CN101406095B - Coordination control method for radio resources in distributed wireless system - Google Patents
Coordination control method for radio resources in distributed wireless system Download PDFInfo
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- CN101406095B CN101406095B CN2007800097132A CN200780009713A CN101406095B CN 101406095 B CN101406095 B CN 101406095B CN 2007800097132 A CN2007800097132 A CN 2007800097132A CN 200780009713 A CN200780009713 A CN 200780009713A CN 101406095 B CN101406095 B CN 101406095B
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Abstract
A method is provided for coordinating distributed radio resource management. The method comprises communicating information between a plurality of units having radio resource management responsibilities, wherein the communicated information is related to radio resources associated with each unit.
Description
Technical field
The present invention relates generally to telecommunications, relates more specifically to radio communication.
Background technology
In the field of wireless telecommunications, cell phone for example, exemplary systems 100 as shown in fig. 1 is a kind of hierarchical structures, and comprises a large amount of base stations 130 (for example NodeB) that are distributed in a certain area, system provides service to the base station.The various 120 (AT that access terminal in this area, also be referred to as subscriber equipment (UE), mobile device etc.) can be linked into system by one or more base stations 130, and and then insert other interconnected telecommunication system, for example public switched telephone system (PSTN) 160 and data network 125.Typically, access terminal 120 through certain when zone, 120 moving along with accessing terminal, it keeps by communicating by letter with one and another base station 130 and the communicating by letter of system 100.Access terminal and 120 can communicate by letter with nearest base station 130, base station 130 has the strongest signal, and base station 130 has the ability of enough received communications etc.Then, communicate by letter with radio network controller (RNC) 138 in base station 130, and this radio network controller 138 is communicated by letter with the packet data serving node (PDSN) 164 in the core net 165.Each RNC138 and PDSN164 can support a large amount of base stations 130.Like this, 120 move and when communicating by letter with different base station 130, it can also be communicated by letter with PDSN164 with different RNCs 138 when accessing terminal.
However, industrial hope development has the UMTS of distributed radio resource management (RRM) structure, and does not use RNC138.Because the RRM function is arranged in different physical locations, the complexity of switching and alleviate interference in the distributed RRM structure increases.
Summary of the invention
The present invention pays close attention to the effect that above-mentioned one or more problems are provided.Summary of the present invention is described below, so that the basic comprehension of some aspect of the present invention to be provided.This is generally if it were not for exhaustive overview of the present invention.This summary neither be tended to determine key point of the present invention or describe scope of the present invention.The sole purpose of this summary is to represent some notion in simple mode, with the preorder as the following detailed description of being discussed.
One aspect of the present invention provides a kind of method that is used to regulate distributed radio resource management.This method is included in transmission information between a large amount of unit with provided for radio resources management responsibility, and wherein the information of Chuan Diing relates to the radio resource relevant with each unit.
Description of drawings
The present invention can by with reference to accompanying drawing in the following description that combines obtain understanding, wherein identical label is represented components identical, wherein:
Fig. 1 is the module map of prior art communication system, for example according to the universal mobile telephone system (UMTS) of one embodiment of the invention;
Fig. 2 A and 2B are the module map of the part of communication system, and for example the present invention can find Long Term Evolution (LTE) UMTS of application; With
Fig. 3 is the embodiment of a flow chart, the method that representative can be used for regulating radio resource.
Though the present invention can accept different modifications and optional form, only shows its certain embodiments by the example in the accompanying drawing, and is described in detail in this article.However, should be understood that, here the description of specific embodiment is not meaned the present invention is limited to specific forms that on the contrary, intention is to comprise all modifications that can fall in the spirit and scope of the invention that the accessory claim book limited, is equal to and replaces.
Embodiment
Embodiment shown in the present is described below.For the sake of clarity, be not that features all in the actual execution mode is all described in this specification.Certainly should recognize, in the development of any of these practical embodiments, can make the decision of a large amount of specific implementations, to reach developer's specific purpose, for example be adapted to the constraint with relevant system and res gestae, practical embodiments can be changed to another kind of execution mode from a kind of execution mode.In addition, should recognize that such development may be complicated and time-consuming, but will be one undoubtedly guarantees that those skilled in the art obtain the route of the benefit of the disclosure content.
