to wireless resource information between the S210 may change (as other sub-districts require this sub-district carry out edge radio resource distribute reshuffle), therefore the step S212 of the adjacent sub-district of part operation may be failed, under the situation of failure, adjacent sub-district is with returned edge Radio Resource reconfiguration failure signaling, comprise failure cause in the signaling, and up-to-date RRM relevant information.If source cell base station is received the edge radio resource reconfiguration failure signaling of any one sub-district, do not receive at the appointed time perhaps that all edge radio resources are reshuffled and finish signaling, then do not carry out step S216, send edge radio resource to these adjacent sub-districts simultaneously and reshuffle the cancellation signaling, require the operation before of adjacent cell recovery, comprise the release of resource, prevent that the part sub-district from abdicating resource, and the abnormal conditions of resource are not abdicated in the part sub-district in addition.
For some sub-districts, if its discovery self edge load is overweight, simultaneously neighbor cell can't be abdicated edge radio resource or neighbor cell and abdicate behind the part edge Radio Resource self edge load when still overweight because load is unbalanced, can consider the part terminal in this sub-district is switched to the lighter adjacent sub-district of load.This situation mainly appears at terminal in this cell edge region the time pockety.Scene as shown in Figure 9.The edge load of sub-district 0 is heavier, but there are five edge loads also heavier in its adjacent sub-district, therefore can't allow wherein three sub-districts abdicate edge radio resource, at this moment, by further analysis as can be known, the edge of sub-district 0 load mainly is distributed in the boundary with sub-district 3, and the edge of sub-district 3 load light (total load is also lighter), then can switch to some terminals of sub-district 0 and sub-district 3 boundaries in the sub-district 3 this moment goes, and can finish the function of load balance equally.
The signaling process that the cell edge terminal is criticized switching as shown in figure 10.
The signaling process that the cell edge terminal is criticized switching is described in detail as follows:
In step S302, with cell edge radio resource distribute to reshuffle flow process identical, at first trigger the process that source cell base station is carried out the minizone RRM;
In step S304, source cell base station is triggered after the RRM process of minizone, at first sends minizone RRM request to its all neighbor cell base station, requires adjacent base station that necessary minizone RRM relevant information is provided;
In step S306, after neighbor cell base station receives minizone RRM request, according to the requirement in the signaling, return corresponding radio resource management information to source base station, this information comprises: the distribution of sub-district total load, cell edge load, cell edge load and the distribution of the wireless channel conditions of cell edge on frequency domain;
In step S308, after cell base station receives the wireless resource management information that all neighbor cell base station return, information is handled, and according to reshuffling that certain algorithm carries out that cell edge radio resource distributes, when finding to carry out reshuffling of edge radio resource distribution, and can carry out terminal and criticize when switching, trigger the flow process of back;
In step S310, source cell base station is according to wireless resource management information, the wireless resource management information in this sub-district and the metrical information of terminal to report of the adjacent sub-district that has just obtained, the terminal that selection will be switched and the Target cell of switching, and, comprise to be switched end message tabulation in this signaling to the target cell base station transmission batch handoff request of switching;
In step S312, the target cell base station of switching reserves batch switchable resource and carries out context maintenance in response to this batch handoff request;
In step S314, target cell base station sends batch switching affirmation signaling to source cell base station then;
In step S316, source cell base station sends switching command by eating dishes without rice or wine to relevant terminal after receiving batch switching affirmation signaling; And
In step S318, after terminal is received switching command, carry out normal follow-up switching flow at each terminal.
In above-mentioned two flow processs, step S302 is identical to effect and the process of S306, all belongs to the process of obtaining adjacent cell information.From this process as can be seen, among the present invention program, obtaining of cell information is to realize in the time of need carrying out the operation of minizone RRM in this sub-district just to carry out, and that is to say, is that just the whereabouts neighbor cell will these information when these information of needs are handled calculating.Such framework, it is minimum to guarantee that the wireless resource management information interactive signaling is carried out in the minizone.Simultaneously, this also makes whole flow process will increase the time-delay of step S304 to S306, but for the function of load balance, the time scale of its triggering is tens seconds at least, and step S304 has only a few tens of milliseconds to the time-delay of S306, and such time-delay is negligible fully.
Therefore, the present invention has realized following technique effect:
The RRM framework that the present invention provides no longer needs an independently server node, and the mode that employing is obtained is as required obtained the wireless resource management information between each cell base station, and this has just farthest reduced needed signaling traffic load.
