CN102316519A - Method and device for regulating value of physical control format indicator channel - Google Patents
Method and device for regulating value of physical control format indicator channel Download PDFInfo
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Abstract
The invention provides a method for regulating a value of a physical control format indicator channel. The method comprises the following steps of: acquiring statistical information, wherein the statistical information comprises one or more kinds of control channel resource information, service resource information and service channel quality of service information; and regulating the value of the physical control format indicator channel according to the statistical information. The invention also provides a device for regulating the value of the physical control format indicator channel. By the method, the phenomenon of utilization unbalance between control channel resources and service channel resources can be better avoided, and the phenomenon of high system message frequency caused by frequent conversion can be prevented.
Description
Technical field
The present invention relates to GSM, relate in particular to a kind of method and apparatus of adjusting the value of Physical Control Format Indicator Channel.
Background technology
Long Term Evolution (Long Term Evolution; LTE) the down link Physical Control Format Indicator Channel carries and is used for Physical Downlink Control Channel (Physical downlink control channel, PDCCH) information of the OFDM symbol numbers of transmission (1,2 or 3 even 4) in the sub-frame.It is as shown in table 1 to be defined in the OFDM assemble of symbol that can be used to transmit PDCCH in the sub-frame in the agreement.
Table 1
(how this confirms but be not given under which kind of situation the CFI value for Physical controlformat indicator channel, span CFI) to have provided Physical Control Format Indicator Channel under every kind of situation in the agreement.Because CFI information will issue in each Transmission Time Interval (TTI), method therefore relatively commonly used at present has two kinds: first method is that each TTI dynamically adjusts its value as required; Second method is directly to be fixed as certain value.The defective that these two kinds of methods exist is: first method can cause frequently issuing of system message; Second method possibly cause the waste of control channel resource or the situation of control channel inadequate resource; This method also can influence the reasonable utilization of service resources; Resource-constrained such as control; When service resources is relatively more sufficient, do not had the residue service resources to also have remaining situation, will not influence resource utilization and professional quality assurance if do not adjust the value of CFI this moment yet this moment may occur controlling resource.
Summary of the invention
The technical problem that the present invention will solve is the method and apparatus that proposes a kind of CFI of adjustment value; To reach to the utilization of control channel reasonable resources; Thereby further reach the balance between the service resources and the control utilization of resources, thereby effectively promote professional ensuring the quality of products.
In order to address the above problem, the invention provides a kind of method of adjusting the Physical Control Format Indicator Channel value, comprising:
Obtain statistical information, said statistical information comprise following one or more: control channel resource information, service resources information and Traffic Channel quality of service information;
Value according to said statistical information adjustment Physical Control Format Indicator Channel.
Further, said method also can have following characteristics, periodically carries out the said statistical information of obtaining, and adjusts the step of the value of Physical Control Format Indicator Channel according to statistical information.
Further; Said method also can have following characteristics; Said control channel resource information comprises the level and smooth information of residue control channel number of unit; Said service resources information comprises: the level and smooth information of surplus lines number of resources, said Traffic Channel quality of service information comprises: up guarantee bit rate satisfies the level and smooth information of rate and/or descending guarantee bit rate satisfies the level and smooth information of rate.
Further, said method also can have following characteristics, and the step of said value according to statistical information adjustment Physical Control Format Indicator Channel comprises:
When residue control channel number of unit be 0 and uplink and downlink ensure that bit rate satisfies rate and all is lower than the speed thresholding; And the surplus lines resource surpasses surplus lines resource thresholding; Then the value of Physical Control Format Indicator Channel increases a designated value, and the value of the Physical Control Format Indicator Channel after increasing is no more than the maximum of Physical Control Format Indicator Channel;
When residue control channel number of unit surpasses residue control channel cell gate in limited time, with the corresponding adjustment number of symbols of this residue control channel unit thresholding of value minimizing of Physical Control Format Indicator Channel.
