CN1889719A - Cell ability judging method, system and radio network controller - Google Patents
Cell ability judging method, system and radio network controller Download PDFInfo
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- CN1889719A CN1889719A CNA2006101037723A CN200610103772A CN1889719A CN 1889719 A CN1889719 A CN 1889719A CN A2006101037723 A CNA2006101037723 A CN A2006101037723A CN 200610103772 A CN200610103772 A CN 200610103772A CN 1889719 A CN1889719 A CN 1889719A
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Abstract
A method for measuring ability of cell includes calculating minimum spread spectrum factor and number of corresponding code character supported by local cell by seeking idle code character of said factor at current code tree and counting up number of it according to ability credit of local cell and consumption rule of said factor; carrying out radio load assignment calculation according to spread spectrum factor and number of corresponding code character of current cell after minimum spread spectrum factor and number of corresponding code character is obtained according to current code tree, minimum spread spectrum factor of local cell and number of corresponding code character.
Description
Technical field
The present invention relates to a kind of cell ability judging method, system and radio network controller, particularly a kind of method, system and radio network controller of in the RRM of mobile communication, weighing the sub-district credit facility by spreading factor.
Background technology
WCDMA (Wide-band Code Division Multiple Access; WCDMA access system) is a kind of code division multiple access system, the sub-district down channel relies on the down channel sign indicating number to distinguish in this system, need to keep quadrature between this channel code that just requires different channels to use, and in the quadrature that guarantees interchannel, in order to satisfy the different business of different service quality requirement, also need to provide variable-data-rate.So that the channel code in the system adopts is OVSF (Orthogonal Variable Spreading Factor, orthogonal variable frequency extension factor code), they guarantee the orthogonality between the different physical channels, and because their spreading factor is variable, so applicable to the different pieces of information rate requirement.
WCDMA is a sign indicating number subsystem, and promptly different user devices (UE) can be distinguished (frequency is identical) by using different channel codes, and general channel code can use C
SF, NoBe described, represent that this channel uses " spreading factor " SF to carry out spread spectrum (be that SF Chip represents a data symbol, SF can be understood as the spread spectrum multiplying power), the channel code of spreading factor can have a plurality of, for these sign indicating numbers are distinguished, can be numbered these channel codes, at C
SF, NoIn SF be spreading factor, can only be 4,8,16,32,64,128,256,512 these several (powers of 2), No be " sign indicating number number ", " sign indicating number number " is not isolated the existence, must be under certain SF ability meaningful, span is 0,1 ..., SF-1.
Herein, " code word " sign be " channel code ", " sign indicating number number " is meant under this SF, the numbering of channel code correspondence, " code word number " is actually the number of " channel code ".
As code word C
81Referring to spreading factor is 8, is numbered 1 channel code, and the sign indicating number of this code word correspondence number is 1.
It should be noted that: C
81, C
82..., C
512 511Be defined in 3GPP (3rd GenerationPartnership Project etc. code word; 3G (Third Generation) Moblie standardization body) defines on the agreement.
Orthogonal spectrum expansion factor sign indicating number is a kind of precious resources among the WCDMA, and wherein spreading factor has reflected the traffic data rate that current area is supported to a certain extent.Orthogonal variable frequency extension factor code can be represented with the code tree of Fig. 1.Fig. 1 is the orthogonal variable spread-spectrum factor code tree schematic diagram, as shown in the figure, in code tree, the sign indicating number that spreading factor SF is identical is a quadrature, father's sign indicating number and subcode are non-orthogonal, the fraternal each other code word of code word with identical father node, so two conditions below assignable sign indicating number (perhaps being referred to as bell idles) should satisfy simultaneously in code tree:
1, is in the subtree of root node with this yard, do not have sign indicating number occupied;
2, it is occupied that the path from this yard to the code tree root node does not have sign indicating number.
Below with C
64,4Be example, the implication of above-mentioned condition be described:
1 the implication of satisfying condition is: with C
64,4In the subtree for root node, all sign indicating numbers all should be not occupied, and promptly subcode, grandson's sign indicating number, great-grandson's subcode all should be not occupied, and these sign indicating numbers comprise: C
128,8, C
128,9, C
256,16, C
256,17, C
256,18, C
256,19
2 the implication of satisfying condition is: C
64,4To code tree root node C
1,0The path on, father's sign indicating number, grandfather's sign indicating number ..., all should be not occupied, these the sign indicating number comprise: C
32,2, C
16,1, C
8,0, C
4,0, C
2,0, C
1,0
For NodeB, each calling all can take a part of NodeB disposal ability, and user's spreading factor NodeB disposal ability more little, that then take is many more.Because NodeB chip disposal ability is limited, therefore, RNC (Radio Network Controller; Radio network controller) must the number of users that insert the sub-district be limited to some extent.For this reason, 3GPP is at NBAP (Node B Application Part; Node B application part) introduced the notion of ability credit rating and consumption rule in the protocol message, its basic thought is:
1, the disposal ability to NodeB quantizes, and is 100 as the ability credit rating of home cell, and quantized result is reported RNC.
