CN102595500B - load management method and device - Google Patents
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- CN102595500B CN102595500B CN201110007922.1A CN201110007922A CN102595500B CN 102595500 B CN102595500 B CN 102595500B CN 201110007922 A CN201110007922 A CN 201110007922A CN 102595500 B CN102595500 B CN 102595500B
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Abstract
The present invention relates to a kind of load management method and device, in the method, network side performs following steps: the channel request receiving the terminal transmission residing in Serving cell, Serving cell is preset and is initiated to share across cell channel the upper load limit threshold value taken, wherein, Serving cell allow initiate across cell channel share take and current loads is greater than upper load limit threshold value time, judge initiate across cell channel share take, otherwise judge do not initiate across cell channel share take; Whether initiate to share across cell channel to take according to upper load limit threshold decision; When judging to initiate to take across cell channel is shared, adjacent cell is selected also to carry out channel allocation; To set up in the adjacent cell of allocated channel with terminal interaction and call out.Load management method of the present invention and device can realize load management, avoid Serving cell overload.
Description
Technical field
The present invention relates to the communication technology, load management method and device in especially a kind of field of mobile communication.
Background technology
In radio honeycomb mobile communication system, the basic function of channel allocation is to provide Traffic Channel, and improves the utilance of system resource as much as possible, the distribution of equalizing system resource and distribution.Channel allocation technique mainly contains 3 classes: fixed channel assignment (FCA), dynamic channel allocation (DCA) and accidental channel distribute (RCA).
What current use was many is fixed channel assignment, system is the radio carrier frequency of each cell site configuration some, for the service request of user residing in cellular-specific community, system only distributes the usable radio resources of this community for it, if do not have Radio Resource can with (comprising preemptible Radio Resource), this service request failure.This just proposes very high requirement to the configuration of cellular cell and deployment, particularly there is provisional jumbo business demand for some community, not often that optimization and a large amount of redundancies of design phase can solve, so in current wireless mobile environment and limited Radio Resource, no matter how to optimize the configuration of the Radio Resource of community, as long as adopt fixed channel assignment mode, Radio Resource must be caused to distribute between different districts and use uneven situation.
Along with the development of 3G network technology, to the management of Radio Resource, particularly channel allocation field, more propose dynamic channel allocation and accidental channel distribution, and unify controls 3G or the 2/3G even Radio Resource of the heterogeneous network such as other wireless access by introducing joint radio resource management (CRRM) network element, but technology is very unripe accordingly, have yet in conceptual phase and experimental stage, and relative system complex structure, the complexity of realization is also higher.
In radio communication, intercell load balancing technique receives publicity always, the technology of current comparative maturity has the switching based on load, community user high for load is switched to the relatively low community of load by system automatically in the conceived case, but which increases the handover overhead of system, switch the load of heavy system again to a certain extent when high load capacity, and switching call drop may be caused.
Directed retry technology also plays the effect of load balancing to a certain extent, the object of directed retry is when not having available resource in current area, automatically mobile phone can be transferred to around to have vacant resource and meet in the community of speech quality and go, thus improve call completing rate and the service ability of network.The roughly process of directed retry is such: when base station controller receives the assignment request of mobile switching centre, first attempt finding available resource in current area, if can not find, then according to the measurement report of mobile phone, determine the community that can meet speech quality around, attempt from these cell allocation resources, once Resourse Distribute and being successfully established, then complete a directed retry.If object community and cell-of-origin be not at same base station controller, then it is exterior orientation retry; If at same base station controller, then it is inner orientation retry.It should be noted that, when signaling channel is just set up, may not have enough measurement reports to judge have which community can meet the call demand of mobile phone around, therefore directed retry starts to need certain stand-by period, there to be sufficient measurement report to make decisions.Directed retry can carry out repeatedly when examining report is allowed, thus makes the service quality of system obtain large increase.But current directed retry for Target cell channel conditions and be indifferent to, probably cause directed retry or failure, need to carry out multiple bearing retry, substantially prolongs the turn-on time of calling.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of load management method and device, to realize load management, avoids Serving cell overload.