Further, said method also can have following characteristics, and the step of the value of said adjustment Physical Control Format Indicator Channel comprises:
When residue control channel number of unit is 0; And up guarantee bit rate satisfies rate and is lower than the speed thresholding; And when descending guarantee bit rate satisfies rate and is not less than the speed thresholding, keep the value of Physical Control Format Indicator Channel constant, promote the ascending control channel unit and reserve ratio;
Perhaps; When residue control channel number of unit is 0, and descending guarantee bit rate is lower than the speed thresholding, and up guarantee bit rate is when being not less than the speed thresholding; Keep the value of Physical Control Format Indicator Channel constant, promote the down control channel unit and reserve ratio.
The present invention also provides a kind of device of adjusting the Physical Control Format Indicator Channel value, and said device comprises information acquisition unit and adjustment unit, wherein:
Said information acquisition unit is used for: obtain statistical information, said statistical information comprise following one or more: control channel resource information, service resources information and Traffic Channel quality of service information;
Said adjustment unit is used for: according to the value of said statistical information adjustment Physical Control Format Indicator Channel.
Further, said apparatus also can have following characteristics, and said information acquisition unit is to be used for periodically obtaining statistical information, and said adjustment unit is the value that is used for periodically adjusting said Physical Control Format Indicator Channel.
Further; Said apparatus also can have following characteristics; Said control channel resource information comprises the level and smooth information of residue control channel number of unit; Said service resources information comprises: the level and smooth information of surplus lines number of resources, said Traffic Channel quality of service information comprises: up guarantee bit rate satisfies the level and smooth information of rate and/or descending guarantee bit rate satisfies the level and smooth information of rate.
Further, said apparatus also can have following characteristics, and said adjustment unit is to be used for:
When residue control channel number of unit be 0 and uplink and downlink ensure that bit rate satisfies rate and all is lower than the speed thresholding; And the surplus lines resource surpasses surplus lines resource thresholding; Then the value of Physical Control Format Indicator Channel increases a designated value, and the value of the Physical Control Format Indicator Channel after increasing is no more than the maximum of Physical Control Format Indicator Channel;
When residue control channel number of unit surpasses residue control channel cell gate in limited time, with the corresponding adjustment number of symbols of this residue control channel unit thresholding of value minimizing of Physical Control Format Indicator Channel.
Further, said apparatus also can have following characteristics, and said adjustment unit is to be used for:
When residue control channel number of unit is 0; And up guarantee bit rate satisfies rate and is lower than the speed thresholding; And when descending guarantee bit rate satisfies rate and is not less than the speed thresholding, keep the value of Physical Control Format Indicator Channel constant, promote the ascending control channel unit and reserve ratio;
Perhaps; When residue control channel number of unit is 0, and descending guarantee bit rate is lower than the speed thresholding, and up guarantee bit rate is when being not less than the speed thresholding; Keep the value of Physical Control Format Indicator Channel constant, promote the down control channel unit and reserve ratio.
The method of the invention can be avoided utilizing unbalanced phenomenon between control channel resource and the traffic channel resource preferably, and prevents that frequent changes from causing the frequent phenomenon of system message.Meanwhile, to the reasonable control of CFI value, can better save resource and give Traffic Channel, thereby help the lifting of average spectral efficiency (ase).
Description of drawings
Fig. 1 is the method flow that the present invention adjusts the CFI value.
Embodiment
Core concept of the present invention is: propose a kind of with control channel resource and the mutual balance of traffic channel resource utilance and guarantee that QoS is the semi-static adjustment CFI obtaining value method of benchmark; Obtain statistical information; QoS (Quality of Service, service quality) the assurance situation that comprises the use statistics and the Traffic Channel of control channel resource; Result according to statistical information adjudicates the CFI value.
The present invention provides a kind of method of adjusting the Physical Control Format Indicator Channel value, comprising:
Obtain statistical information, said statistical information comprise following one or more: control channel resource information, service resources information and Traffic Channel quality of service information;
Value according to said statistical information adjustment Physical Control Format Indicator Channel.