Each several part of the present invention and corresponding details are described and can be represented with the form of the symbolic representation of the software in the computer storage or algorithm and data bit operation.Persons skilled in the art can be pass on the essence of its work to other persons skilled in the art by these descriptions and statement.As the employed term of this paper and employed usually, algorithm is considered the independent process sequence of guiding expected result.These steps are the steps that need the physical operations of physical quantity.Usually, though may not be necessary, these amounts show as and are stored, send, make up, relatively or the form of light, electricity or the magnetic signal of other operation.Prove that mainly for the reason of general common usage, it is very easily sometimes that these signals are called bit, value, element, symbol, character, item, numeral etc.
What should remember is that however, all these or similar term will be associated with suitable physical quantity, and just be used for the mark easily of this tittle.Unless stated otherwise, not so, from discuss, it is evident that, refer to such as " processing " or " calculating " or " statistics " or " determining " or " demonstration " or similar term, computer system or the similarly action and the operation of electronic computing device, they will be represented the data manipulation of physical quantity in the RS of computer system, electric weight or be converted into other data of representing the physical quantity in computer system memory or register or other similar information storage, transmission or the display device similarly.
Be noted that also the software of carrying out some aspect of the present invention is encoded on certain type the program recorded medium usually, perhaps the transmission media implementation by certain type.Program recorded medium can be magnetic (as floppy disk or hard disk) or light (as the Zip disk read-only memory, or " CDROM "), can read-only or arbitrary access.Similarly, transmitting medium can be twisted-pair feeder, coaxial cable, optical fiber or the transmission medium that other are fit to more well known in the art.The invention is not restricted to these aspects of any given execution mode.
Now with reference to accompanying drawing the present invention is described.Schematically described different structure, system and equipment in the accompanying drawings,, rather than well known to a person skilled in the art details and make the present invention become unclear with these only with laying down a definition.Yet illustrative example of the present invention is described and explained to included accompanying drawing.Here employed speech should be understood and interpreted to phrase has those speech and the consistent meaning of understanding with various equivalent modifications of phrase.Do not have the specific definitions of phrase or term, that is to say, with understood by one of ordinary skill in the art common and the custom the different definition of the meaning, tend to represent by term or the phrase of this paper.In this sense, term or phrase intention have certain sense, promptly different with the meaning understood by one of ordinary skill in the art meanings, such specific definitions will propose in specification expressly in clear and definite mode, directly and uniquely provide specific meanings for this term or phrase.
Turn to accompanying drawing now, particularly 2A with reference to the accompanying drawings according to one embodiment of present invention, shows communication system 200.In order to describe, the communication system 200 among Fig. 2 is universal mobile telephone system (UMTS) Long Term Evolution (LTE), but should be understood that the present invention can be applied to support other system of data and/or voice communication.UMTS system 100 among UMTS LTE system 200 and Fig. 1 has some similarities, but in the operating aspect of relevant base station 130 of the present invention and RNC138 the different of essence is arranged.Communication system 200 allows one or more accessing terminal 120 to communicate with one or more enhancement mode Node B (eNodeB) 230.A large amount of eNodeB230 and IAD (ASGW) 238 couplings.ASGW238 is responsible for communicating with PSTN160 and/or data network 125 (referring to Fig. 1) subsequently.On the function, communication system 200 is different with communication system 100 aspect provided for radio resources management RRM at least.In the communication system 100, RRM is influenced by RNC138 mainly.But in communication system 200, the RRM function is assigned to eNodeB300.
Like this, should recognize that the RRM coordinate scheme of communication system 200 is useful at least in both cases.The first, transmit the interference that causes in order to reduce by eNodeB230 adjacent or that close on, the second, switch to another the process from an eNodeB230 at AT120.