The ability credit rating size that 2, each spreading factor need be consumed is offered RNC with consumption rule in form.As: suppose that a spreading factor is that to consume 2, one spreading factors of ability credit rating be that 8 the professional ability credit rating that consumes of 384K PS is 12 for 128 AMR voice user.
3, RNC is when Resources allocation, user of every access, just calculate the ability credit number of degrees that needs take, look at whether the remaining ability credit rating of home cell (home cell ability credit rating-inserted total ability credit number of degrees of CU) is enough according to this user's spreading factor size.
If not enough, illustrate that the NodeB disposal ability has consumed almost, there is not ability to handle this user again, RNC should refuse this user's resource bid;
If enough, illustrate that NodeB has the ability to handle this user, RNC can receive this user's resource bid;
In Node B ability credit rating and the corresponding consumption rule of each spreading factor by the home cell of resource status indication (RESOURCE STATUS INDICATION) and audit response (AUDIT RESPONSE) information reporting sub-district, sub-district correspondence, and the ability credit rating and the corresponding consumption rule of each spreading factor of the home cell group under the sub-district.According to home cell and the remaining ability credit rating of home cell group and its corresponding consumption rule, can calculate the minimal frequency spreading factor that current area can be supported, this result can fully reflect the ability of current Node B home cell and cell set.
Wherein, home cell, home cell group are the notions of 3GPP protocol definition.
In fact the spreading factor of code tree, home cell, home cell group and code word have embodied three kinds of resources of system.
1) code tree management is whole code words, and according to the description of front, a code word can be distinguished a channel, so code tree embodies is that how many resources are air wireless interface utilized, also remaining how many resources.
2) home cell: because NodeB is when handling each UE, all need to consume the chip disposal ability and carry out the modulation of wireless signal, demodulation, the speed that UE transmits data high more (the code word SF that this moment, this cellphone subscriber needed is also more little) needs the chip disposal ability of consumption many more.Because it is limited that NodeB distributes to each sub-district disposal ability, therefore protocol definition " total credit rating " ability of supporting of home cell--can be understood as disposal ability, be assumed to be 100, every kind of professional ability that consumes (can be understood as: SF-consumes the price list of ability), ability as speech business (SF is 128)/consumption is 2, the ability of 384K PS (SF is 8)/consumption is 16, according to this total capacity and price list, can instead converse this home cell and support the speech business user of what SF=128, the flank speed of supporting (as surplus capacity is 12, then obviously can not support 384K PS).
In a word, " spreading factor of home cell and code word " reflected the data movement capacity of this NodeB sub-district (being the disposal ability of NodeB in fact).
3) home cell group: similar with home cell, only, what home cell group ability defined is the disposal abilities that a plurality of home cells are shared.
" spreading factor of home cell group and code word " reflected the data movement capacity (being the disposal ability of NodeB in fact) that many home cells of this NodeB are shared.
Core net can provide this professional Qos (Quality of Service in message when sending " RAB assignment request " message to radio network controller; Service quality) quality requirement.Generally, the Qos parameter can provide two parts information, and desired qualities requires, minimum quality requirement.
At " RAB (RAB; Radio Access Bear) assignment request " canonical form that provides multiple quality requirement in the message has multiple:
1) can provide " expectation Qos mass parameter " in " RAB assignment request " message, (optional) " replacement mass parameter ", purpose is when wishing that Internet resources are relatively more sufficient, according to " expectation Qos mass parameter " allocation of network resources, when Internet resources are relatively more nervous, can select the service quality degradation is carried out Resource Allocation in Networks according to " replacement mass parameter ".
2) do not comprise " replacement mass parameter " in " RAB assignment request " message, but in expectation Qos mass parameter, comprise two kinds of rate request of " maximum rate " and " assurance speed " (---minimum speed limit require), radio network controller can according to Internet resources whether abundance is a user resource allocation.
3) do not comprise " replacement mass parameter " in " RAB assignment request " message, in expectation Qos mass parameter, only comprise " maximum rate " rate request, radio network controller can according to Internet resources whether abundance is a user resource allocation, when resource is nervous, even can be regardless of configuration or distribution resource (speed that unsecured rate requirement, network provide can be 0) seldom.
At present, when radio network controller is received from " RAB assignment request " message of core net, usually just merely with the initial access rate of the maximum rate in the request message as this business.And calculate the spreading factor of needs according to this initial access rate, and then application distributes this spreading factor, home cell and home cell group ability credit rating to the sub-district, the application failure is then refused this calling or is carried out the directed retry operation.
The weak point of this processing mode is: radio network controller is only paid close attention to the maximum rate request in " RAB assignment request " message, does not consider sub-district residue code tree ability and NodeB home cell and home cell group ability.Make and when initial service is set up, apply for according to the maximum resource needs amount at the very start, do not consider the practical capacity of Internet resources, thereby be easy to cause the professional failure of setting up, reduced the service provision capacity of network.
Summary of the invention
The invention provides a kind of cell ability judging method, system and radio network controller, exist radio network controller only to pay close attention to maximum rate request in " RAB assignment request " message in the prior art in order to solve, do not consider the practical capacity of Internet resources, cause the professional failure easily of setting up, reduced the problem of the service provision capacity of network.