Wherein, periodically carry out the said statistical information of obtaining, adjust the step of the value of Physical Control Format Indicator Channel according to statistical information.
Wherein, Said control channel resource information comprises the level and smooth information of residue control channel number of unit; Said service resources information comprises: the level and smooth information of surplus lines number of resources, said Traffic Channel quality of service information comprises: up guarantee bit rate satisfies the level and smooth information of rate and/or descending guarantee bit rate satisfies the level and smooth information of rate.
Wherein, the step of said value according to statistical information adjustment Physical Control Format Indicator Channel comprises:
When residue control channel number of unit be 0 and uplink and downlink ensure that bit rate satisfies rate and all is lower than the speed thresholding; And the surplus lines resource surpasses surplus lines resource thresholding; Then the value of Physical Control Format Indicator Channel increases a designated value, and the value of the Physical Control Format Indicator Channel after increasing is no more than the maximum of Physical Control Format Indicator Channel;
When residue control channel number of unit surpasses residue control channel cell gate in limited time, with the corresponding adjustment number of symbols of this residue control channel unit thresholding of value minimizing of Physical Control Format Indicator Channel;
When residue control channel number of unit is 0; And up guarantee bit rate satisfies rate and is lower than the speed thresholding; And when descending guarantee bit rate satisfies rate and is not less than the speed thresholding, keep the value of Physical Control Format Indicator Channel constant, promote the ascending control channel unit and reserve ratio;
Perhaps; When residue control channel number of unit is 0, and descending guarantee bit rate is lower than the speed thresholding, and up guarantee bit rate is when being not less than the speed thresholding; Keep the value of Physical Control Format Indicator Channel constant, promote the down control channel unit and reserve ratio.
The present invention provides the method for adjustment CFI value to comprise:
Step S1; Preset CFI value judgement cycle T; In each downlink transfer subframe following information being done statistics in the cycle T upgrades: one or more in control channel resource information, service resources information and the Traffic Channel quality of service information if reach the integral multiple of cycle T, get into step S2;
A kind of statistical method is: obtain residue control channel resource information, up-downgoing GBR (Guarantee Bit Rate ensures bit rate) separately and satisfy in rate information, the service resources information one or more; Above-mentioned each information can be carried out smoothly.
Wherein, the span of T can be 50-500ms, also can be decided to be other values as required, and the present invention does not limit this;
Step S2, in the moment of arrival cycle T, do to judge as follows:
Whether condition one, CCE (Control Channel Element, control channel unit) surplus resources surpass CCE residue threshold value NUM_CCE
I, j, wherein i is historical CFI number of symbols, the j span is 1 to (current maximum CFI value-1), NUM_CCE
I, jExpression is the difference of corresponding historical CFI value and other selected CFI value corresponding CCE number under current system bandwidth respectively;
Condition two: judge that descending GBR satisfies ratio and whether is lower than speed and satisfies ratio thresholding Thr_GBR;
Condition three: judge that up GBR satisfies ratio and whether is lower than speed and satisfies ratio thresholding Thr_GBR;
Condition four: judge whether the surplus lines number of resources surpasses surplus lines resource thresholding Thr_RB;
When adjudicating, can all adjudicate, also can only adjudicate wherein one or more conditions to condition one, two, three, four.
Step S3 adjudicates PDCCH (Physical downlinkcontrol channel, physical layer descending control channel) number of symbols adjusted value according to the information adjustment that has obtained, and promptly obtains the CFI adjusted value, thereby obtains new CFI value.
