CN101052216A - Method and system for realizing small area changing - Google Patents

Method and system for realizing small area changing Download PDF

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Publication number
CN101052216A
CN101052216A CNA200610082959XA CN200610082959A CN101052216A CN 101052216 A CN101052216 A CN 101052216A CN A200610082959X A CNA200610082959X A CN A200610082959XA CN 200610082959 A CN200610082959 A CN 200610082959A CN 101052216 A CN101052216 A CN 101052216A
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bandwidth
user terminal
sub
district
cell
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CN101052216B (en
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于映辉
陈燕燕
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN200610082959XA priority Critical patent/CN101052216B/en
Priority to PCT/CN2007/070151 priority patent/WO2008000184A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/10—Flow control between communication endpoints
    • H04W28/14—Flow control between communication endpoints using intermediate storage
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H04W28/20—Negotiating bandwidth
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point

Abstract

The method comprises: respectively determining the bandwidth information of user's terminal and the bandwidth information of cell, and according the bandwidth information of user's terminal and the bandwidth information of cell, setting the bandwidth influence parameters for the user's terminal, and adjusting the sequence of cell; selecting a cell. The invention can make the UE capable of selecting a suitable residence cell according to the bandwidth required by service.

Description

Realize the method and system of cell change
Technical field
The present invention relates to the cell change technical field, relating in particular to system bandwidth has multiple choices, and the fixing system of the bandwidth ability of UE for example in LTE (Long Term Evolution) system, considers the cell change treatment technology of bandwidth considerations.
Background technology
In wireless communication system; since the mobility that is in the portable terminal of idle condition make its through regular meeting in different moving between cells; like this; portable terminal can not be all the time with a fixing sub-district as its Serving cell, promptly in the process that the idle condition portable terminal moves, will be referred to the problem of sub-district gravity treatment.At present, described sub-district gravity treatment is meant that the user reselects the processing of the good neighbor cell of service quality as Serving cell according to the service quality of neighbor cell.In the prior art, the implementation of corresponding sub-district gravity treatment is as follows:
In the R6 stage of WCDMA (Wideband Code Division Multiple Access (WCDMA)), travelling carriage is measured when sorting when finishing in carrying out cell reselection process, mainly adopts the R criterion to judge from following two steps:
Step 1: travelling carriage is after the criterion specific according to certain (as the R criterion ranking criteria of UMTS) compares, and the signal of neighbor cell is better than the sub-district of travelling carriage current service;
Step 2: when the duration that the signal of neighbor cell is better than the sub-district of travelling carriage current service reaches or is higher than Treselection (sub-district gravity treatment timer duration), then will reselect this sub-district as Serving cell.In the prior art, if consider the situation of HCS (Hierarchical Cell Structure), can be expressed as the R criterion of measuring the ordering of carrying out the sub-district:
R s＝Q meas，s+Qhyst s+Qoffmbms； (1)
R n＝Q meas，n-Qoffset s，n+Qoffmbms-TO n*(1-L n)； (2)
Wherein,
In formula (1), R sBe the ranking value of Serving cell, Q Meas, sBe the measurement mass value of Serving cell, Qhyst sBe that the UE that is in connection status is in CELL_PCH, the lagged value of the sub-district gravity treatment that causes during the CELL_FACH state, this value issues by system broadcast message.
In formula (2), R nBe the ranking value of neighbor cell, and Q Meas, nBe the measured value of neighbor cell, Qoffset S, nBe the bias that carries out the sub-district gravity treatment between Serving cell and the neighbor cell, this value can be provided with and issue in system broadcast message voluntarily.
In formula (2), component TO nCan be expressed as:
TO n＝TEMP_OFFSET n*W(PENALTY_TIME n-T n)
L n＝0 if?HCS_PRIO n＝HCS_PRIO s
L n＝1 if?HCS_PRIO n＜＞HCS_PRIO s
W(x)＝0 for?x＜0
W(x)＝1 for?x＞＝0
Wherein, TEMP_OFFSET nAnd PENALTY_TIME nOnly be applied to the situation of indication use HCS in system message.
In formula (1) and (2), Qoffmbms is for being applied to MBMS PL (MultimediaBroadcast-multicast service Preferred frequency Layer, biasing factor during the first choice frequency layer of multimedia multileaving broadcast service) sub-district, promptly ought not consider MBMS (Multimedia Broadcast-multicast service, during multimedia multileaving broadcast service) situation, this biasing Qoffmbms can consider.
In the description formula of above-mentioned R criterion, when not using HCS situation following time, corresponding R criterion is described formula and just can be reduced to:
R s＝Q meas，s+Qhyst s； (3)
R n＝Q meas，n-Qoffset s，n； (4)
The formula of describing from above-mentioned formula (1) to formula (4) as can be seen, for Serving cell, in the R criterion, its ranking value R sBe its measured value Q Meas, sWith a lagged value Qhyst sSum.And for adjacent sub-district, its ranking value R nBe its measured value Q Meas, nWith a bias Qoffset S, nPoor.That is to say in the R criterion have value addedly for Serving cell, for neighbor cell the processing of depreciation is arranged, to embody the thought of preferred current service cell.