A kind of cell ability judging method of the present invention comprises the steps:
Minimal frequency spreading factor and corresponding code word number that the inquiry current area is supported;
Spreading factor and corresponding code word number according to current area are carried out radio bearers assignment calculating.
Preferably, minimal frequency spreading factor and corresponding code word number that described inquiry current area is supported comprise the steps:
On current code tree, search the idle code word of minimal frequency spreading factor and add up the idle code word number of minimal frequency spreading factor correspondence, and/or
Consumption rule according to home cell ability credit rating and each spreading factor calculates minimal frequency spreading factor and the corresponding code word number that home cell is supported, and/or
Consumption rule according to home cell group ability credit rating and each spreading factor calculates minimal frequency spreading factor and the corresponding code word number that the home cell group is supported;
According to described current code tree and/or the minimal frequency spreading factor of described home cell and/or described home cell group, corresponding code word number, draw minimal frequency spreading factor and corresponding code word number that current area is supported.
Preferably, the described idle code word number of searching the idle code word of minimal frequency spreading factor and adding up the minimal frequency spreading factor correspondence on current code tree comprises the steps:
According to spreading factor order traversal sub-district code tree from small to large;
Traversal sign indicating number number in 0 to n scope yard until finding bell idles, described n is that spreading factor subtracts 1;
With the spreading factor of this bell idles as minimal frequency spreading factor;
Idle code word number is increased progressively the 1 idle code word number as the minimal frequency spreading factor correspondence.
Preferably, described consumption rule according to home cell ability credit rating and each spreading factor calculates minimal frequency spreading factor and the corresponding code word number that home cell is supported, comprises the steps:
According to spreading factor order traversal home cell from small to large;
When the remaining ability credit rating of home cell during, write down current spreading factor and support minimal frequency spreading factor and the corresponding code word number that the code word number of current spreading factor is supported as home cell divided by the consumption method of current spreading factor＞1.0.
Preferably, the consumption rule of described home cell ability credit rating and each spreading factor is that Node B reports.
Preferably, described consumption rule according to home cell group ability credit rating and each spreading factor calculates minimal frequency spreading factor and the corresponding code word number that the home cell group is supported, may further comprise the steps:
According to spreading factor order traversal home cell group from small to large;
When the remaining ability credit rating of home cell group during, write down current spreading factor and support minimal frequency spreading factor and the corresponding code word number that the code word number of current spreading factor is supported as the home cell group divided by the consumption method of current spreading factor＞1.0.
Preferably, the consumption rule of described home cell group ability credit rating and each spreading factor is that Node B reports.
Preferably, describedly drawing minimal frequency spreading factor and the corresponding code word number that current area is supported, is to be the code word number of this spreading factor correspondence of supporting of current area as the minimal frequency spreading factor of current area support, described code word number reckling with the maximum in the described minimal frequency spreading factor that draws.
The present invention also provides a kind of cell ability judging system, comprises radio network controller, also comprises the query unit that links to each other with radio network controller, is used to inquire about minimal frequency spreading factor and the corresponding code word number that current area is supported;
Described radio network controller carries out radio bearers assignment calculating according to the spreading factor and the corresponding code word number of current area.
Preferably, described query unit comprises first statistical module and second statistical module and/or the 3rd statistical module and/or the 4th statistical module, wherein:
Second statistical module is searched the idle code word of minimal frequency spreading factor and is added up the idle code word number of minimal frequency spreading factor correspondence on current code tree;
The 3rd statistical module calculates the minimal frequency spreading factor and the corresponding code word number of home cell support according to the consumption rule of home cell ability credit rating and each spreading factor;
The 4th statistical module calculates the minimal frequency spreading factor and the corresponding code word number of the support of home cell group according to the consumption rule of home cell group ability credit rating and each spreading factor;
First statistical module, minimal frequency spreading factor, corresponding code word number according to the described home cell group of the described home cell of the described current code tree of described second statistical module counts and/or described the 3rd statistical module counts and/or described the 4th statistical module counts draw minimal frequency spreading factor and corresponding code word number that current area is supported;
Described radio network controller carries out radio bearers assignment calculating according to the spreading factor and the corresponding code word number of the described current area of described first statistical module counts.
Preferably, described query unit is in described radio network controller, or outside described radio network controller.
The present invention provides a kind of radio network controller again, comprises query unit, is used to inquire about minimal frequency spreading factor and the corresponding code word number that current area is supported;
Described radio network controller carries out radio bearers assignment calculating according to the spreading factor and the corresponding code word number of current area.