For solving above technical problem, the invention provides a kind of load management method, in the method, network side performs following steps:
Receive the channel request of the terminal transmission residing in Serving cell, described Serving cell is preset and is initiated to share across cell channel the upper load limit threshold value taken;
Whether initiate to share across cell channel to take according to described upper load limit threshold decision, wherein, described Serving cell allow to initiate across cell channel share take and current loads is greater than described upper load limit threshold value time, judge to initiate to share across cell channel to take, otherwise judge not initiate to share across cell channel to take;
When judging to initiate to take across cell channel is shared, adjacent cell is selected also to carry out channel allocation;
To set up in the adjacent cell of allocated channel with described terminal interaction and call out.
Further, adjacent cell is selected and the step of carrying out channel allocation comprises:
Obtain the adjacent cell of described Serving cell;
Carry out channel allocation in each adjacent cell successively, until be allocated successfully at certain adjacent cell channel, flow process terminates; Otherwise carry out channel allocation in described Serving cell.
Further, described adjacent cell allows other communities to initiate to share across cell channel the community taken, or allow other communities to initiate to share across cell channel the community taken, and the load of this adjacent cell does not reach default forbids that the load lower threshold taken is shared in other communities across cell channel.
Further, each adjacent cell presses level intensity and/or the number of channel sequence of this adjacent cell in order to share of this adjacent cell that present terminal is measured.
Further, described upper load limit threshold value is described community fully loaded 80% to 95%.
For solving above technical problem, present invention also offers a kind of load management device, this device comprises:
Channel request receiver module, for receiving the channel request of the terminal transmission residing in Serving cell, described Serving cell is preset and is initiated to share across cell channel the upper load limit threshold value taken;
Share across cell channel and take judge module, for whether initiating according to described upper load limit threshold decision to share across cell channel take, wherein, described Serving cell allow to initiate across cell channel share take and current loads is greater than described upper load limit threshold value time, judge to initiate to share across cell channel to take, otherwise judge not initiate to share across cell channel to take;
Channel assignment module, when judging to initiate to take across cell channel is shared, selects adjacent cell also to carry out channel allocation;
Call setup module, to set up in the adjacent cell of allocated channel with described terminal interaction and calls out.
Load management method of the present invention and device initiate to share across cell channel the upper load limit threshold value taken to needing the Serving cell of carrying out load management to pre-set, whether initiate to share across cell channel to take according to described upper load limit threshold decision, by the reasonable setting of upper load limit threshold value, avoid current service cell overload, while realizing Load balanced control, ensure signal quality.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of load management method of the present invention;
Fig. 2 is the schematic diagram of adjacent cell queue order two priority classes parameter;
Fig. 3 initiates to share across cell channel the threshold parameter relation schematic diagram taken;
Fig. 4 is the channel assignment procedures figure that the embodiment of the present invention takies based on Channel Sharing;
Fig. 5 is the signaling process figure that the embodiment of the present invention switches when moving caller letter of application signaling channel;
Fig. 6 is the modular structure schematic diagram of load management device of the present invention.
Embodiment
In view of the existing switching based on load adds the handover overhead of system, the load of heavy system again is to a certain extent switched when high load capacity, and may cause switching call drop, so can select to carry out during persistent district before user calls out to reach load balancing based on the dynamic channel allocation of minizone Channel Sharing when load balancing or user call out will be a kind of effectively to improve.User before calling is selected just to carry out intercell load balance policy during persistent district, there is such problem, business might not be had because resident, resident equilibrium can not reflect the equilibrium of real time business, thus the present invention propose do real-time dynamic assignment when terminal originating service and load management has better dynamic property.
The main thought of load management method of the present invention and device initiates to share across cell channel the upper load limit threshold value taken to needing the Serving cell of carrying out load management to pre-set, whether initiate to share across cell channel to take according to described upper load limit threshold decision, by the reasonable setting of upper load limit threshold value, avoid current service cell overload, while realizing Load balanced control, ensure signal quality.
As shown in the figure, in load management method of the present invention, network side performs following steps and comprises:
Step 101: the channel request receiving the terminal transmission residing in Serving cell, described Serving cell is preset and is initiated to share across cell channel the upper load limit threshold value taken;
Understandably, for the different network architectures, the network element performing network side function of the present invention is different, as in the 2G network architecture, base station controller (BSC) can be had to realize, in 3G network framework, then can be realized by radio network controller (RNC), hereinafter, be described for the 2G network architecture.