In addition, the present invention has also clearly defined the implementation procedure of RRM in the radio support server, and has provided the edge load and reshuffle and criticize the concrete signaling process that switches.For the RRM of how realizing under the LTE framework based on interference management and load balancing, this has just provided a concrete solution.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. radio resource management method is used for it is characterized in that may further comprise the steps at the wireless evolution network managing radio resources:
Step a, the source cell base station monitoring first information relevant with the RRM of described cell-of-origin of cell-of-origin judges whether to trigger the RRM process according to the described first information;
Step b, after determining triggering, described source cell base station makes the neighbor cell base station of the neighbor cell of described cell-of-origin return described cell-of-origin second information relevant with the RRM between the described neighbor cell;
Step c, utilize described second information, judgement is to carry out the heavy allocation process of cell edge radio resource, still carry out the cell edge terminal and criticize hand-off process, when determining that carrying out described cell edge radio resource weighs allocation process, then proceed to steps d, when determining that carrying out described cell edge terminal criticizes hand-off process, then proceed to step e;
Described steps d is carried out the heavy allocation process of described cell edge radio resource; And
Described step e carries out described cell edge terminal and criticizes hand-off process,
Wherein, the described first information comprises the load information of cell-of-origin, and described second information comprises at least a in the following information: the distribution of sub-district total load, cell edge load, cell edge load and the distribution of the wireless channel conditions of cell edge on frequency domain.
2. radio resource management method according to claim 1 is characterized in that, has the interface that is used to communicate by letter between described source cell base station and the described neighbor cell base station.
3. radio resource management method according to claim 1 is characterized in that, described step c may further comprise the steps:
Step c1 utilizes described second information, judges whether to carry out the heavy allocation process of described cell edge radio resource, if for being, then proceed to described steps d, if be otherwise proceed to step c2; And
Described step c2 utilizes described second information, judges whether to carry out described cell edge terminal and criticizes hand-off process, if for being then to proceed to described step e.
4. radio resource management method according to claim 1 is characterized in that, at least one during described step a may further comprise the steps:
Step a1, when described source cell base station was judged the Radio Resource dispatched that needs increase edge, described cell-of-origin, described source cell base station determined to trigger described RRM process; And
Step a2, when described source cell base station judged that the dispatched set of radio resources at edge, described cell-of-origin need be switched to other Radio Resources gets on, described source cell base station determined to trigger described RRM process.
5. radio resource management method according to claim 4 is characterized in that,
Described step a1 comprises that when the load of the edge of described cell-of-origin surpassed a predetermined threshold value, described source cell base station was judged the Radio Resource dispatched that needs to increase edge, described cell-of-origin; And
Described step a2 comprise when the Radio Resource the dispatched channel condition variation of distributing to edge, described cell-of-origin originally when being lower than another predetermined threshold value, described source cell base station judges that the dispatched set of radio resources at edge, described cell-of-origin need be switched to other Radio Resources gets on.
6. radio resource management method according to claim 1 is characterized in that, described step b may further comprise the steps:
Step b1, described source cell base station sends minizone RRM request to described neighbor cell base station, requires described neighbor cell base station that described second information is provided; And
Step b2, described neighbor cell base station is returned described second information in response to the RRM request of described minizone to described source cell base station.
7. radio resource management method according to claim 1 is characterized in that, described steps d may further comprise the steps:
Steps d 1 according to described second information, utilizes algorithm to carry out reshuffling of cell edge radio resource distribution, so that operate accordingly first sub-district in described cell-of-origin and the described neighbor cell, it comprises first operation or second operation, wherein
Described first operation is to make described first sub-district abdicate first's Radio Resource, and makes described cell-of-origin increase described first Radio Resource; And
Described second operation is to make described cell-of-origin abdicate the second portion Radio Resource to use for described first sub-district, and makes described first sub-district abdicate the third part Radio Resource to use for described cell-of-origin;
Steps d 2, described source cell base station send the edge resource reconfiguration request according to the result of described steps d 1 to the base station of described first sub-district;
Steps d 3, the base station of described first sub-district are carried out corresponding the 3rd operation according to described edge resource reconfiguration request, and wherein, described the 3rd operation comprises:
If described first operation, then with the Radio Resource locking of described first; And
If described second operation then except with described second portion Radio Resource locking, also joins described third part Radio Resource in the edge radio resource of described cell-of-origin, wherein,
If described first Radio Resource or described third part Radio Resource can't be abdicated in described first sub-district, then the present situation according to described first sub-district locks the 4th part Radio Resource, abdicate operation, start timer then to described cell-of-origin;
Steps d 4, after described corresponding operating is handled in the base station of described first sub-district, send edge radio resource to described source cell base station and reshuffle the affirmation signaling, described edge radio resource is reshuffled and is confirmed to comprise the wireless resource information that described first sub-district has locked in the signaling;
Steps d 5, receive described edge radio resource reshuffle confirm signaling after, described source cell base station determines final reconfiguration parameters according to the described wireless resource information that has locked, and carries out reshuffling of local edge radio resource; And
Steps d 6, after finishing the reshuffling of local edge radio resource, described source cell base station is reshuffled to the base station of described first sub-district transmission edge radio resource and is finished signaling, described first sub-district is reshuffled according to described edge radio resource and is finished signaling and carry out its corresponding the 4th operation, wherein, described edge radio resource is reshuffled and is finished signaling and comprise described final reconfiguration parameters, and described the 4th operation comprises:
Remove described timer;
Reshuffle according to described final reconfiguration parameters; And
Radio Resource release with locking.