The basic thought of judgement is:
If the CCE resource has residue, and surpass CCE residue threshold value, then reduce the CFI value;
If the CCE resource does not have residue, and the GBR of up-downgoing satisfies rate and all is lower than given thresholding, and the surplus lines resource surpasses surplus lines resource thresholding Thr_RB, and then considering increases the CFI value, thereby increases the dispatcher meeting of each UE;
If the CCE resource does not have residue; Up GBR satisfies rate and is higher than given thresholding, and descending GBR satisfies rate and is lower than given thresholding, perhaps; CCE does not have residue; Descending GBR satisfies rate and is higher than given thresholding, and up GBR satisfies rate and is lower than given thresholding, then increases GBR and satisfies the CCE reservation ratio that rate is lower than a side of given thresholding.
Semi-static definite CFI value provided by the invention confirms that method step is following, referring to Fig. 1, comprising:
In each downlink transfer subframe following information being done statistics in the step 110, cycle T upgrades: the level and smooth information of residue control channel number of resources; Up-downgoing GBR separately satisfies the level and smooth information of rate; The level and smooth information of surplus lines number of resources; If reach the integral multiple of cycle T, get into step 120; T is the CFI value judgement cycle;
Step 120, the moment of arrival cycle T, according to the information of statistics the CFI value is adjusted, comprising:
(a) if residue CCE number be 0 and up-downgoing GBR satisfy rate and all be lower than speed thresholding Thr_GBR; And the surplus lines resource surpasses surplus lines resource thresholding Thr_RB; Then the CFI value increases designated value; This designated value can be an OFDM symbol, and the note adjustment amount is a Δ, and adjusted CFI value can not surpass the maximum of CFI;
(b) if residue CCE number be 0 and up GBR satisfy rate and be not less than thresholding Thr_GBR; And satisfying rate, descending GBR is lower than thresholding Thr_GBR; Keep the CFI value constant, can consider to change up-downgoing CCE and reserve ratio, promote descending CCE under this situation and reserve ratio; If residue CCE number be 0 and up GBR satisfy rate and be lower than thresholding Thr_GBR, and descending GBR satisfies rate and is not less than thresholding Thr_GBR, keeps the CFI value constant, promotes up CCE and reserves ratio;
Wherein, the step-length that adjustment up-downgoing CCE reserves ratio is Step_CCE, and span is 0.1-0.5;
(c) if residue CCE outnumbers Thr_CCE
i, then need carry out CFI value decreased number, the minimizing value is CCE residue thresholding Thr_CCE
iCorresponding adjustment number of symbols Δ;
Step 130, output CFI value is CFI
Current=Δ+CFI
His
Concrete, step 110) information smoothly can adopt but is not limited to (1-α) T in
His+ α T
Current, wherein α is a smoothing factor, T
HisBe the historical information after level and smooth, T
CurrentCurrent acquisition up-to-date information.
Further specify through concrete application example below.
Embodiment 1
Suppose the 10MHz system bandwidth, conventional subframe, two antenna ports, conventional CP, the corresponding CCE number of different CFI values is respectively: 9,26,42, if current sign is 3, the threshold value of reducing an OFDM symbol and two OFDM symbols is respectively 16 and 33.If thresholding Thr_GBR value is 0.95.Wherein up-downgoing reservation CCE ratio is 1: 2, promptly up 14 CCE, descending 28 CCE.
Carry out Information Statistics, the Information Statistics result is: CCE residue number is 0, and it is 100% that up GBR satisfies rate, and it is 80% that descending GBR satisfies rate.
Judge according to statistical information; CCE residue number is 0; Up GBR satisfies rate 100% greater than Thr_GBR; Descending GBR satisfies rate 80% less than Thr_GBR, satisfies situation in the step 120 (b), promotes descending CCE resource reservation ratio; Its Step_CCE value is 0.1, and
individual CE need distribute to descending so; This moment, up CCE number was 9, and descending CCE number is 33; Do not change the CFI value this moment.
Embodiment 2
Suppose the 10MHz system bandwidth, conventional subframe, two antenna ports, conventional CP, the corresponding CCE number of different CFI values is respectively: 9,26,42, if current sign is 3, the threshold value of reducing an OFDM symbol and two OFDM symbols is respectively 16 and 33.If thresholding Thr_GBR value is 0.95.Wherein up-downgoing reservation CCE ratio is 1: 2, promptly up 14 CCE, descending 28 CCE.