The present invention is mainly in order to solve the dynamic channel allocation of community, initiated to take across the Channel Sharing of community by base station controller when Serving cell Radio Resource reaches certain SC service ceiling, and switch the Channel Sharing realized across community during calling by similar directed retry and take.
To avoid from the general extent initiating to share across cell channel to take as far as possible, add some expenses after all, if but by the time initiate to share across cell channel the object taking and just can not play real dynamic load equilibrium less than allowing again during channel in the application of this Serving cell, now cause the probability of call failure very high.Simultaneously, consider that the mobile subscriber in a Serving cell successfully can initiate directed retry or share across cell channel to take, such as, when the specific position residing for certain mobile subscriber, when all possible gravity treatment and switching cell are only this Serving cells oneself, this user just can only use the channel resource of this community when initiating channel request because it does not have can effective adjacent cell of shared channel.So community initiates to share across cell channel to take in advance, thus retain this Serving cell part Radio Resource service request of this part special user just can not be made can to expire and be not being met by Serving cell load because of unique, this is also an exemplary advantage of dynamic channel allocation.
Initiate to share across cell channel the upper load limit threshold value taken and adopt BUSY_THRESHOLD_OUT Parametric Representation, the determination of BUSY_THRESHOLD_OUT parameter fundamentally determines and affects to share across cell channel and takies played load balancing effect, when this optimum configurations is less, mean that system takies frequently initiating to share across cell channel, considerable influence is had to the efficiency of system and stability, when this optimum configurations is larger, the effect of system loading equilibrium is by not obvious, it is special in this parameter is 100%, actual effect of the present invention is just as common directed retry.
Preferably, the span of BUSY_THRESHOLD_OUT is 80% to 95%, can determine according to the configuration of concrete cell channel and neighbor cell configuration situation in enforcement, key to be carried out the effect of frequency that conservative control shares across cell channel and load balancing.
Alternatively, Serving cell can also arrange control switch, SHARE_SWITCH_OUT, whether can initiate Channel Sharing to other adjacent cells in order to indicate this community as Serving cell to take, so, realize dynamic channel allocation of the present invention and static channel allocation not contradiction, based on the superposition of dynamic channel allocation just on original static channel allocation algorithm that Channel Sharing takies, and completely can be controlled whether to open the dynamic channel assignment scheme taken based on Channel Sharing by this SHARE_SWITCH_OUT switch.If switch cuts out will affect original static channel allocation algorithm hardly.
Step 102: whether initiate to share across cell channel to take according to described upper load limit threshold decision, wherein, described Serving cell allow to initiate across cell channel share take and current loads is greater than described upper load limit threshold value time, judge to initiate to share across cell channel to take, otherwise judge not initiate to share across cell channel to take;
Intelligible, when mobile terminal proposes service request in its resident Serving cell, base station controller is that this service request is at this Serving cell request channel, if when the busy channel resource of this Serving cell meets or exceeds the upper load limit threshold value of setting, judge to initiate to share across cell channel to take, otherwise perform static channel allocation flow process in current service cell.
Step 103: when judging to initiate to take across cell channel is shared, select adjacent cell also to carry out channel allocation;
Particularly, this step 103 comprises:
103a) obtain the adjacent cell of described Serving cell;
The adjacent cell obtained can be all adjacent cells in the physical significance of current service cell, in order to improve the efficiency of channel allocation, also the adjacent cell conformed to a predetermined condition can therefrom be filtered out, if these adjacent cells allow other communities to initiate to share across cell channel the community taken, or allow other communities to initiate to share across cell channel the community taken, and the load of this adjacent cell does not reach default forbids that the load lower threshold taken is shared in other communities across cell channel, other communities are also namely allowed to share the upper load limit threshold value taken across cell channel.
In order to further improve the efficiency of channel allocation, these adjacent cells can adopt the mode of adjacent cell list and sort by certain strategy, as, the level intensity sequence of this adjacent cell measured by present terminal, or by the number of channel sequence of this adjacent cell in order to share, or press level intensity and the number of channel sequence of this adjacent cell in order to share of this adjacent cell that present terminal is measured.Below provide a kind of preferred sortord:
Base station controller based on mobile terminal to the real-time measurement of adjacent cell and on respond with terminal example and organize relevant information of adjacent cells, comprise adjacent cell signal strength signal intensity, adjacent cell load, whether adjacent cell supports that Channel Sharing takies, so just this mobile terminal can be found fast and accurately effectively can to use channel adjacent cell when each mobile terminal initiates channel request, and make decisions and whether initiate Channel Sharing and take.