In sum, at the WCDMA system, no matter which kind of connection status UE is in, and when meeting the following conditions, UE can the new Serving cell of gravity treatment:
Described condition is: when new sub-district in a period of time Treselection, in about the ordering of sub-district gravity treatment, be better than current service cell always, then begin the sub-district gravity treatment.For the UE of connection status, if when CELL_PCH or URA_PCH state, adopt Treselection S, PCH(being in the Treselection under the PCH), if be in the FACH state, the time interval is adopted Treselection S, FACH(being in the Treselection under the FACH).
In addition, consider some other factor, whether as being co-frequency cell, whether UE is high-speed motion state etc., and UE also adopts scaling rule (scaling rule) to Treselection sOr Treseledion S, PCHOr Treselection S, FACHChange so that with corresponding factor to the influence of sub-district gravity treatment by on the convergent-divergent of Treselection, embodying.
Because in second generation cell mobile communication systems GSM (global system for mobile communications) and 3-G (Generation Three mobile communication system) WCDMA, the bandwidth of system and the bandwidth of UE are one to one.As in gsm system, the bandwidth when UE and gsm system are eated dishes without rice or wine all is 200KHz; And in the WCDMA system, the bandwidth when UE and WCDMA system eat dishes without rice or wine all is 5MHz, and the bandwidth of system is fixed, and therefore above-mentioned sub-district gravity treatment scheme can satisfy the demand of sub-district gravity treatment well.
But, along with the continuous growth of people to communication requirement, the peak rate of the WCDMA of the 2Mbit/s that the 3G system provides (Wideband Code Division Multiple Access (WCDMA) connected system) R99 transmission rate, 14.4Mbit/s R5 HSDPA (high speed downlink packet access technology) can not satisfy following demand far away, thereby the 3GPP of International Standards Organization (third generation partner program) proposition design LTE (Long Term Evolution) system, to guarantee that the 3GPP wireless access technology still has good competitiveness in the follow-up a very long time.In the LTE system, the peak rate of design is the message transmission rate of 100Mbit/s, and has good downward compatibility, to protect existing investment.
At present, in the LTE system, the lowest capability of UE is 10MHz, and the possible bandwidth of the UE of high ability is 20MHz, and the bandwidth of cell of network side then has multiple situations such as 1.25M, 2.5M, 5M, 10M and 20M.Obviously, in this LTE system,, then be easy to occur the unmatched situation of bandwidth of following two kinds of LTE system bandwidths and UE if still carry out the sub-district gravity treatment according to above-mentioned sub-district reselection criterion:
First kind of situation is: the UE of high ability resides in the low sub-district of system bandwidth, and the problem that may occur is like this, when UE wants to initiate high speed business, because system does not have enough big bandwidth, so can't support the high speed business that these UE initiate.At this situation, the solution that can adopt comprises: system or elder generation connect with default configuration, switch to proper cell then, and perhaps system directly allows the UE gravity treatment to proper cell.These two kinds of schemes all can be introduced extra processing or signaling consumption.
Second kind of situation is: the UE of low ability resides in the high sub-district of system bandwidth, the problem that may occur is like this, because each UE is the shared system resource, though the UE of low ability is to the not influence of shared resource of system, but for some public resources, the access of low ability UE can cause certain resource waste.For example, when the bandwidth UE access bandwidth that is 1.25M is the system of 20M, because the capabilities limits of UE, when UE inserts by RACH (Random Access Channel) at every turn, the service rate of initiating is not high, and if the UE of a 10M bandwidth is when inserting the system of same bandwidth, though the UE of this 10M bandwidth will take the resource of RACH equally, but the service rate that it is initiated may be higher, therefore, under the situation that takies RACH or other public resources equally, the business of two-forty can be brought bigger throughput of system, helps reasonable use system resource more like this.
Simultaneously, there is existing bandwidth problem in the cell reselection process scheme too in existing sub-district hand-off process scheme.
Therefore, existing sub-district gravity treatment or sub-district switching implementation can't satisfy sub-district gravity treatment or the sub-district switching demand in the LTE system well.
Summary of the invention
The purpose of this invention is to provide a kind of method and system that realize cell change, make in the system that can change bandwidth, the bandwidth of UE can be complementary with the bandwidth of the sub-district of selecting to determine, to guarantee rationally and effectively utilizing of Internet resources.
The objective of the invention is to be achieved through the following technical solutions:
The invention provides a kind of method that realizes cell change, comprising:
Determine the bandwidth information of user terminal and the bandwidth information of sub-district respectively, and be that user terminal carries out cell change and operates according to the matching degree of the bandwidth information of described user terminal and the bandwidth information of sub-district.
The bandwidth information of described definite user terminal comprises:
Determine the bandwidth of user terminal according to self the quality of service information of business of ability, historical bandwidth that user terminal uses and/or user terminal of bandwidth, user terminal of user terminal.
The bandwidth information of described definite sub-district comprises: determine bandwidth information according to the bandwidth of sub-district self and/or allocated bandwidth strategy and cell load in the sub-district.