Preferably, described query unit comprises first statistical module and second statistical module and/or the 3rd statistical module and/or the 4th statistical module, wherein:
Second statistical module is searched the idle code word of minimal frequency spreading factor and is added up the idle code word number of minimal frequency spreading factor correspondence on current code tree;
The 3rd statistical module calculates the minimal frequency spreading factor and the corresponding code word number of home cell support according to the consumption rule of home cell ability credit rating and each spreading factor;
The 4th statistical module calculates the minimal frequency spreading factor and the corresponding code word number of the support of home cell group according to the consumption rule of home cell group ability credit rating and each spreading factor;
First statistical module, minimal frequency spreading factor, corresponding code word number according to the described home cell group of the described home cell of the described current code tree of described second statistical module counts and/or described the 3rd statistical module counts and/or described the 4th statistical module counts draw minimal frequency spreading factor and corresponding code word number that current area is supported;
Described radio network controller carries out radio bearers assignment calculating according to the spreading factor and the corresponding code word number of the described current area of described first statistical module counts.
Beneficial effect of the present invention is as follows:
Because in the present invention, proposed to weigh the ability of sub-district, considered that in the radio bearer assignment process minimal frequency spreading factor of current area support improves call completing rate by spreading factor.By real-time monitor cell code tree take, home cell and home cell group ability credit rating distribution condition, calculate the minimal frequency spreading factor that current area is supported, be allocated successfully probability thereby reach the raising local resource, and then avoid dividing the situation of timing failure at local resource.Use invention in the WCDMA mobile communication system, improved the code tree allocation success rate, and home cell and home cell group ability credit rating be distributed into power, improved call completing rate, also shortened turn-on time.
Description of drawings
Fig. 1 is an orthogonal variable spread-spectrum factor code tree schematic diagram described in the background technology;
Fig. 2 is the implementing procedure schematic diagram of cell ability judging method described in the embodiment;
Fig. 3 is the structural representation of cell ability judging system described in the embodiment;
Fig. 4 is the structural representation of radio network controller described in the embodiment.
Embodiment
The minimal frequency spreading factor that the calculation plot in the WCDMA mobile communication system that is proposed among the present invention is supported, be by real-time monitor cell code tree take, home cell and home cell ability credit rating distribution condition, calculate the minimal frequency spreading factor that current area is supported, thereby reach the raising local resource and be allocated successfully probability, and then avoid dividing the situation of timing failure at local resource, can improve the power that is distributed into of code tree allocation success rate and home cell and home cell group ability credit rating, improve call completing rate.
Based on above-mentioned design, the invention provides method, system and the radio network controller of cell ability judging, below in conjunction with accompanying drawing the specific embodiment of the present invention is described.
Fig. 2 is the implementing procedure schematic diagram of cell ability judging method of the present invention, and as shown in the figure, the key step of implementation method is as follows:
Step 201: on current code tree, search idle code word of minimal frequency spreading factor and statistics.
Step 202: calculate minimal frequency spreading factor and corresponding code word number that home cell is supported.
Step 203: calculate minimal frequency spreading factor and corresponding code word number that the home cell group is supported.
Step 204: calculate minimal frequency spreading factor and corresponding code word number that current area is supported.
Step 205: consider the current area ability when spreading factor is calculated in the radio bearers assignment.
In the said method, the code word on the described code tree is divided into two classes: idle, take, idle this code word of expression also is not used, and takies this code word of expression and is used (can be used indirectly) by UE (subscriber equipment) or common signal channel.Searching the overhead not busy code word of code tree in fact is meant and searches remaining sign indicating number resource capability.
Code tree, home cell, the unification of home cell group surplus capacity are expressed with following form: minimal frequency spreading factor+corresponding code word number.
Such as: minimal frequency spreading factor is 6 for the 8+ code word number, represents that this sub-district can also insert the professional or 2M PS business (this UE occupies 6 code words simultaneously, and speed is that 6 * 384K is about 2M) of 6 384KPS.
If minimal frequency spreading factor is 2 for the 128+ code word number, represent that this sub-district can also insert 2 12.2K speech businesses.
Below we are elaborated in the concrete enforcement to each step, concrete enforcement wherein can be with following mode but is not limited in following mode and realizes.
1, in step 201, on the code tree of sub-district, searches idle code word of minimal frequency spreading factor and statistics.