The effective adjacent cell list meeting gravity treatment or switching condition that base station controller will measure in real time for this user terminal, obtain the resource information of each adjacent cell, comprise this adjacent cell and whether allow Channel Sharing, signal quality and the number of channel that can be used for sharing of this adjacent cell.Whether the list of effective adjacent cell will allow Channel Sharing according to this adjacent cell, the overall target of the number of channel that the signal quality of this adjacent cell and this adjacent cell can be shared sorts, and select optimum adjacent cell as the target adjacent section of Channel Sharing, and in a call this user is switched to new community.
As shown in Figure 2, adjacent cell queue order two priority classes parameter Key value can be DWORD (without symbol double word) type, Bit31 ~ Bit0 respectively from a high position to low level, be divided into three sections to define, wherein high-order Bits31 represents whether this adjacent cell allows other communities to initiate Channel Sharing to it and take, 1 represents permission, and 0 expression does not allow; Meta Bit30 to Bit16 is the level intensity that current mobile terminal measures this adjacent cell, and Bit15 to Bit0 is the number of channel that this adjacent cell can be shared.The adjacent cell that Key value is larger comes prioritizing selection above.
Simultaneously in order to improve the search efficiency that Channel Sharing takies, can also be that M limits by the maximum adjacent cell number can initiating Channel Sharing in configuration service community.Such as the adjacent cell number of a Serving cell configuration itself is N, so M will be less than N, because a Serving cell user, he may detect multiple effective adjacent cell, but in order to improve the channel request particularly search efficiency that takies of Channel Sharing, all can not inquire about and channel allocation all these adjacent cells, so arrange M, be limited within an effective scope, to reduce time delay during calling by sharing search across cell channel at every turn.
103b) carry out channel allocation in each adjacent cell of described adjacent cell list successively, until be allocated successfully at certain adjacent cell channel, step 103 flow process terminates; Otherwise carry out channel allocation in described Serving cell.
The idiographic flow of step 103b vide infra embodiment.
Step 104: to set up in the adjacent cell of allocated channel with described terminal interaction and call out.
Switching during calling is realize a technical essential of the present invention, need slightly to make improvements call flow, although the signaling process that directed retry has switched when having defined calling, but mainly for the switching of Traffic Channel, and general channel request, the particularly channel request of speech business, there are two processes, letter of application signaling channel before this, apply for Traffic Channel again, also two kinds of situations are had so switch when making a call in principle, because the not enough Channel Sharing will initiated across community of the corresponding Radio Resource in this community takies switching in time being at letter of application signaling channel, the signaling channel of two Shi Yuan communities is enough, apply for Traffic Channel time inadequate resource just the Channel Sharing initiated across community take switching, the present invention supports both of these case.
For data service, there is not the concept of switching in itself, no matter be at packet transfer mode or at packet idle mode, all the program of cell reselection will be adopted, particularly for the community that there is grouping Dedicated Control Channel, data service is more flexible in the selection and channel allocation of community, can business start or business carrying out in by the relatively random selection Serving cell of certain rule, so it is convenient to initiate to take process across the Channel Sharing of community for data service, direct use is of the present invention to be shared across cell channel the allocation flow taken and just can select suitable community and suitable Radio Resource.
Embodiment
Understandably, each community may be the Serving cell of terminal or the adjacent cell of Serving cell, preferably, each community can arrange four cell-level controling parameters, first be two control switchs, whether SHARE_SWITCH_OUT and SHARE_SWITCH_IN, SHARE_SWITCH_OUT Shi Zhe community can initiate Channel Sharing to other adjacent cells as Serving cell takies, and whether SHARE_SWITCH_IN Shi Zhe community allows other communities to initiate Channel Sharing to it as adjacent cell takies.These two controling parameters also can adopt the mode of default setting to realize.Next is two threshold parameter BUSY_THRESHOLD_OUT and BUSY_THRESHOLD_IN, when BUSY_THRESHOLD_OUT Shi Zhe community is as Serving cell, just can initiate Channel Sharing to suitable adjacent cell when cell load is greater than this threshold value to take, when BUSY_THRESHOLD_IN Shi Zhe community is as adjacent cell, just allows other communities to initiate Channel Sharing to it when cell load is less than this threshold value and take.