Described cell change comprises:
The sub-district gravity treatment of user terminal under idle condition, and/or, the sub-district gravity treatment of user terminal under state of activation, and/or switch the sub-district of user terminal under state of activation.
Describedly, user terminal comprises for carrying out cell change operation:
User terminal according to processings of sorting of the matching degree of the bandwidth information of the bandwidth information of user terminal and sub-district, and selects the sub-district of the best to carry out resident according to ranking results to the neighbor cell measured and Serving cell;
Perhaps,
At network side the bandwidth of sub-district is divided into one group of sub-band, according to the matching degree of the bandwidth information of the bandwidth information of user terminal and described one group of sub-band, for a described sub-band of user terminal selecting correspondence as the subdistrict frequency band of selecting to insert.
Described ordering is handled and is comprised:
In carrying out the cell change operating process, the matching degree of the bandwidth information that quantizes described user terminal according to predetermined rule and ranking criteria and the bandwidth information of neighbor cell, obtaining corresponding bandwidth influence parameter, the bandwidth after the quantification is influenced parameter value be incorporated in the ranking criteria the processing of sorting of described Serving cell and neighbor cell.
Bandwidth behind described will the quantification influences parameter value and is incorporated in the ranking criteria and comprises:
Increase influences the amount of bias variable as the bandwidth that bandwidth influences parameter in the ranking value of neighbor cell, perhaps, multiply by the bandwidth that influences parameter as bandwidth on the former bias in the ranking value of neighbor cell influences parametric variable, perhaps utilizes this bandwidth to influence parameter and original bias in the ranking criteria is carried out implicit expression revises.
The described operation of carrying out cell change for user terminal comprises:
For the user terminal under the state of activation, be controlled to be user terminal by network side entity and carry out cell handover operations;
For the user terminal under idle condition or the state of activation, carry out the sub-district reselection operation by user terminal self control.
Described method also comprises:
Be in the user terminal selecting Serving cell process according to Serving cell and neighbor cell after the ordering, the bandwidth scale factor that utilization is determined based on the matching degree of the bandwidth information of user terminal and neighbor cell is adjusted corresponding select time.
The present invention also provides a kind of device of realizing cell change, comprising:
The bandwidth information acquiring unit is used for obtaining respectively and the bandwidth information of definite user terminal and the bandwidth information of sub-district;
Based on the cell change processing unit of bandwidth information, be used for matching degree according to the bandwidth information of the described user terminal that obtains and the bandwidth information of sub-district and be described user terminal and carry out cell change and operate.
Described bandwidth information acquiring unit is arranged in user terminal or the network side entity, and be used for determining the bandwidth of user terminal, and the bandwidth information of determining the sub-district according to the bandwidth of sub-district self and/or the allocated bandwidth strategy in the sub-district and cell load according to self the service quality of business of ability, historical bandwidth that user terminal uses and/or user terminal of bandwidth, user terminal of user terminal.
Described bandwidth information acquiring unit comprises historical business record unit and historical bandwidth determining unit, and/or, terminal unit contractual business record unit and signatory bandwidth determining unit, wherein:
Described historical business record unit is used to write down the business of once carrying out between interior user terminal of a period of time and the network;
Described historical bandwidth determining unit is used for determining the historical bandwidth that user terminal uses according to the information of described historical business record unit record;
Described terminal unit contractual business record unit is used for being recorded in terminal and the needed quality of service information of the signing service between the operator that terminal obtains from network side in registration process or business change process;
Described signatory bandwidth determining unit is used for determining according to the information of terminal unit contractual business record unit record the signatory bandwidth of user terminal.
Among the present invention, when comprising historical bandwidth determining unit and signatory bandwidth determining unit in the described bandwidth information acquiring unit, described device also comprises timer, in the time period that described timer is set, if terminal once initiated business, then the historical bandwidth information of determining according to historical bandwidth determining unit is as the bandwidth information of user terminal; Otherwise the signatory bandwidth information that signatory bandwidth determining unit is definite is as the bandwidth information of user terminal.
Described cell change processing unit based on bandwidth information comprises:
The matching degree quantifying unit be used for according to predetermined rule the matching degree of the bandwidth information of the bandwidth information of user terminal and sub-district being carried out quantification treatment, and the parameter information that the matching degree quantifying unit is quantized to obtain sends to the cell change operating unit;
The cell change operating unit obtains the matching degree parameter information after the described quantification, and this parameter information is included in the ranking criteria, is that user terminal is carried out the cell change operation.
Described cell change operating unit comprises: reselection operation unit, sub-district and/or cell handover operations unit, and,
When be used for to be under the idle condition or state of activation under user terminal when carrying out the sub-district gravity treatment, reselection operation unit, then described sub-district is arranged in the user terminal;
When being used for that the user terminal under the state of activation is carried out the sub-district when switching, then described cell handover operations unit is arranged in the network side entity.