Carry out Information Statistics, the Information Statistics result is: CCE residue number is 0, and it is 85% that up GBR satisfies rate, and it is 80% that descending GBR satisfies rate.
Judge that according to statistical information because CCE residue number is 0, up-downgoing GBR satisfies rate and all is lower than thresholding Thr_GBR, satisfies situation in the step 120 (a), the CFI value increases by 1.Because the maximum number of symbols of current configuration CFI value is 3, and adjusted CFI value can not surpass the maximum of CFI, the result who therefore judges is that the CFI value is constant.
The present invention also provides a kind of device of adjusting the Physical Control Format Indicator Channel value, and said device comprises information acquisition unit and adjustment unit, wherein:
Said information acquisition unit is used for: obtain statistical information, said statistical information comprise following one or more: control channel resource information, service resources information and Traffic Channel quality of service information;
Said adjustment unit is used for: according to the value of said statistical information adjustment Physical Control Format Indicator Channel.
Wherein, said information acquisition unit is to be used for periodically obtaining statistical information, and said adjustment unit is the value that is used for periodically adjusting said Physical Control Format Indicator Channel.
Wherein, Said control channel resource information comprises the level and smooth information of residue control channel number of unit; Said service resources information comprises: the level and smooth information of surplus lines number of resources, said Traffic Channel quality of service information comprises: up guarantee bit rate satisfies the level and smooth information of rate and/or descending guarantee bit rate satisfies the level and smooth information of rate.
Wherein, said adjustment unit is to be used for:
When residue control channel number of unit be 0 and uplink and downlink ensure that bit rate satisfies rate and all is lower than the speed thresholding; And the surplus lines resource surpasses surplus lines resource thresholding; Then the value of Physical Control Format Indicator Channel increases a designated value, and the value of the Physical Control Format Indicator Channel after increasing is no more than the maximum of Physical Control Format Indicator Channel;
When residue control channel number of unit surpasses residue control channel cell gate in limited time, with the corresponding adjustment number of symbols of this residue control channel unit thresholding of value minimizing of Physical Control Format Indicator Channel;
When residue control channel number of unit is 0; And up guarantee bit rate satisfies rate and is lower than the speed thresholding; And when descending guarantee bit rate satisfies rate and is not less than the speed thresholding, keep the value of Physical Control Format Indicator Channel constant, promote the ascending control channel unit and reserve ratio;
Perhaps; When residue control channel number of unit is 0, and descending guarantee bit rate is lower than the speed thresholding, and up guarantee bit rate is when being not less than the speed thresholding; Keep the value of Physical Control Format Indicator Channel constant, promote the down control channel unit and reserve ratio.
Above embodiment is just in order to help to explain method for using of the present invention, and it does not limit the scope of application of the present invention; In practical application, on the practical implementation detailed rules and regulations and the scope of application, may change to some extent.It is that the method that the semi-static CFI value of target is confirmed all should be regarded as protection scope of the present invention that the present invention provides with the balance between control channel resource and the traffic channel resource.
Claims (10)
1. a method of adjusting the Physical Control Format Indicator Channel value is characterized in that, comprising:
Obtain statistical information, said statistical information comprise following one or more: control channel resource information, service resources information and Traffic Channel quality of service information;
Value according to said statistical information adjustment Physical Control Format Indicator Channel.
2. the method for claim 1 is characterized in that, periodically carries out the said statistical information of obtaining, and adjusts the step of the value of Physical Control Format Indicator Channel according to statistical information.
3. the method for claim 1; It is characterized in that; Said control channel resource information comprises the level and smooth information of residue control channel number of unit; Said service resources information comprises: the level and smooth information of surplus lines number of resources, said Traffic Channel quality of service information comprises: up guarantee bit rate satisfies the level and smooth information of rate and/or descending guarantee bit rate satisfies the level and smooth information of rate.