Radio network controller travels through the sub-district code tree, searches the idle code word number of current unappropriated minimal frequency spreading factor and this spreading factor correspondence.The method of searching and adding up is as follows:
Idle code word number is initialized as 0
FOR SF=4 TO SF=512 STEP SF*2//according to spreading factor from small to large (4,8,16 ... .) order traversal
FOR k=0 TO k=SF-1 STEP k=k+1//sign indicating number k travels through from 0 to SF-1
IF (C
SF, k is a bell idles)
SF is idle minimal frequency spreading factor;
Idle code word number increases progressively 1;
END?IF
END?FOR
IF (if having found the sign indicating number of a free time)
BREAK; // found minimum idle SF, need not to continue to search, withdraw from
END?IF
END?FOR
2, calculate minimal frequency spreading factor and the corresponding code word number that home cell is supported in step 202, be the home cell ability credit rating that reports according to Node B and the consumption rule of each spreading factor, minimal frequency spreading factor and corresponding code word number that the home cell of calculation plot correspondence is supported.Computational methods can realize with following mode:
FOR SF=4 TO SF=512 STEP SF*2//according to spreading factor from small to large (4,8,16 ... .) order traversal
What these spreading factors are IF ((consumption rule of the remaining ability credit rating of home cell/current spreading factor)＞1.0) // surplus capacity can support
Write down current spreading factor;
The code word number of current spreading factor supported in record;
BREAK
END?IF
END?FOR
3, calculate in the minimal frequency spreading factor and corresponding code word number of home cell group support in step 203, if the home cell of sub-district correspondence belongs to the home cell group, the home cell group ability credit rating that reports according to Node B and the consumption rule of each spreading factor calculate minimal frequency spreading factor and corresponding code word number that the home cell group is supported.Home cell ability credit rating is the ability of some sub-districts, and the home cell group is meant the ability that can share between one group of home cell.The calculating home cell is the same with the minimal frequency spreading factor and the corresponding code word number of the support of home cell group, and definition, the thought of the ability credit rating of home cell and home cell group also are consistent.Computational methods can realize with following mode:
FOR SF=4 TO SF=512 STEP SF*2//according to spreading factor from small to large (4,8,16 ... .) order traversal
IF ((consumption rule of the remaining ability credit rating of home cell group/current spreading factor)＞1.0)
Write down current spreading factor;
The code word number of current spreading factor supported in record;
BREAK；
END?IF
END?FOR
4, calculating in the minimal frequency spreading factor and corresponding code word number of current area support in step 204, is to calculate the minimal frequency spreading factor that current area is supported: the maximum of getting among step 201,202,203 results is the minimal frequency spreading factor that current area is supported.The code word number of calculating this spreading factor correspondence is then got the code word number that reckling among step 201,202,203 results is this spreading factor correspondence of supporting of current area.
5, when step 205 radio network controller judges whether to satisfy request user's resource request according to the current area ability, can realize with following two steps:
1) according to Qos quality requirements such as the peak transfer rate in the request message, assurance speed, determine spreading factor size and code word number that this user needs, guarantee that wherein speed is that optionally because some type of service has provided assurance speed, but some type of service does not then require assurance speed;
2) whether the cell ability that calculates of determining step 204 can satisfy request user's sign indicating number resource requirement, if satisfy, illustrates that cell ability is enough, can support this user's request, otherwise, the cell ability deficiency, this user's request can not be supported, other operations such as directed retry can be carried out.
Below in conjunction with accompanying drawing the concrete enforcement of cell ability judging of the present invention system is made an explanation.
Fig. 3 is the structural representation of cell ability judging of the present invention system, as shown in the figure, the query unit 30 that radio network controller 31 is arranged in the system, links to each other with radio network controller 31, query unit 30 are used to inquire about minimal frequency spreading factor and the corresponding code word number that current area is supported; 31 spreading factor and corresponding code word number according to current area of radio network controller are carried out radio bearers assignment calculating.In concrete the enforcement, query unit 30 can be positioned at radio network controller when linking to each other with radio network controller 31, and at this moment we can be considered as query unit the part of radio network controller physically; Also can be positioned at outside the infinite network controller, present embodiment is that example describes outside radio network controller with query unit.
Include first statistical module 301, second statistical module 302, the 3rd statistical module 303, the 4th statistical module 304 in the query unit 30, below the embodiment of each module is made an explanation.
Second statistical module is searched the idle code word of minimal frequency spreading factor and is added up the idle code word number of minimal frequency spreading factor correspondence on current code tree;
Second statistical module travels through the sub-district code tree, searches the idle code word number of current unappropriated minimal frequency spreading factor and this spreading factor correspondence.The method of searching and adding up is as follows:
Idle code word number is initialized as 0
FOR SF=4 TO SF=512 STEP SF*2//according to spreading factor from small to large (4,8,16 ... .) order traversal
FOR k=0 TO k=SF-1 STEP k=k+1//sign indicating number k travels through from 0 to SF-1
IF (C
SF, k is a bell idles)
SF is idle minimal frequency spreading factor;
Idle code word number increases progressively 1;
END?IF
END?FOR
IF (if having found the sign indicating number of a free time)
BREAK; // found minimum idle SF, need not to continue to search, withdraw from
END?IF
END?FOR
The 3rd statistical module calculates the minimal frequency spreading factor and the corresponding code word number of home cell support according to the consumption rule of home cell ability credit rating and each spreading factor;
The 3rd statistical module is the home cell ability credit rating that reports according to Node B and the consumption rule of each spreading factor, minimal frequency spreading factor and corresponding code word number that the home cell of calculation plot correspondence is supported.Computational methods can realize with following mode:
FOR SF=4 TO SF=512 STEP SF*2//according to spreading factor from small to large (4,8,16 ... .) order traversal
What these spreading factors are IF ((consumption rule of the remaining ability credit rating of home cell/current spreading factor)＞1.0) // surplus capacity can support
Write down current spreading factor;
The code word number of current spreading factor supported in record;
BREAK
END?IF
END?FOR
The 4th statistical module calculates the minimal frequency spreading factor and the corresponding code word number of the support of home cell group according to the consumption rule of home cell group ability credit rating and each spreading factor;
If the home cell of sub-district correspondence belongs to the home cell group, the home cell group ability credit rating that reports according to Node B and the consumption rule of each spreading factor calculate minimal frequency spreading factor and corresponding code word number that the home cell group is supported.Home cell ability credit rating is the ability of some sub-districts, and the home cell group is meant the ability that can share between one group of home cell.The calculating home cell is the same with the minimal frequency spreading factor and the corresponding code word number of the support of home cell group, and definition, the thought of the ability credit rating of home cell and home cell group also are consistent.Computational methods can realize with following mode:
FOR SF=4 TO SF=512 STEP SF*2 ∥ according to spreading factor from small to large (4,8,16 ... .) order traversal
IF ((consumption rule of the remaining ability credit rating of home cell group/current spreading factor)＞1.0)
Write down current spreading factor;
The code word number of current spreading factor supported in record;
BREAK；
END?IF
END?FOR
First statistical module, minimal frequency spreading factor, corresponding code word number according to the described home cell group of the described home cell of the described current code tree of described second statistical module counts and/or described the 3rd statistical module counts and/or described the 4th statistical module counts draw minimal frequency spreading factor and corresponding code word number that current area is supported;
Radio network controller carries out radio bearers assignment calculating according to the spreading factor and the corresponding code word number of the described current area of described first statistical module counts.