Can find out by the technical scheme that the invention described above provides, the cell change scheme of the consideration bandwidth of cell factor that the present invention proposes, make UE can be according to business to the requirement change of bandwidth to suitable persistent district, better realize the high speed business that terminal may be initiated, reduce unnecessary sub-district gravity treatment or switching, also can make simultaneously UE before initiation business or business datum arrive, just choose bandwidth ratio, not only satisfy the bandwidth demand of UE but also the bandwidth resources that can not waste the sub-district than proper cell.And the bandwidth by coupling UE bandwidth ability and system reduces extra process and the signaling consumption that may introduce, perhaps improves the throughput of system.
Description of drawings
Fig. 1 is the specific implementation structural representation of device of the present invention.
Embodiment
Core concept of the present invention is: in the cell change process, embody the bandwidth influencing factor of system.Be specially: after determining the bandwidth usage of the bandwidth usage of UE and Target cell, UE sorts according to certain ranking criteria (as the R criterion among the UMTS (universal mobile telecommunications system) after considering bandwidth considerations etc.) to the sub-district of the neighbor cell measured and current service, and selects the best sub-district of ranking results to carry out resident.
For ease of the understanding of the present invention, to obtain ranking results down with the influence of in the R criterion of UMTS (universal mobile telecommunications system), introducing bandwidth considerations to current service cell and neighbor cell, and to carry out the sub-district gravity treatment be example, and specific implementation of the present invention is described; Corresponding sub-district handoff process and cell reselection process process are similar.
The matching degree of the present invention specifically can quantize described user terminal according to predetermined rule and the principle of ordering in the corresponding sequencing criterion in by the cell reselection rules sequencer procedure the bandwidth information and the bandwidth information of neighbor cell, obtain corresponding bandwidth and influence parameter, afterwards, the bandwidth after will quantizing again influences parameter value and is incorporated in the ranking criteria calculating formula described Serving cell and neighbor cell are carried out integrated ordered processing.For example, can adopt following three kinds of embodiments to realize, be respectively:
Embodiment one
Bandwidth of increase influences amount of bias in the gravity treatment ranking criteria influences parameter as bandwidth, or is called amount of bias Qoffset BandwidthEmbody the influence of bandwidth considerations in the gravity treatment of sub-district, so original UMTS does not use HCS and does not consider that the R criterion under the situation of MBMS just can be revised as:
R s＝Q meas，s+Qhyst s；
R n＝Q meas，n-Qoffset s，n+Qoffset bandwidth
Embody the influence of bandwidth considerations by the mode of amount of bias, promptly when neighbor cell is sorted, increase independent bandwidth factor of influence Qoffset Bandwidth, can be UE be dynamically arranged by operator voluntarily according to the actual conditions of network in the definition of its occurrence.
Embodiment two
Increase a bandwidth factor of influence in the gravity treatment ranking criteria, promptly bandwidth influence parametric variable and influences parameter as bandwidth, the bias that the update the system acquiescence defines, not the using HCS and do not consider that the R criterion under the situation of MBMS just can be revised as of UMTS like this:
R s＝Q meas，s+Qhyst s；
R n＝Q meas，n-F bw*Qoffset s，n；
Embody the influence of bandwidth considerations by the mode of bandwidth factor of influence, promptly when neighbor cell is sorted, at Qoffset S, nOn multiply by a bandwidth factor of influence F Bw, influence the ranking value of neighbor cell by the variation of this bandwidth factor of influence.F BwConcrete influence mode as follows:
When the bandwidth ability of UE and bandwidth of cell are complementary, F BwValue be 1;
When the bandwidth of the bandwidth ability of UE and sub-district does not match more, F BwValue big more;
F BwMinimum be 1, peak can be dynamically arranged by operator.
Provide bandwidth factor of influence F below BwOccurrence, promptly determine concrete F BwThe implementation of value:
Work as B UE≤ B Cell≤ a*B UEThe time, think that UE bandwidth ability and bandwidth of cell mate, the value of bandwidth factor of influence Fbw equals 1.Wherein a (a＞1) is a variable, and its value can be provided with according to network condition.
Work as B Cell＞a*B UEWhen (a＞1), think that the bandwidth of sub-district is too high, bandwidth factor of influence F BwValue greater than 1.When a value becomes big, mean that degree of not matching becomes big, bandwidth factor of influence F BwValue become big thereupon;
Work as B Cell＜b*B UEWhen (b＜1), think that the bandwidth of sub-district is low excessively, bandwidth factor of influence F BwValue greater than 1.When the b value diminishes, mean that degree of not matching increases bandwidth factor of influence F BwValue become big thereupon; Wherein b (b＜1) is a variable, and its value can be provided with according to network condition.
Embodiment three
In the select time of gravity treatment ranking criteria, increase bandwidth scale factor, revise select time.Be specially: in the consideration aspect the select time Tselection, increase bandwidth scale factor, the time that the signal that embodiment requires the sub-district of different bandwidth matching degree continues to be better than the cell-of-origin is different, and is more careful when making UE select bandwidth match and proper cell.
Promptly be by increasing bandwidth scale factor in embodiment three: " bandwidthdependent ScalingFactor ", come the time T selection that the sub-district is reselected to carry out the convergent-divergent processing.The embodiment of this influence is T Band selection=F Bw* T SelectionWherein, parameter F BwThe explanation face that sees before describe.