Joint radio resource management mechanism and minizone performance optimization mechanism when needing minimum signal to postpone when a kind of RRM coordinate scheme has defined distribution RRM function and among the LTE.The RRM coordinate scheme can make between the different RRM functions and coordinate, thereby carries out changeover program and interference coordination technique simultaneously in distributed RRM structure.
RRM decision in many sub-districts based on the switching and the interference coordination reconfiguration of load, is useful feature in UMTS LTE structure in for example switching.The RRM judgement of making based on many sub-districts can be beneficial to overall resource allocation and systematic function.However, when considering many sub-districts, it is useful avoiding potential RRM competition decision usually.The potential aspect of RRM competition spot will be in the RRM function be avoided by coordinating the RRM decision, and this is a purpose of the RRM coordinate scheme that proposed.
In one embodiment of the present of invention, the RRM coordinate scheme is determined the communication protocol between the RRM, radio resource elements and be used for the function of integrated management and be used for the decision function of joint radio resource management.The function that in the RRM coordinate scheme, defines will allow system bunch in synthetically carry out resource management, to avoid or to reduce competition decision between any RRM function at least in fact.The RRM coordinate scheme bunch in carry out the coordination of possible multi-operator RRM, and need not specify in the actual RRM algorithm that moves on each distributed node.
Agreement is set up in the communication that a function of RRM coordinate scheme is included as between RRM.Usually in the concentrated area in UMTS (as RNC), this concentrated area has the distributed subfunction (as the power management of the HSDPA in the base station) in the distributed node to RRM function in the hierarchical network structure.Communication between RRM is the One-to-one communication of the client-server between base station and RNC.Most of RRM function is arranged in RNC.However, because most of RRM function of imagining among the UMTS LTE is arranged in eNodeB230, so the communication between RRM can be to have the design of the distributed protocol of multiple ability.Communication protocol can be supported point-to-point, one-to-many and broadcast communication between the RRM among the UMTS LTE.
Point-to-point communication allows the communication between RRM, and it comprises the direct negotiation between two eNodeB230 in one bunch, and need not pass through centralized node (RRM server or RNC).The point-to-point communication ability will reduce processing delay and optimization system resource control on the whole.The typical example of point-to-point RRM communication is the switching between two eNodeB230.Between two eNodeB230, directly carry out RRM communication and will accelerate handoff procedure, and reduce potential mis-behave between transfer period.
The one-to-many communication capacity eNodeB230 can be carried out simultaneously and the RRM of a plurality of other nodes between consult.One-to-many RRM communication can be used to make the minimizing possibility of the relevant internodal competition decision of provided for radio resources management.The exemplary of one-to-many RRM communication is the resource allocation of user mobility.The initial trigger of handoff request will be referred to a plurality of eNodeB230 and ACGW238.Communication will allow service node eNodeB230 directly to be triggered to the handoff request that all relate to node simultaneously between one-to-many RRM.
Broadcast communications capability makes eNodeB230 other RRM function in simultaneously the reconfiguration parameters request being broadcast to bunch.For any change is set, broadcast-capable allow RRM be toggled to immediately bunch in the request of other RRM.The exemplary of the broadcast-capable between RRM in the communication protocol is, when a RRM detect exceptional condition or carried out alleviate the jamming program severe exacerbation time, reconfigure and alleviate jamming program.
Communication between RRM can be optimized needed entity by the specific radio electric resources.The RRM entity can be by pre-configured or ask between RRM as required, and needn't specify the definite RRM algorithm in each node.Radio resource entities can be frequency chunks, interference level, cell load, radio bearer, measured value etc.Radio resource entities is defined as assisting the RRM function, with the resource of managing itself and from the RI radio intelligence of other sub-district.
Determine that function is a kind of algorithm, thereby calculate value or the statistical value that is used to make radio resource configuration and control decision independently based on the RRM entity that is received.Determine that function can be independent of the RRM algorithm of RRM communication between supplier.Can stipulate to determine that function is to trigger radio resource reconfiguration or heavily to distribute.A general example determining function is the threshold function that is used to switch.Determine that function can stipulate with the threshold value of trigger switching, in handoff procedure, between eNodeB230, send described threshold value.