When radio network controller judges whether to satisfy request user's resource request according to the current area ability, can realize with following two steps:
1) according to Qos quality requirements such as the peak transfer rate in the request message, assurance speed, determine spreading factor size and code word number that this user needs, guarantee that wherein speed is that optionally because some type of service has provided assurance speed, but some type of service does not then require assurance speed;
2) judge that whether the cell ability that first statistical module calculates can satisfy the sign indicating number resource requirement of asking the user, if satisfy, illustrates that cell ability is enough, can support this user's request, otherwise, the cell ability deficiency, this user's request can not be supported, other operations such as directed retry can be carried out.
Below in conjunction with accompanying drawing the concrete enforcement of radio network controller of the present invention is made an explanation.
Fig. 4 is the structural representation of radio network controller of the present invention, as shown in the figure, comprises query unit 30 in the radio network controller, and it is used to inquire about minimal frequency spreading factor and the corresponding code word number that current area is supported; Radio network controller then carries out radio bearers assignment calculating according to the spreading factor and the corresponding code word number of current area.
In query unit, include first statistical module 301, second statistical module 302, the 3rd statistical module 303, the 4th statistical module 304, below the embodiment of each module is made an explanation.
Second statistical module is searched the idle code word of minimal frequency spreading factor and is added up the idle code word number of minimal frequency spreading factor correspondence on current code tree;
Second statistical module travels through the sub-district code tree, searches the idle code word number of current unappropriated minimal frequency spreading factor and this spreading factor correspondence.The method of searching and adding up is as follows:
Idle code word number is initialized as 0
FOR SF=4 TO SF=512 STEP SF*2//photograph spreading factor from small to large (4,8,16 ... .) order traversal
FOR k=0 TO k=SF-1 STEP k=k+1//sign indicating number k travels through from 0 to SF-1
IF (C
SF, k is a bell idles)
SF is idle minimal frequency spreading factor;
Idle code word number increases progressively 1;
END?IF
END?FOR
IF (if having found the sign indicating number of a free time)
BREAK; // found minimum idle SF, need not to continue to search, withdraw from
END?IF
END?FOR
The 3rd statistical module calculates the minimal frequency spreading factor and the corresponding code word number of home cell support according to the consumption rule of home cell ability credit rating and each spreading factor;
The 3rd statistical module is the home cell ability credit rating that reports according to Node B and the consumption rule of each spreading factor, minimal frequency spreading factor and corresponding code word number that the home cell of calculation plot correspondence is supported.Computational methods can realize with following mode:
FOR SF=4 TO SF=512 STEP SF*2//according to spreading factor from small to large (4,8,16 ... .) order traversal
What these spreading factors are IF ((consumption rule of the remaining ability credit rating of home cell/current spreading factor)＞1.0) // surplus capacity can support
Write down current spreading factor;
The code word number of current spreading factor supported in record;
BREAK
END?IF
END?FOR
The 4th statistical module calculates the minimal frequency spreading factor and the corresponding code word number of the support of home cell group according to the consumption rule of home cell group ability credit rating and each spreading factor;
If the home cell of sub-district correspondence belongs to the home cell group, the home cell group ability credit rating that reports according to Node B and the consumption rule of each spreading factor calculate minimal frequency spreading factor and corresponding code word number that the home cell group is supported.Home cell ability credit rating is the ability of some sub-districts, and the home cell group is meant the ability that can share between one group of home cell.The calculating home cell is the same with the minimal frequency spreading factor and the corresponding code word number of the support of home cell group, and definition, the thought of the ability credit rating of home cell and home cell group also are consistent.Computational methods can realize with following mode:
FOR SF=4 TO SF=512 STEP SF*2//according to spreading factor from small to large (4,8,16 ... .) order traversal
IF ((consumption rule of the remaining ability credit rating of home cell group/current spreading factor)＞1.0)
Write down current spreading factor;
The code word number of current spreading factor supported in record;
BREAK；
END?IF
END?FOR
First statistical module, minimal frequency spreading factor, corresponding code word number according to the described home cell group of the described home cell of the described current code tree of described second statistical module counts and/or described the 3rd statistical module counts and/or described the 4th statistical module counts draw minimal frequency spreading factor and corresponding code word number that current area is supported;
Radio network controller carries out radio bearers assignment calculating according to the spreading factor and the corresponding code word number of the described current area of described first statistical module counts.