In above-mentioned three kinds of specific implementation execution modes, for embodiment one and two, its essence is the ordering of adjusting the neighbor cell in the cell reselection procedure, and embodiment three then is the opportunity of determining to reselect neighbor cell according to bandwidth considerations.So, the present invention can select any among embodiment one, two and three in the specific implementation process, perhaps, also can select the combination of embodiment one and embodiment three, perhaps, the combination of embodiment two and embodiment three.
And, similar with above-mentioned embodiment one and two, among the present invention, can also be directly at Qoffset S, nThe middle bandwidth of introducing influences parameter, even obtaining described Qoffset S, nProcess in consider that thereby corresponding bandwidth influence the parameter acquisition influences parameter based on bandwidth Qoffset S, nValue, afterwards, the Qoffset after ranking criteria uses renewal S, n, to obtain to influence the sub-district ordering of parameter based on band.
For the bandwidth influence value of realizing the consideration bandwidth influencing factor that above-mentioned three kinds of embodiments are definite is incorporated in the reselection operation of sub-district, the present invention specifically can be by adding the mode of a processing unit so that terminal is carried out the sub-district gravity treatment according to the corresponding bandwidth influence value in user terminal.
In above-mentioned embodiment two and embodiment three for bandwidth factor F BwAnd the selection of bandwidth scale factor " bandwidth dependent ScalingFactor " specifically is based on such hypothesis: the UE of high ability more likely initiates the business of two-forty, the more capable business support that high speed is provided of the system of high bandwidth.Yet, because in actual applications, UE can't initiate to reach the business of its bandwidth ability under a lot of situations, simultaneously because network need be supported the access of a lot of UE, so the business of the required two-forty of the UE that network also is difficult to provide the network system bandwidth to reach to single UE.Therefore, the present invention in specific implementation process, can also be at first to the calculating assessment of UE bandwidth and bandwidth of cell, afterwards, realize sub-district reselection operation according to described assessment result according to the embodiment that provides previously again based on bandwidth considerations.
At first, to the calculating assessment of UE bandwidth, determine that promptly the specific implementation of the bandwidth usage of UE has following several:
(1) judge the utilized bandwidth of UE according to the self-characteristic of UE, determine the utilized bandwidth of UE bandwidth value, need to consider following three kinds of influencing factors at UE:
(1) bandwidth of UE self
For example, in gsm system 200K, in the WCDMA system 5M, in the LTE system 10M.Because the mode difference of the modulation that UE supports in above-mentioned each system, so the flank speed of the business that UE self supports is also different, be that professional highest level that UE supports finally is the restriction of the hardware capabilities (being the bandwidth of UE self) that is subjected to mobile phone, therefore, need to consider the bandwidth value of UE self among the present invention.Among bandwidth the present invention of UE self with B InherentRepresent.
(2) ability of terminal
The ability of UE is meant and is satisfying under certain radio condition in R6, and UE is at the maximum rate of uplink and downlink.In LTE, continue to use similar definition.
Be different network wireless configurations, the ability of UE is different.This value is to leave UE and network side after UE finishes initial access respectively in.This value specifically can be used B CapabilityRepresent.
(3) the QoS service quality of UE institute supporting business
After the UE start and carrying out cell selecting, in resident current area, initiate registration process, obtain the CAMEL-Subscription-Information of UE, thereby understand the situation of the professional needed bandwidth of cell that UE contracted, by in UE, adding a record cell, the bandwidth of cell Bsub of the needed maximum of signing service of record UE, promptly the UE side keeps the setting of QoS.For uplink service, UE can filter out according to the setting of UE side reservation QoS and satisfy the packet that QoS is provided with, and these data are handled.In addition, UE also can keep from the setting of the specific QoS of network side acquisition, thereby to the business (especially guaranteeing the business of bit rate) that UE may initiate, can obtain the roughly bandwidth of service needed according to being provided with of QoS.This value can adopt Btraffic to represent.
The actual UE bandwidth of using need be taken all factors into consideration three top factor analyses acquisitions among the present invention, and concrete grammar is as follows:
UE reads B CapabilityAnd B TrafficValue, if these two values are effectively, then the value of the utilized bandwidth of UE is: B UE(the utilized bandwidth ability of UE)=max (B Capability, B Traffic), if B TrafficA plurality of effective values are arranged, then get maximum value and calculate; If B CapabilityAnd B TrafficValue invalid, then use the intrinsic bandwidth B of UE InherentAs the UE bandwidth.
(2) business of once carrying out according to UE is determined the UE bandwidth
UE selects the present persistent district of UE at the concrete behaviour in service in past of UE when carrying out the sub-district gravity treatment.That is, UE selects suitable persistent district according to the business of initiate/accepting in its past period to the demand of bandwidth of cell.
The specific implementation of said process is: add a timer and a record cell in UE, all professional employed bandwidth resources situations of coming UE in a certain section time T was initiated are carried out record.Record draws in time T the maximum Bmax of the bandwidth of the business that UE receives or initiated.That is, if in given time T, the professional required largest cell bandwidth value that UE initiated is Bmax, and then when carrying out the sub-district gravity treatment, UE preferentially selects bandwidth of cell to be greater than or equal to the sub-district of this value.