The determination of BUSY_THRESHOLD_OUT parameter fundamentally determines and affects to share across cell channel and takies played load balancing effect, BUSY_THRESHOLD_IN parameter relative effect is less, which adjacent area its effect mainly selects more suitable when Channel Sharing takies, preferably, as shown in Figure 3, this parameter is less than the BUSY_THRESHOLD_OUT of this community, otherwise this community all will outwards be initiated Channel Sharing and be occupied, but also allow others to take the channel of oneself, such Channel Sharing takies and just enters chaotic vicious circle.This parameter minimum to 0 time, also just equal the situation of getting back to common directed retry, directed retry is carried out using as unique selection in this community.
When the span of BUSY_THRESHOLD_OUT is 80% to 95%, preferably, the span of BUSY_THRESHOLD_IN is 60% to 75%.
This two threshold parameters are effectively set, can avoid on the one hand sharing to take across cell channel too spreading unchecked, macroscopically ensure that each cell serves is in the stability of the radio channel resource of this community.Play again the effect of good load balancing on the other hand.
Hereinafter will be described in detail to embodiments of the invention by reference to the accompanying drawings.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
As shown in Figure 4, this flow process comprises the following steps:
Step 401, base station controller receive channel request message;
When mobile terminal initiates business application in its resident Serving cell, channel request message arrives base station controller from the base station of Serving cell, and first base station controller is its allocated channel;
Step 402, base station controller, according to the configuration of this Serving cell, mobile terminal place and channel load situation, determines that the Channel Sharing whether initiated across community takies;
If (1) this community does not allow the Channel Sharing initiated across community to take, SHARE_SWITCH_OUT is "No"; Or (2) SHARE_SWITCH_OUT be "Yes" but the load of this community do not reach initiate share across cell channel the lower limit BUSY_THRESHOLD_OUT taken; Then the Channel Sharing do not initiated across community takies flow process, directly enter step 408, otherwise, Ji Zhe community allow to initiate across cell channel share take and current loads is greater than described upper load limit threshold value time, judge to initiate to share across cell channel to take and enter step 403;
Step 403, acquisition can initiate the adjacent cell list that Channel Sharing takies, according to the adjacent cell list information that mobile terminal measures in real time, and the adjacent cell list information of this Serving cell configuration, obtain M adjacent cell, and M is less than the adjacent cell number N of this Serving cell fixed configurations;
These adjacent cells sort by the Key value of Fig. 2, and Key value more senior general is more preferentially selected.Because the adjacent cell only in this base station controller inside effectively could obtain this adjacent cell and whether allow the number of channel information that Channel Sharing takies and this adjacent cell can be shared, the adjacent cell of non-base station controller system inside will only have signal strength information, therefore the community in adjacent cell list is preferably the community of this base station controller system inside, arrange rule according to above Key value, the Key value highest order of the community in adjacent cell list is 1.For the situation of multimode, as 2/3G common mode, so intrasystem adjacent cell also can enter this adjacent cell list, such as 2G network congestion, and the calling so initiated at 2G cell can automatically switch to intrasystem 3G community.
According to above meaning of parameters, whether this adjacent cell allows other communities to initiate to have taken two conditions across the Channel Sharing of community to it:
(1) this community allows other communities to initiate to take across the Channel Sharing of community to it, and SHARE_SWITCH_IN is "Yes"; And
(2) this cell load does not reach and allows other communities to initiate to share across cell channel the upper load limit BUSY_THRESHOLD_IN taken to it.
If above-mentioned condition is set up, the highest order of the Key value of corresponding adjacent cell in list queue is 1.