When radio network controller judges whether to satisfy request user's resource request according to the current area ability, can realize with following two steps:
1) according to Qos quality requirements such as the peak transfer rate in the request message, assurance speed, determine spreading factor size and code word number that this user needs, guarantee that wherein speed is that optionally because some type of service has provided assurance speed, but some type of service does not then require assurance speed;
2) judge that whether the cell ability that first statistical module calculates can satisfy the sign indicating number resource requirement of asking the user, if satisfy, illustrates that cell ability is enough, can support this user's request, otherwise, the cell ability deficiency, this user's request can not be supported, other operations such as directed retry can be carried out.
From the above, the present invention proposes in the WCDMA mobile communication system and to take situation by ovsf code tree utilance, home cell ability credit rating and home cell group ability credit rating and weigh cell ability.By cell downlink ovsf code tree being taken the monitoring of situation, home cell ability credit rating and home cell group credit rating consumption situation, calculate the minimal frequency spreading factor that current area can be supported, thereby make and in the Radio Link assignment process, can in time utilize cell capacity information, thereby improve call completing rate of calling out and the operation of being convenient to follow-up flow process.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (13)
1, a kind of cell ability judging method is characterized in that, comprises the steps:
Minimal frequency spreading factor and corresponding code word number that the inquiry current area is supported;
Spreading factor and corresponding code word number according to current area are carried out radio bearers assignment calculating.
2, the method for claim 1 is characterized in that, minimal frequency spreading factor and corresponding code word number that described inquiry current area is supported comprise the steps:
On current code tree, search the idle code word of minimal frequency spreading factor and add up the idle code word number of minimal frequency spreading factor correspondence, and/or
Consumption rule according to home cell ability credit rating and each spreading factor calculates minimal frequency spreading factor and the corresponding code word number that home cell is supported, and/or
Consumption rule according to home cell group ability credit rating and each spreading factor calculates minimal frequency spreading factor and the corresponding code word number that the home cell group is supported;
According to described current code tree and/or the minimal frequency spreading factor of described home cell and/or described home cell group, corresponding code word number, draw minimal frequency spreading factor and corresponding code word number that current area is supported.
3, method as claimed in claim 2 is characterized in that, the described idle code word number of searching the idle code word of minimal frequency spreading factor and adding up the minimal frequency spreading factor correspondence on current code tree comprises the steps:
According to spreading factor order traversal sub-district code tree from small to large;
Traversal sign indicating number number in 0 to n scope yard until finding bell idles, described n is that spreading factor subtracts 1;
With the spreading factor of this bell idles as minimal frequency spreading factor;
Idle code word number is increased progressively the 1 idle code word number as the minimal frequency spreading factor correspondence.
4, method as claimed in claim 2 is characterized in that, described consumption rule according to home cell ability credit rating and each spreading factor calculates minimal frequency spreading factor and the corresponding code word number that home cell is supported, comprises the steps:
According to spreading factor order traversal home cell from small to large;
When the remaining ability credit rating of home cell during, write down current spreading factor and support minimal frequency spreading factor and the corresponding code word number that the code word number of current spreading factor is supported as home cell divided by the consumption method of current spreading factor＞1.0.
As claim 2 or 4 described methods, it is characterized in that 5, the consumption rule of described home cell ability credit rating and each spreading factor is that Node B reports.
6, method as claimed in claim 2 is characterized in that, described consumption rule according to home cell group ability credit rating and each spreading factor calculates minimal frequency spreading factor and the corresponding code word number that the home cell group is supported, may further comprise the steps:
According to spreading factor order traversal home cell group from small to large;
When the remaining ability credit rating of home cell group during, write down current spreading factor and support minimal frequency spreading factor and the corresponding code word number that the code word number of current spreading factor is supported as the home cell group divided by the consumption method of current spreading factor＞1.0.
As claim 2 or 6 described methods, it is characterized in that 7, the consumption rule of described home cell group ability credit rating and each spreading factor is that Node B reports.
8, method as claimed in claim 2, it is characterized in that, describedly drawing minimal frequency spreading factor and the corresponding code word number that current area is supported, is to be the code word number of this spreading factor correspondence of supporting of current area as the minimal frequency spreading factor of current area support, described code word number reckling with the maximum in the described minimal frequency spreading factor that draws.
9, a kind of cell ability judging system comprises radio network controller, it is characterized in that, also comprises the query unit that links to each other with radio network controller, is used to inquire about minimal frequency spreading factor and the corresponding code word number that current area is supported;
Described radio network controller carries out radio bearers assignment calculating according to the spreading factor and the corresponding code word number of current area.