When UE is in various different situations, can selects above-mentioned (one) to determine the UE bandwidth, and then carry out the sub-district gravity treatment according to the UE bandwidth with two kinds of different embodiments in (two).For example, a kind of situation is: when UE can not initiate to reach its present persistent district bandwidth ability professional, promptly, the bandwidth of sub-district is very high, when but UE does not need so high bandwidth, can be by the definite Bmax value of the method described in the described mode (two) as the factor that influences the sub-district gravity treatment.
In addition, need to prove, when adopting the above-mentioned implementation that provides (two) to carry out the sub-district gravity treatment,, then can select following three kinds of modes to carry out the sub-district gravity treatment if UE did not initiate any business in preset time in the past:
(1) uses the required bandwidth B sub of the signing service of UE as the factor that influences the sub-district gravity treatment, promptly adopt the method described in above-mentioned ();
(2) ignore the bandwidth considerations of sub-district, select the best sub-district of signal as sub-district gravity treatment result;
(3) B of use UE CapabilityAs the factor that influences the sub-district gravity treatment.
Secondly, the calculating assessment for bandwidth of cell needs to consider following two kinds of influencing factors:
(1) self bandwidth of sub-district
Be 200K in gsm system promptly, be 5MHz in the WCDMA system and in the LTE system, be the multiple choices of 1.25MHz to 20MHz.Bandwidth of cell provides the maximum resource pond in the unit interval, is the hardware constraints of system unit time supporting business.
(2) effective bandwidth of sub-district
The effective bandwidth of sub-district is relevant with load with the allocated bandwidth strategy in the sub-district.
Strategy in the sub-district is the sub-district and might distribute whole bandwidth for each UE, but the bandwidth of distribution portion, as the system bandwidth sub-district that is 20MHz, but the bandwidth that cell allocation can insert for UE only is 10MHz, for system bandwidth half, the assigned portions bandwidth can be designated B C-part
The load of sub-district is the problem of a reality, if the load of a sub-district is very high, that may can't be the new any resource of UE distribution that inserts at all, even new UE can't insert at all.
The assessment of the actual bandwidth of cell of using is to consider two top factors and analyze and obtain among the present invention, and concrete grammar is as follows:
To know self bandwidth and these two information of effective bandwidth of sub-district for the UE of idle (free time), can learn by mode to system broadcasts.
If UE can obtain the bandwidth and the load condition of the sub-district of permission access by certain way, insert the assessment of bandwidth of cell so, i.e. B Cell(inserting the utilized bandwidth of sub-district)=spendable cell load.
If information on load is unknowable, B so Cell=B C-part
If distribute whole bandwidth of cell, the assessment that inserts bandwidth of cell so is exactly the whole bandwidth that insert sub-district self.
Through said process, at wireless communication system, UE can be known corresponding UE bandwidth and bandwidth of cell parameter, so, can utilize corresponding UE bandwidth and bandwidth of cell to determine amount of bias or bias in the corresponding sub-district gravity treatment sequencer procedure, and bandwidth scale factor, reselect operation thereby can control realization based on the sub-district of bandwidth considerations.
The mismatch problem of UE and bandwidth of cell does not exist only in the process of the sub-district gravity treatment of the UE under the idle condition, in the sub-district gravity treatment under state of activation, can have identical problem yet.In the sub-district reselection operation process under state of activation, the process of the sub-district gravity treatment of the UE under corresponding processing and the idle condition is basic identical, just because UE is a state of activation, so the service recorder of the historical bandwidth of UE also can be provided by network side.
In addition, specifically be that the sub-district reselection operation that is under idle condition or the state of activation with user terminal is the respective description that example is carried out specific implementation of the present invention in the description in front.The present invention is used for can also being applied to be in the cell handover operations of the user terminal under the state of activation to the sub-district reselection operation that is in the user terminal under idle condition or the state of activation except adaptation.
That is to say, under the sub-district switch instances under state of activation, also be need to consider the business demand of UE and switch after the problem of bandwidth match of Target cell.Concrete cell switch process is also basic identical with described cell reselection process process, just owing to switching fully by network control, so corresponding cell handover operations process is carried out by network side.
In order to solve the matching problem of UE and bandwidth of cell, the present invention also provides another kind of implementation, promptly the bandwidth of sub-district is divided into one group of sub-band at network side, according to the matching degree between the bandwidth information of the bandwidth information of user terminal and described one group of sub-band, for a described sub-band of user terminal selecting correspondence as the subdistrict frequency band of selecting to insert, thereby finish corresponding cell change operation.For example, can be divided into 10MHz to the system bandwidth of 20MHz, 5MHz, 2.5MHz, the frequency band that 1.25MHz etc. are different is to satisfy the access of different ability UE.This implementation can be directly in network controls.