Allow the computational methods of the number of channel of Channel Sharing as follows:
This adjacent cell channel sum × (load that this adjacent cell of the BUSY_THRESHOLD_OUT-of this adjacent cell is current)
Step 404, judges the adjacent cell list obtained, if adjacent cell list is empty, then directly enters step 408, otherwise enters step 405;
Step 405, select the adjacent cell of current queue foremost, the adjacent cell that namely Key value is maximum, carries out channel allocation in this adjacent cell;
Step 406, if channel allocation success, then directly enters step 407, otherwise the adjacent cell of adjacent cell list queue foremost is removed, and reenter step 404;
Step 407, by handover mechanism during calling, is switched to the successful adjacent cell of this channel allocation, and sets up calling by mobile terminal;
Step 408, performs static channel allocation flow process in former Serving cell;
Step 409, channel allocation success, then perform step 410, otherwise perform step 411;
Step 410, sets up calling in this community;
Step 411, this call request failure.
Switch for during calling, if the switching of Traffic Channel, agreement flow process is completely the same with the directed retry specified at present, does not need to make an amendment.When letter of application signaling channel, what the present invention proposed also supports that the Channel Sharing across community takies, need here to do a simple explanation to concrete signaling process.
As shown in Figure 5, for the situation of letter of application signaling channel, step 407 specifically comprises the following steps:
Step 501, when base station controller receives Signaling Channel Request message, and current service cell meet initiate signaling channel share across community the condition taken, namely initiate Channel Activation instruction directly to meeting the adjacent cell base station that takies across community;
Step 502, beams back Channel Activation ACK message to base station controller after this adjacent cell base station receives Channel Activation instruction;
Step 503, base station controller sends switching command to the base station of the current service cell of mobile terminal, carries the base station information switching adjacent cell in switching command;
Step 504, the base station of the current service cell of mobile terminal sends switching command to this mobile terminal after receiving switching command;
Step 505, sends to new adjacent cell base station after mobile terminal receives switching command and switches access message;
Step 506, adjacent cell base station sends switching detection message to base station controller after receiving and switching access message, and the physical message completed between this base station and mobile terminal is mutual;
Wherein, at Um Interface, SABM (SetAsynchronousBalancedMode arranges Asynchronous Balanced Mode) frame is that on LAPDm layer, the message that a multiframe response operation mode connects is set up in request.After adjacent cell base station receives SABM frame, loopback UA (confirming without numbering) frame, as the response to SABM frame, shows between MS and adjacent cell base station, established a LAPDm path; In addition, the message field of this UA frame comprises a same L3 message, and after MS receives this message, the content corresponding to the SABM frame that oneself sends compares, and only has when just the same, just thinks to be accepted by system.Comprise the IMSI of MS in L3 message, IMSI is unique to each MS, and this can ensure to only have a MS to can be accessed by system on this channel.
Step 507, after completing the information interaction with mobile terminal, adjacent cell base station sends link setup Indication message to base station controller.
Step 508, when complete with the information interaction of adjacent cell base station after, mobile terminal to adjacent cell base station send handoff completion message.
Step 509, after adjacent cell base station receives handoff completion message, forwards handoff completion message to base station controller.
Step 510, at this moment base station controller is waited and is sent CR (ConnectionRequest, request link setup) message to core net, and CR message carries call request and location updating message.
Arrive here, switched during the calling of signaling channel, system enters conventional signaling process.
Be more than the preferred embodiment that provides of the present invention and signaling process, facilitate those skilled in the art to grasp and realize this technology.Here embodiment mainly utilizes the speech business of 2G network to introduce, and for the situation that data service and 2/3G common mode switch mutually, also can be convenient to use method provided by the invention to be optimized and improve.So relevant optimization and improvement also belong to interest field of the present invention.
In sum, the present invention takies by sharing across the dynamics of channels of community, the balanced to a certain extent use of Radio Resource, well avoids some community because of the traffic load of burst and occur heavy congestion and the very idle situation in neighbor cell.Simultaneously because just done the load balancing of minizone when the channel allocation of call phase, also the generation of follow-up optimization action is avoided to a certain extent, the triggering such as reducing the cell merge brought because of load balancing and the extra overhead brought thus.And this is a complete dynamic real-time process, even if the load of such as certain community is very high, but also not necessarily need to do the handover between cells based on load, add to come in because this community probably no longer includes new calling, that is load balancing is trigger according to the real-time initiation of terminal call completely, is real dynamic as required.
Certainly, the present invention also has certain overhead, is first to share in order to the dynamic channel realized across community, adds the complexity that base station controller controls, and will realize switching when calling out, and adds somewhat to the time delay of access.In order to make the successful shared across cell channel, the plot planning of allocating cell Channel Sharing also be there are certain requirements with covering.