8. radio resource management method according to claim 7 is characterized in that, described edge resource reconfiguration request comprises the indication about described first Radio Resource, described second portion Radio Resource or described third part Radio Resource.
9. radio resource management method according to claim 1 is characterized in that, described step e may further comprise the steps:
Step e1, described source cell base station is according to the metrical information of described second information, the described first information and terminal to report, select the Target cell of to be switched terminal and switching, and send batch handoff request to the target cell base station of described Target cell, comprise described to be switched terminal information tabulation in the described batch of handoff request;
Step e2, described target cell base station reserves batch switchable resource and carries out context maintenance in response to described batch of handoff request;
Step e3, described target cell base station sends batch switching to described source cell base station and confirms signaling;
Step e4, described source cell base station sends switching command by eating dishes without rice or wine to relevant terminal after receiving described batch of switching affirmation signaling; And
Step e5 after corresponding terminal is received described switching command, carries out the normal follow-up switching flow at each terminal.
10. wireless resource management apparatus is used for it is characterized in that comprising at the wireless evolution network managing radio resources:
Trigger module is used to make the source cell base station of cell-of-origin to monitor the first information relevant with the RRM of described cell-of-origin, judges whether to trigger the RRM process according to the described first information;
Information reading module is used for making described source cell base station make the neighbor cell base station of the neighbor cell of described cell-of-origin return described cell-of-origin second information relevant with the RRM between the described neighbor cell after determining triggering;
Handle determination module, be used to utilize described second information, judgement is to carry out the heavy allocation process of cell edge radio resource, still carry out the cell edge terminal and criticize hand-off process, when determining that carrying out described cell edge radio resource weighs allocation process, then carry out the heavy distribution module of cell edge radio resource, when determining that carrying out described cell edge terminal criticizes hand-off process, then carry out the cell edge terminal and criticize handover module;
The heavy distribution module of described cell edge radio resource is used to carry out the heavy allocation process of described cell edge radio resource; And
The cell edge terminal is criticized handover module, and be used to carry out described cell edge terminal and criticize hand-off process,
Wherein, the described first information comprises the load information of cell-of-origin, and described second information comprises at least a in the following information: the distribution of sub-district total load, cell edge load, cell edge load and the distribution of the wireless channel conditions of cell edge on frequency domain.
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| CN102340803A (en) * | 2010-07-16 | 2012-02-01 | 中兴通讯股份有限公司 | Method and device for parameter reconfiguration in wireless communication system |
| CN102958060A (en) * | 2011-08-26 | 2013-03-06 | 中兴通讯股份有限公司 | Device and method for triggering wireless resource reconfiguration |
| CN103650586B (en) * | 2011-12-22 | 2017-11-17 | 华为技术有限公司 | A kind of cell switching method, base station and communication system |
| CN103687012B (en) * | 2012-09-14 | 2019-01-18 | 中兴通讯股份有限公司 | The method and device of dynamic spectrum resource management in cognitive radio system |
| CN103702421B (en) * | 2012-09-28 | 2017-12-26 | 电信科学技术研究院 | A kind of local management of public resources method and apparatus |
| CN103369534B (en) * | 2012-12-31 | 2016-05-11 | 上海华为技术有限公司 | A kind of wireless resource management algorithm adaptive configuring method and controller |
| CN110958623B (en) * | 2018-09-27 | 2023-05-09 | 华为技术有限公司 | Cell configuration method and device |
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