The present invention also provides the implement device of a kind of sub-district gravity treatment, the specific implementation structure of described device as shown in Figure 1, device of the present invention can be arranged in the user terminal or network side, that is: when be used for to be under the idle condition or state of activation under user terminal when carrying out the sub-district gravity treatment, then this device is arranged in the user terminal; When being used for that the user terminal under the state of activation is carried out the sub-district when switching, then this device is arranged in the network side entity.As shown in Figure 1, described device specifically comprises following processing unit:
(1) bandwidth information acquiring unit is used for obtaining respectively and the bandwidth information of definite user terminal and the bandwidth information of sub-district;
Described bandwidth information acquiring unit specifically can be used for determining according to self the bandwidth of sub-district, signing service place of ability, historical bandwidth that user terminal uses and/or user terminal of bandwidth, user terminal of user terminal the bandwidth of user terminal, and the bandwidth information of determining neighbor cell according to the bandwidth of sub-district self and/or the allocated bandwidth strategy in the sub-district or cell load.
When needs utilized the historical bandwidth of described user terminal use to determine the bandwidth information of user terminal, described bandwidth information acquiring unit can comprise:
Historical business record unit is used to be recorded in the business of once carrying out between interior user terminal of a period of time in the past and the network;
Historical bandwidth determining unit is used for determining the historical bandwidth that user terminal uses according to the information of described historical business record unit record.
When needs utilized the historical bandwidth of described user terminal use to determine the bandwidth information of user terminal, described bandwidth information acquiring unit can also comprise:
Terminal unit contractual business record unit is used for being recorded in terminal and the needed quality of service information of the signing service between the operator that terminal obtains from network side in registration process or business change process;
Signatory bandwidth determining unit is used for determining according to the information of terminal unit contractual business record unit record the signatory bandwidth of user terminal.
Need to prove, when comprising historical bandwidth determining unit and signatory bandwidth determining unit in the described bandwidth information acquiring unit simultaneously, in the bandwidth information acquiring unit, also comprise corresponding timer, in the time period that described timer is set, if terminal once initiated business, then the historical bandwidth information that can determine according to historical bandwidth determining unit is as the bandwidth information of user terminal; If terminal had not been initiated any business in the timing section of timer, the signatory bandwidth information that the bandwidth determining unit of then will contracting is determined is as the bandwidth information of user terminal.
(2) based on the cell change processing unit of bandwidth information, the matching degree that is used for according to the bandwidth information of the bandwidth information of described user terminal and sub-district is that described user terminal carries out the cell change operation; Described cell change processing unit based on bandwidth information comprises:
The matching degree quantifying unit be used for according to predetermined rule the matching degree of the bandwidth information of the bandwidth information of user terminal and sub-district being carried out quantification treatment, and the parameter information that the matching degree quantifying unit is quantized to obtain sends to the cell change operating unit;
The cell change operating unit obtains the matching degree parameter information after the described quantification, and is that user terminal is carried out the cell change operation according to this parameter information in conjunction with ranking criteria;
Described cell change operating unit can in reselection operation unit, sub-district and the cell handover operations unit at least one, wherein:
When be used for to be under the idle condition or state of activation under user terminal when carrying out the sub-district gravity treatment, reselection operation unit, then described sub-district is arranged in the user terminal;
When being used for that the user terminal under the state of activation is carried out the sub-district when switching, then described cell handover operations unit is arranged in the network side entity.
In sum, the present invention is in the reselection criterion of sub-district, employing increases an amount of bias or increases a bandwidth factor of influence or implicit expression is revised original parameter or increase bandwidth scale factor in select time changes reselection criterion of the prior art in the gravity treatment ranking criteria, thereby the bandwidth change of the system of embodiment is to the influence of sub-district gravity treatment, simultaneously, in conjunction with the influencing factor in the practical application, reappraised UE bandwidth and bandwidth of cell.Make UE to arrive suitable persistent district to the demand gravity treatment of bandwidth according to business, the high speed business that better realization system may initiate, reduce unnecessary sub-district gravity treatment or switching, also can make simultaneously UE before initiation business or business datum arrive, just choose bandwidth ratio, not only satisfy the bandwidth demand of UE but also the bandwidth resources that can not waste the sub-district than proper cell.And the bandwidth by coupling UE bandwidth ability and system reduces extra process and the signaling consumption that may introduce, perhaps improves the throughput of system.And the present invention can also be applicable in the operation process of switching the sub-district, and can bring same beneficial effect.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.

Claims (15)

1, a kind of method that realizes cell change is characterized in that, comprising:
Determine the bandwidth information of user terminal and the bandwidth information of sub-district respectively, and be that user terminal carries out cell change and operates according to the matching degree of the bandwidth information of described user terminal and the bandwidth information of sub-district.
2, method according to claim 1 is characterized in that, the bandwidth information of described definite user terminal comprises:
Determine the bandwidth of user terminal according to self the quality of service information of business of ability, historical bandwidth that user terminal uses and/or user terminal of bandwidth, user terminal of user terminal.
3, method according to claim 1 is characterized in that, the bandwidth information of described definite sub-district comprises:
Determine bandwidth information according to the bandwidth of sub-district self and/or allocated bandwidth strategy and cell load in the sub-district.
4, method according to claim 1 is characterized in that, described cell change comprises:
The sub-district gravity treatment of user terminal under idle condition, and/or, the sub-district gravity treatment of user terminal under state of activation, and/or switch the sub-district of user terminal under state of activation.