10, system as claimed in claim 9 is characterized in that, described query unit comprises first statistical module and second statistical module and/or the 3rd statistical module and/or the 4th statistical module, wherein:
Second statistical module is searched the idle code word of minimal frequency spreading factor and is added up the idle code word number of minimal frequency spreading factor correspondence on current code tree;
The 3rd statistical module calculates the minimal frequency spreading factor and the corresponding code word number of home cell support according to the consumption rule of home cell ability credit rating and each spreading factor;
The 4th statistical module calculates the minimal frequency spreading factor and the corresponding code word number of the support of home cell group according to the consumption rule of home cell group ability credit rating and each spreading factor;
First statistical module, minimal frequency spreading factor, corresponding code word number according to the described home cell group of the described home cell of the described current code tree of described second statistical module counts and/or described the 3rd statistical module counts and/or described the 4th statistical module counts draw minimal frequency spreading factor and corresponding code word number that current area is supported;
Described radio network controller carries out radio bearers assignment calculating according to the spreading factor and the corresponding code word number of the described current area of described first statistical module counts.
11, system as claimed in claim 9 is characterized in that, described query unit is in described radio network controller, or outside described radio network controller.
12, a kind of radio network controller is characterized in that, comprises query unit, is used to inquire about minimal frequency spreading factor and the corresponding code word number that current area is supported;
Described radio network controller carries out radio bearers assignment calculating according to the spreading factor and the corresponding code word number of current area.
13, radio network controller as claimed in claim 12 is characterized in that, described query unit comprises first statistical module and second statistical module and/or the 3rd statistical module and/or the 4th statistical module, wherein:
Second statistical module is searched the idle code word of minimal frequency spreading factor and is added up the idle code word number of minimal frequency spreading factor correspondence on current code tree;
The 3rd statistical module calculates the minimal frequency spreading factor and the corresponding code word number of home cell support according to the consumption rule of home cell ability credit rating and each spreading factor;
The 4th statistical module calculates the minimal frequency spreading factor and the corresponding code word number of the support of home cell group according to the consumption rule of home cell group ability credit rating and each spreading factor;
First statistical module, minimal frequency spreading factor, corresponding code word number according to the described home cell group of the described home cell of the described current code tree of described second statistical module counts and/or described the 3rd statistical module counts and/or described the 4th statistical module counts draw minimal frequency spreading factor and corresponding code word number that current area is supported;
Described radio network controller carries out radio bearers assignment calculating according to the spreading factor and the corresponding code word number of the described current area of described first statistical module counts.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008110074A1 (en) * | 2007-03-14 | 2008-09-18 | Huawei Technologies Co., Ltd. | A method and device for relieving congestion of credit resources |
| CN101801061A (en) * | 2010-02-11 | 2010-08-11 | 华为技术有限公司 | Credit rating consumption rule reporting method, admittance control method and device |
| CN102195671A (en) * | 2010-03-12 | 2011-09-21 | ***通信集团公司 | Same-frequency and multi-cell united detection method and detecting system |
| CN101198092B (en) * | 2007-02-13 | 2011-11-16 | 华为技术有限公司 | Method, system and device for transmitting data to user's set |
| CN102256209A (en) * | 2010-05-20 | 2011-11-23 | 中兴通讯股份有限公司 | Method, system and Node B for reporting consumption rule |
| CN101772145B (en) * | 2008-12-31 | 2012-05-23 | 华为技术有限公司 | Method and device for allocating code word number and power |
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- 2006-07-31 CN CNB2006101037723A patent/CN100566438C/en active Active
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| CN101198092B (en) * | 2007-02-13 | 2011-11-16 | 华为技术有限公司 | Method, system and device for transmitting data to user's set |
| WO2008110074A1 (en) * | 2007-03-14 | 2008-09-18 | Huawei Technologies Co., Ltd. | A method and device for relieving congestion of credit resources |
| CN101022673B (en) * | 2007-03-14 | 2010-08-25 | 华为技术有限公司 | Method and device for removing credit degree resource congestion |
| CN101772145B (en) * | 2008-12-31 | 2012-05-23 | 华为技术有限公司 | Method and device for allocating code word number and power |
| US8432829B2 (en) | 2008-12-31 | 2013-04-30 | Huawei Technologies Co., Ltd. | Method and apparatus for allocating the number of code words and power |
| CN101801061A (en) * | 2010-02-11 | 2010-08-11 | 华为技术有限公司 | Credit rating consumption rule reporting method, admittance control method and device |
| WO2011098045A1 (en) * | 2010-02-11 | 2011-08-18 | 华为技术有限公司 | Method for reporting credit consumption law, method and equipment for admission control |
| CN102195671A (en) * | 2010-03-12 | 2011-09-21 | ***通信集团公司 | Same-frequency and multi-cell united detection method and detecting system |
| CN102256209A (en) * | 2010-05-20 | 2011-11-23 | 中兴通讯股份有限公司 | Method, system and Node B for reporting consumption rule |
Also Published As
| Publication number | Publication date |
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| CN100566438C (en) | 2009-12-02 |
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