4. the method for claim 1 is characterized in that, the step of said value according to statistical information adjustment Physical Control Format Indicator Channel comprises:
When residue control channel number of unit be 0 and uplink and downlink ensure that bit rate satisfies rate and all is lower than the speed thresholding; And the surplus lines resource surpasses surplus lines resource thresholding; Then the value of Physical Control Format Indicator Channel increases a designated value, and the value of the Physical Control Format Indicator Channel after increasing is no more than the maximum of Physical Control Format Indicator Channel;
When residue control channel number of unit surpasses residue control channel cell gate in limited time, with the corresponding adjustment number of symbols of this residue control channel unit thresholding of value minimizing of Physical Control Format Indicator Channel.
5. like the arbitrary described method of claim 1 to 4, it is characterized in that the step of the value of said adjustment Physical Control Format Indicator Channel comprises:
When residue control channel number of unit is 0; And up guarantee bit rate satisfies rate and is lower than the speed thresholding; And when descending guarantee bit rate satisfies rate and is not less than the speed thresholding, keep the value of Physical Control Format Indicator Channel constant, promote the ascending control channel unit and reserve ratio;
Perhaps; When residue control channel number of unit is 0, and descending guarantee bit rate is lower than the speed thresholding, and up guarantee bit rate is when being not less than the speed thresholding; Keep the value of Physical Control Format Indicator Channel constant, promote the down control channel unit and reserve ratio.
6. a device of adjusting the Physical Control Format Indicator Channel value is characterized in that, said device comprises information acquisition unit and adjustment unit, wherein:
Said information acquisition unit is used for: obtain statistical information, said statistical information comprise following one or more: control channel resource information, service resources information and Traffic Channel quality of service information;
Said adjustment unit is used for: according to the value of said statistical information adjustment Physical Control Format Indicator Channel.
7. device as claimed in claim 6 is characterized in that, said information acquisition unit is to be used for periodically obtaining statistical information, and said adjustment unit is the value that is used for periodically adjusting said Physical Control Format Indicator Channel.
8. device as claimed in claim 6; It is characterized in that; Said control channel resource information comprises the level and smooth information of residue control channel number of unit; Said service resources information comprises: the level and smooth information of surplus lines number of resources, said Traffic Channel quality of service information comprises: up guarantee bit rate satisfies the level and smooth information of rate and/or descending guarantee bit rate satisfies the level and smooth information of rate.
9. device as claimed in claim 6 is characterized in that, said adjustment unit is to be used for:
When residue control channel number of unit be 0 and uplink and downlink ensure that bit rate satisfies rate and all is lower than the speed thresholding; And the surplus lines resource surpasses surplus lines resource thresholding; Then the value of Physical Control Format Indicator Channel increases a designated value, and the value of the Physical Control Format Indicator Channel after increasing is no more than the maximum of Physical Control Format Indicator Channel;
When residue control channel number of unit surpasses residue control channel cell gate in limited time, with the corresponding adjustment number of symbols of this residue control channel unit thresholding of value minimizing of Physical Control Format Indicator Channel.
10. like the arbitrary described device of claim 6 to 9, it is characterized in that said adjustment unit is to be used for:
When residue control channel number of unit is 0; And up guarantee bit rate satisfies rate and is lower than the speed thresholding; And when descending guarantee bit rate satisfies rate and is not less than the speed thresholding, keep the value of Physical Control Format Indicator Channel constant, promote the ascending control channel unit and reserve ratio;
Perhaps; When residue control channel number of unit is 0, and descending guarantee bit rate is lower than the speed thresholding, and up guarantee bit rate is when being not less than the speed thresholding; Keep the value of Physical Control Format Indicator Channel constant, promote the down control channel unit and reserve ratio.
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| CN102316519B (en) | 2014-12-10 |
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