In case clearly determine communication protocol between RRM, radio resource entities and definite function then can be coordinated and the RRM function of each separate nodes of stand-alone development based on minizone RRM.This will optimize overall radio resource utilance.
The RRM coordinate scheme is beneficial to provide between the RRM that coordinates distributed RRM function and communicates by letter, thereby supports the interference mitigation technique in the LTE handoff procedure.The RRM function that is used for interference mitigation technique is positioned at eNodeB230, and need be with statistical, half statistical, or dynamical fashion is in the minizone of UMTSLTE coordinate radio resources, to alleviate the level of interference of Cell Edge User.Can reconfigure in the system loading dynamic change or under load unbalanced state and to alleviate interference.System loading can dynamically change when switching generation.It is also very sensitive for the dynamic change of cell edge load to alleviate interference.Handle interference mitigation technique the RRM function can with the RRM or the RRM server communication of other sub-district, so that the interference mitigation parameter is reshuffled, and needn't spell out RRM and interference coordination algorithm among the eNodeB230.Between transfer period, carry out the RRM be used for mobile management and changeover program control, its position between service and target BS central node or shake hands a little.Communication protocol, radio resource entities between defined RRM in the RRM coordinate scheme, determining that function makes can be mutual between the distributed RRM function, to carry out interference coordination algorithm and changeover program simultaneously.When changeover program took place and causes system loading unbalanced, the RRM coordinate scheme made the interference mitigation scheme to carry out, and redistributed in the minizone to trigger radio resource.
Generally, with reference to figure 2B, in response to determining the RRM incident has taken place, each eNodeB230 or ASGW238 can initiate directly to arrive the reconfiguration request of any node (or multinode).Each node that receives such reconfiguration request will utilize an expression permission or not allow such indication that reconfigures to respond.Like this, those skilled in the art can understand, use the one-to-many communication form can accelerate well to handle, and this is because all nodes that relate in the query configuration simultaneously almost.
Turn to Fig. 3 now, shown a flow chart, described the process that eNodeB230 experienced when the RRM incident took place in incident.In piece 300, eNodeB230 determines to have taken place the RRM incident and transfers control to decision block 305.At decision block 305, make and whether need maybe can carry out the decision of reshuffling.If not, then piece 300 is shifted back in control, and Program reset is waited for next RRM incident.Go through if reshuffle, then piece 310 is transferred in control, and eNodeB230 sends a reconfiguration request to suitable node.In piece 315, receiving node response reconfiguration request receives or the refusal request.In piece 320, make decision.If responsive node has received reconfiguration request, then reshuffle, and piece 300 and reset routine are shifted back in control.On the other hand, if at least one responsive node has been refused reconfiguration request, then can not reshuffle, piece 305 is shifted back in control, and whether reshuffling of any other type is suitable with decision.If then repeat this process by new reconfiguration request.If not, piece 300, Program reset are shifted back in control.
The typical case that the RRM incident takes place is considered that this is useful.Suppose that (as sub-district 2 and sub-district 3) moves to this sub-district from other adjacent sub-district owing to the user, 20% cell edge load is wished to increase in sub-district 1.The RRM that coordinates in the sub-district 1 triggers the heavy request for allocation of radio channel resource to sub-district 2 and sub-district 3, increases the load of cell edge 20%.So if possible, sub-district 2 and sub-district 3 respond, and indicate them will heavily distribute its radio channel resource, are used for the use of cell centre part, thereby allow sub-district 1 the more user of cell edge service.
It will be appreciated by those skilled in the art that the illustrational different system layer of different embodiment herein, program, perhaps module can be executable control unit.Controller can comprise microprocessor, microcontroller, digital signal processor, transaction card (comprising one or more microprocessors or controller), perhaps other control or computing equipment.The memory device that this discussion is mentioned can comprise one or more machine-readable storage mediums, is used to store data or instruction.Storage medium can comprise multi-form memory, comprise semiconductor storage, for example dynamically or static random-access memory (DRAM or SRAM), Erasable Programmable Read Only Memory EPROM (EPROM), Electrically Erasable Read Only Memory (EEPROM) and flash memory; Disk is as fixing, folding, removable dish; Other magnetizing mediums that comprises tape; The light medium is as CD (CD) or digital video disc (DVD).Form the different software layer in the different system, program, or the instruction of module can be stored in each storage facilities.When controller executed instruction, instruction impelled corresponding system to carry out the action of being programmed.