5, according to each described method of claim 1 to 4, it is characterized in that, describedly comprise for user terminal carries out cell change operation:
According to processings of sorting of the matching degree of the bandwidth information of the bandwidth information of user terminal and sub-district, and select the sub-district of the best to carry out resident to the neighbor cell measured and Serving cell according to ranking results;
Perhaps,
At network side the bandwidth of sub-district is divided into one group of sub-band, according to the matching degree between the bandwidth information of the bandwidth information of user terminal and described one group of sub-band, for a described sub-band of user terminal selecting correspondence as the subdistrict frequency band of selecting to insert.
6, method according to claim 5 is characterized in that, described ordering is handled and comprised:
In carrying out the cell change operating process, the matching degree of the bandwidth information that quantizes described user terminal according to predetermined rule and ranking criteria and the bandwidth information of neighbor cell, obtaining corresponding bandwidth influence parameter, the bandwidth after the quantification is influenced parameter value be incorporated in the ranking criteria the processing of sorting of described Serving cell and neighbor cell.
7, method according to claim 6 is characterized in that, the bandwidth behind described will the quantification influences parameter value and is incorporated in the ranking criteria and comprises:
Increase influences the amount of bias variable as the bandwidth that bandwidth influences parameter in the ranking value of neighbor cell, perhaps, multiply by the bandwidth that influences parameter as bandwidth on the former bias in the ranking value of neighbor cell and influence parametric variable, perhaps, utilize this bandwidth to influence parameter original bias in the ranking criteria is carried out the implicit expression modification.
According to each described method of claim 1 to 4, it is characterized in that 8, the described operation of carrying out cell change for user terminal comprises:
For the user terminal under the state of activation, be controlled to be user terminal by network side entity and carry out cell handover operations;
For the user terminal under idle condition or the state of activation, carry out the sub-district reselection operation by user terminal self control.
9, according to each described method of claim 1 to 4, it is characterized in that described method also comprises:
Be in the user terminal selecting Serving cell process according to Serving cell and neighbor cell after the ordering, the bandwidth scale factor that utilization is determined based on the matching degree of the bandwidth information of user terminal and neighbor cell is adjusted corresponding select time.
10, a kind of device of realizing cell change is characterized in that, comprising:
The bandwidth information acquiring unit is used for obtaining respectively and the bandwidth information of definite user terminal and the bandwidth information of sub-district;
Based on the cell change processing unit of bandwidth information, be used for matching degree according to the bandwidth information of the described user terminal that obtains and the bandwidth information of sub-district and be described user terminal and carry out cell change and operate.
11, device according to claim 10, it is characterized in that, described bandwidth information acquiring unit is arranged in user terminal or the network side entity, and be used for determining the bandwidth of user terminal, and the bandwidth information of determining the sub-district according to the bandwidth of sub-district self and/or the allocated bandwidth strategy in the sub-district and cell load according to self the service quality of business of ability, historical bandwidth that user terminal uses and/or user terminal of bandwidth, user terminal of user terminal.
12, device according to claim 11 is characterized in that, described bandwidth information acquiring unit comprises historical business record unit and historical bandwidth determining unit, and/or, terminal unit contractual business record unit and signatory bandwidth determining unit, wherein:
Described historical business record unit is used to write down the business of once carrying out between interior user terminal of a period of time and the network;
Described historical bandwidth determining unit is used for determining the historical bandwidth that user terminal uses according to the information of described historical business record unit record;
Described terminal unit contractual business record unit is used for being recorded in terminal and the needed quality of service information of the signing service between the operator that terminal obtains from network side in registration process or business change process;
Described signatory bandwidth determining unit is used for determining according to the information of terminal unit contractual business record unit record the signatory bandwidth of user terminal.
13, device according to claim 12, it is characterized in that, when comprising historical bandwidth determining unit and signatory bandwidth determining unit in the described bandwidth information acquiring unit, described device also comprises timer, in the time period that described timer is set, if terminal once initiated business, then the historical bandwidth information of determining according to historical bandwidth determining unit is as the bandwidth information of user terminal; Otherwise the signatory bandwidth information that signatory bandwidth determining unit is definite is as the bandwidth information of user terminal.
14, device according to claim 10 is characterized in that, described cell change processing unit based on bandwidth information comprises:
The matching degree quantifying unit be used for according to predetermined rule the matching degree of the bandwidth information of the bandwidth information of user terminal and sub-district being carried out quantification treatment, and the parameter information that the matching degree quantifying unit is quantized to obtain sends to the cell change operating unit;
The cell change operating unit obtains the matching degree parameter information after the described quantification, and this parameter information is included in the ranking criteria, is that user terminal is carried out the cell change operation.
According to each described device of claim 10 to 14, it is characterized in that 15, described cell change operating unit comprises: reselection operation unit, sub-district and/or cell handover operations unit, and,
When be used for to be under the idle condition or state of activation under user terminal when carrying out the sub-district gravity treatment, reselection operation unit, then described sub-district is arranged in the user terminal;
When being used for that the user terminal under the state of activation is carried out the sub-district when switching, then described cell handover operations unit is arranged in the network side entity.
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