Meanwhile, the present invention is also one optimization to directed retry and development.Current directed retry mainly causes to assign unsuccessfully in current area because without reasons such as available resources and just initiates to be equivalent to retrospective call setup, and the present invention proposes just to carry out the trial being similar to directed retry in advance after current cell load reaches certain threshold value.Second, current directed retry for Target cell channel conditions and be indifferent to, probably cause directed retry or failure, need to carry out multiple bearing retry, substantially prolongs the turn-on time of calling, and the present invention switches the channel conditions understood and needed the community switching when calling out, when selecting to switch adjacent cell according to the principle that the adjacent cell that channel relative free is more is preferential, and be just whether carry out when a channel request taking across the shared judgement of cell channel and initiation Channel Sharing, better play the effect of load balancing.
Corresponding to above method, present invention also offers a kind of load management device, corresponding to the different network architectures, this device can realize at different network elements, and as in the 2G network architecture, this device can realize at base station controller, as in 3G network framework, this device realizes at radio network controller, as shown in Figure 6, comprising:
Channel request receiver module, for receiving the channel request of the terminal transmission residing in Serving cell, described Serving cell is preset and is initiated to share across cell channel the upper load limit threshold value taken;
Share across cell channel and take judge module, for whether initiating according to described upper load limit threshold decision to share across cell channel take, wherein, described Serving cell allow to initiate across cell channel share take and current loads is greater than described upper load limit threshold value time, judge to initiate to share across cell channel to take, otherwise judge not initiate to share across cell channel to take;
Channel assignment module, when judging to initiate to take across cell channel is shared, selects adjacent cell also to carry out channel allocation;
Call setup module, to set up in the adjacent cell of allocated channel with described terminal interaction and calls out.
Further, described channel assignment module comprises:
Adjacent cell obtains submodule, for obtaining the adjacent cell of described Serving cell;
Channel allocation submodule, for carrying out channel allocation in each adjacent cell successively, until be allocated successfully at certain adjacent cell channel, otherwise carries out channel allocation in described Serving cell.
The adjacent cell that adjacent cell obtains submodule acquisition allows other communities to initiate to share across cell channel the community taken, or allow other communities to initiate to share across cell channel the community taken, and the load of this adjacent cell does not reach default forbids that the load lower threshold taken is shared in other communities across cell channel.
Further, each adjacent cell that described adjacent cell acquisition submodule obtains presses level intensity and/or the number of channel sequence of this adjacent cell in order to share of this adjacent cell that present terminal is measured.
Preferably, described upper load limit threshold value (BUSY_THRESHOLD_OUT) is described community fully loaded 80% to 95%, and described load lower threshold (BUSY_THRESHOLD_IN) is described community fully loaded 60% to 75%.
The present invention in the minizone based on honeycomb by taking the dynamic channel allocation realizing global cell homeostasis of load across the Channel Sharing of community, and mobile terminal can be switched to the effective adjacent cell can lending channel smoothly from former Serving cell, achieve the use that Radio Resource is balanced as far as possible between different cellular cells, and improve the call completing rate of system to a certain extent, reduce call loss.
The all or part of step that one of ordinary skill in the art will appreciate that in said method is carried out instruction related hardware by program and is completed, and described program can be stored in computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can use one or more integrated circuit to realize.Correspondingly, each module/submodule in above-described embodiment can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Claims (10)
1. a load management method, is characterized in that, the real-time initiation according to terminal call triggers load balancing, just carries out intercell load equilibrium when the channel allocation in terminal call stage, and network side performs following steps:
Receive the channel request of the terminal transmission residing in Serving cell, described Serving cell is preset and is initiated to share across cell channel the upper load limit threshold value taken;
Whether initiate to share across cell channel to take according to described upper load limit threshold decision, wherein said Serving cell allow to initiate across cell channel share take and current loads is greater than described upper load limit threshold value time, judge to initiate to share across cell channel to take, otherwise judge not initiate to share across cell channel to take;
When judging to initiate to take across cell channel is shared, adjacent cell is selected also to carry out channel allocation;
To set up in the adjacent cell of allocated channel with described terminal interaction and call out.