Above-mentioned disclosed specific embodiment only is schematically, and this is that this is conspicuous to the those skilled in the art that are benefited from the instruction of this paper owing to can change and realize the present invention in different but equivalent way.In addition, do not want construction or design details shown in this article is limited, but be described in the claim below.Therefore, the various piece of the method and system of method, system and description can realize in diverse location, as radio-cell, base station, base station controller and/or mobile switching centre.In addition, for realizing and adopting the required treatment circuit of described system can be implemented in specific integrated circuit, software-driven treatment circuit, firmware, programmable logic device, the hardware, benefit from the arrangement that one of ordinary skill in the art will appreciate that discrete component or said modules of present disclosure.Therefore it is evident that specific embodiment disclosed above can be changed or revise, and all these variations are considered to be in all in the scope and spirit of the present invention.Accordingly, proposed in the following claim this paper the protection range of request.
Claims (4)
1. method of coordinating distributed radio resource management comprises:
Detect the ongoing deterioration of implementing by a plurality of unit that alleviates jamming program by a unit with provided for radio resources management responsibility with provided for radio resources management responsibility;
In response to detecting deterioration, send reconfiguration request by described one unit with provided for radio resources management responsibility, described reconfiguration request indication is reshuffled the ongoing jamming program that alleviates,
Wherein said reconfiguration request be sent to be subjected in the ongoing a plurality of unit with provided for radio resources management responsibility that alleviate that reshuffling of jamming program influence at least each;
Have each permission in the unit of provided for radio resources management responsibility in response to receiving, carry out by described one unit with provided for radio resources management responsibility and alleviate reshuffling of jamming program ongoing from being reshuffled influence a plurality of; And
Have at least one refusal in the unit of provided for radio resources management responsibility in response to receiving, abandon alleviating reshuffling of jamming program ongoing by described one unit with provided for radio resources management responsibility from being reshuffled influence a plurality of.
2. the method for claim 1, wherein said a plurality of unit with provided for radio resources management responsibility are the base station.
3. the method for claim 1, wherein to reshuffled influence a plurality of have in the unit of provided for radio resources management responsibility each sends reconfiguration request and further comprises at least, send reconfiguration request with the One-to-one communication form.
4. the method for claim 1, wherein to reshuffled influence a plurality of have in the unit of provided for radio resources management responsibility each sends reconfiguration request and further comprises at least, send reconfiguration request with the one-to-many communication form.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/385,065 US20070032890A1 (en) | 2005-03-21 | 2006-03-21 | Method and apparatus for robust vibration suppression |
| US11/385,065 | 2006-03-21 | ||
| PCT/US2007/006060 WO2007108959A1 (en) | 2006-03-21 | 2007-03-09 | Method for coordinated control of radio resources in a distributed wirless system |
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| Publication Number | Publication Date |
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| CN101406095A CN101406095A (en) | 2009-04-08 |
| CN101406095B true CN101406095B (en) | 2011-09-21 |
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| CN2007800097132A Expired - Fee Related CN101406095B (en) | 2006-03-21 | 2007-03-09 | Coordination control method for radio resources in distributed wireless system |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1205604A (en) * | 1996-10-25 | 1999-01-20 | 诺基亚流动电话有限公司 | Method for radio resource control |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1205604A (en) * | 1996-10-25 | 1999-01-20 | 诺基亚流动电话有限公司 | Method for radio resource control |
Non-Patent Citations (1)
| Title |
|---|
| Lucent Technologies.Coordinated Radio Resource Management for LTE.《3GPP》.2006,全文. * |
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Correction item: Priority Correct: 11/386,065 2006.03.21 US False: 11/385,065 2006.03.21 US Number: 38 Volume: 27 |
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