2. the method for claim 1, is characterized in that: select adjacent cell and the step of carrying out channel allocation comprises:
Obtain the adjacent cell of described Serving cell;
Carry out channel allocation in each adjacent cell successively, until be allocated successfully at certain adjacent cell channel, flow process terminates; Otherwise carry out channel allocation in described Serving cell.
3. method as claimed in claim 1 or 2, it is characterized in that: described adjacent cell allows other communities to initiate to share across cell channel the community taken, or allow other communities to initiate to share across cell channel the community taken, and the load of this adjacent cell does not reach default forbids that the load lower threshold taken is shared in other communities across cell channel.
4. method as claimed in claim 2, is characterized in that: the level intensity of this adjacent cell that each adjacent cell is measured by present terminal and/or the number of channel sequence of this adjacent cell in order to share.
5. the method for claim 1, is characterized in that: described upper load limit threshold value is described community fully loaded 80% to 95%.
6. a load management device, is characterized in that, the real-time initiation according to terminal call triggers load balancing, and just carry out intercell load equilibrium when the channel allocation in terminal call stage, this device comprises:
Channel request receiver module, for receiving the channel request of the terminal transmission residing in Serving cell, described Serving cell is preset and is initiated to share across cell channel the upper load limit threshold value taken;
Share across cell channel and take judge module, for whether initiating according to described upper load limit threshold decision to share across cell channel take, wherein, described Serving cell allow to initiate across cell channel share take and current loads is greater than described upper load limit threshold value time, judge to initiate to share across cell channel to take, otherwise judge not initiate to share across cell channel to take;
Channel assignment module, when judging to initiate to take across cell channel is shared, selects adjacent cell also to carry out channel allocation;
Call setup module, to set up in the adjacent cell of allocated channel with described terminal interaction and calls out.
7. device as claimed in claim 6, it is characterized in that, described channel assignment module comprises:
Adjacent cell obtains submodule, for obtaining the adjacent cell of described Serving cell;
Channel allocation submodule, for carrying out channel allocation in each adjacent cell successively, until be allocated successfully at certain adjacent cell channel, otherwise carries out channel allocation in described Serving cell.
8. device as claimed in claim 7, it is characterized in that: the adjacent cell that described adjacent cell obtains submodule acquisition allows other communities to initiate to share across cell channel the community taken, or allow other communities to initiate to share across cell channel the community taken, and the load of this adjacent cell does not reach default forbids that the load lower threshold taken is shared in other communities across cell channel.
9. device as claimed in claim 7, is characterized in that: the level intensity of this adjacent cell that each adjacent cell that described adjacent cell obtains submodule acquisition is measured by present terminal and/or the number of channel sequence of this adjacent cell in order to share.
10. device as claimed in claim 6, is characterized in that: described upper load limit threshold value is described community fully loaded 80% to 95%.
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| CN201110007922.1A CN102595500B (en) | 2011-01-14 | 2011-01-14 | load management method and device |
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| CN1553739A (en) * | 2003-05-26 | 2004-12-08 | 华为技术有限公司 | Method for realizing laminated plot interlayer loading balance |
| CN101345985A (en) * | 2007-07-12 | 2009-01-14 | 华为技术有限公司 | Method and device for improving resource utilization rate in radio communication system |
| CN101772081A (en) * | 2008-12-31 | 2010-07-07 | 中兴通讯股份有限公司 | Method and system for dynamically balancing cell load in wireless network |
| CN101841850A (en) * | 2009-03-18 | 2010-09-22 | 大唐移动通信设备有限公司 | Method, device and system for acquiring neighboring cell load information from LTE system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1553739A (en) * | 2003-05-26 | 2004-12-08 | 华为技术有限公司 | Method for realizing laminated plot interlayer loading balance |
| CN101345985A (en) * | 2007-07-12 | 2009-01-14 | 华为技术有限公司 | Method and device for improving resource utilization rate in radio communication system |
| CN101772081A (en) * | 2008-12-31 | 2010-07-07 | 中兴通讯股份有限公司 | Method and system for dynamically balancing cell load in wireless network |
| CN101841850A (en) * | 2009-03-18 | 2010-09-22 | 大唐移动通信设备有限公司 | Method, device and system for acquiring neighboring cell load information from LTE system |
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